JP2019216602A - Adapter and charging control method - Google Patents

Abstract

To provide an adapter capable of improving safety of a charging process.SOLUTION: A second adapter 10 whose output voltage is adjustable includes: a power conversion unit; a voltage feedback unit; a current feedback unit; and a power adjustment unit whose input end is connected with an output end of the voltage feedback unit and an output end of the current feedback unit and whose output end is connected with the power conversion unit, and that is configured to receive a voltage feedback signal and a current feedback signal, and in a case where the voltage feedback signal indicates that the output voltage of the second adapter reaches a target voltage or in a case where the current feedback signal indicates that an output current of the second adapter reaches a target current, stabilize the output voltage and the output current of the second adapter.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to the technical field of charging, and more particularly, to an adapter and a charging control method.

  The adapter is also called a power adapter, and is used to charge a device to be charged (for example, a terminal). Currently, commercially available adapters generally charge a device to be charged (eg, a terminal) at a constant voltage, but the current drawn by the device to be charged (eg, a terminal) is the maximum output current threshold that the adapter can provide. Is exceeded, the adapter may enter an overload protection state, and charging of the charged device (eg, terminal) may not be possible.

  Embodiments of the present invention provide an adapter and a charging control method for improving safety of a charging process.

  In a first aspect, a power conversion unit configured to obtain an output voltage and an output current of the adapter by converting an input alternating current (AC) is provided, and an input end of the power conversion unit is a power conversion unit. A voltage feedback unit connected to the unit and configured to generate a voltage feedback signal indicating whether the output voltage of the adapter has reached a predetermined target voltage by detecting an output voltage of the adapter; An input terminal is connected to the power conversion unit, and configured to generate a current feedback signal indicating whether or not the output current of the adapter has reached a predetermined target current by detecting an output current of the adapter. A current feedback unit, an input terminal of which is an output terminal of the voltage feedback unit and the current feedback unit. The output terminal of the unit is connected to the power conversion unit, the output terminal receives the voltage feedback signal and the current feedback signal, and the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage. Or if the current feedback signal indicates that the output current of the adapter has reached the target current, a power conditioning unit configured to stabilize the output voltage and output current of the adapter; and An adapter for performing bidirectional communication with the device to be charged via the data line of the charging interface.

  According to a second aspect, there is provided a charge control method used for an adapter, wherein an output voltage and an output current of the adapter are obtained by converting an input alternating current (AC), and an output voltage of the adapter is obtained. Detecting the output voltage of the adapter to generate a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage, and detecting the output current of the adapter to reduce the output current of the adapter to a predetermined value. Generating a current feedback signal indicating whether or not the target current has been reached, and when the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or when the current feedback signal is the adapter. If the output current of the adapter has reached the target current, stabilize the output voltage and output current of the adapter. , To provide a charging control method comprising, a to perform the be-charged device and two-way communication via a data line of the charging interface.

  An adapter according to an embodiment of the present invention includes both a voltage feedback unit and a current feedback unit. The voltage feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output voltage of the adapter in a closed loop, that is, a hardware voltage feedback loop. On the other hand, the current feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output current of the adapter in a closed loop, that is, a hardware current feedback loop. The power adjustment unit according to the embodiment of the present invention may control the output voltage of the adapter and the output current of the adapter in consideration of the feedback information provided by the voltage feedback signal and the current feedback signal based on the double loop feedback control. When either of them reaches the target value, the output voltage and output current of the adapter are stabilized. In other words, in an embodiment of the present invention, when any one of the output voltage and the output current of the adapter reaches the target value, the power adjustment unit immediately senses this result and responds immediately by: Stabilize the output voltage and output current of the adapter and improve the safety of the charging process.

  Hereinafter, in order to more clearly explain the technical solution according to the embodiment of the present invention, drawings necessary for describing the embodiment of the present invention will be briefly introduced. The drawings in the following description are merely some embodiments of the present invention, and it is obvious to those skilled in the art that these drawings can lead to other drawings without creative efforts.

FIG. 1A is a schematic structural diagram of a second adapter according to an embodiment of the present invention. FIG. 1B is a schematic structural diagram of the power conversion unit according to the embodiment of the present invention. FIG. 2 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 3 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 4 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 5 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 6 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 7 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 8 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 9 is a schematic structural diagram of the voltage comparison unit according to the embodiment of the present invention. FIG. 10 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 11 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 12 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 13 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 14 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 15 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 16 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 17 is a schematic structural diagram of the current comparison unit according to the embodiment of the present invention. FIG. 18 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 19A is a schematic diagram illustrating a connection method between the second adapter and the device to be charged according to the embodiment of the present invention. FIG. 19B is a schematic diagram of the quick charge communication process according to the embodiment of the present invention. FIG. 20 is a schematic diagram of a pulsating direct current current waveform. FIG. 21 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 22 is a schematic diagram of a pulsating direct current in the constant current mode according to the embodiment of the present invention. FIG. 23 is a circuit diagram of the second adapter according to the embodiment of the present invention. FIG. 24 is a flowchart of the charging control method according to the embodiment of the present invention.

  Hereinafter, technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are merely some but not all embodiments of the present invention. All other embodiments obtained based on the embodiments of the present invention without the creative efforts of those skilled in the art should be included in the protection scope of the present invention.

  In the related art, a first adapter for operating in a constant voltage mode to charge a device to be charged (eg, a terminal) has been described. The first adapter keeps the voltage output in the constant voltage mode basically constant, for example, 5V, 9V, 12V or 20V.

  The voltage output from the first adapter is not directly applied to both ends of the battery, but is converted by a conversion circuit in the device to be charged (for example, a terminal), so that the voltage in the device to be charged (for example, a terminal) is changed. Obtain the desired charging voltage and / or charging current of the battery.

  The conversion circuit is configured to convert a voltage output from the first adapter to satisfy a demand for a desired charging voltage and / or charging current of the battery.

  As an example, the conversion circuit may refer to a charge management module such as an integrated circuit (IC) for managing a charge voltage and / or a charge current of a battery during a process of charging the battery. The conversion circuit has a function of a voltage feedback module and / or a function of a current feedback module, thereby realizing management of a charging voltage and / or a charging current of a battery.

  For example, the charging process of the battery may include one or more of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage. In the trickle charging phase, the conversion circuit may use a current feedback loop to ensure that the current entering the battery in the trickle charging phase meets the desired charging current of the battery (eg, the first charging current). In the constant current charging phase, the conversion circuit uses the current feedback loop to cause the current entering the battery in the constant current charging phase to be the desired charging current of the battery (eg, a second charging current that can be greater than the first charging current). Can be met. In the constant voltage charging phase, the conversion circuit can use a voltage feedback loop to ensure that the voltage applied across the battery in the constant voltage charging phase meets the desired charging voltage of the battery.

  As an example, when the voltage output from the first adapter is higher than the desired charging voltage of the battery, the conversion circuit performs a step-down process on the voltage output from the first adapter to thereby reduce the charge obtained after the step-down conversion. The voltage may be configured to meet the desired charging voltage requirements of the battery. As another example, when the voltage output from the first adapter is lower than the desired charging voltage of the battery, the conversion circuit performs the boosting process on the voltage output from the first adapter to obtain the voltage obtained after the boost conversion. The charging voltage is configured so as to satisfy the requirement of a desired charging voltage of the battery.

  As another example, for example, when the first adapter outputs a constant voltage of 5 V, when the battery is a single cell (a lithium battery cell is used as an example, and the single-cell charging end voltage is 4.2 V), the conversion circuit The (for example, Buck step-down circuit) performs the step-down process on the voltage output from the first adapter, so that the charge voltage obtained after the step-down can satisfy the requirement of the desirable charge voltage of the battery.

  As another example, for example, when the first adapter outputs a constant voltage of 5 V, a battery in which two or more single cells are connected in series by the first adapter (a lithium battery cell is taken as an example, and the charging end voltage of the single cell is Is 4.2 V), the conversion circuit (for example, Boost boost circuit) performs boost processing on the voltage output from the first adapter, so that the charging voltage obtained after boosting is a battery. To satisfy the requirements of the desired charging voltage.

  Since the conversion circuit is limited to the low efficiency of the circuit conversion, it loses the unconverted part of the electrical energy in the form of heat. Such heat is concentrated inside the device to be charged (for example, a terminal). Both the design space and the heat radiation space of the device to be charged (for example, a terminal) are small (for example, a mobile terminal used by a user is becoming lighter and thinner in physical size, and a large amount of electronic devices for improving the performance of the mobile terminal). (The components are arranged densely in the mobile terminal.) This not only increases the difficulty of designing the conversion circuit, but also makes it difficult to quickly release the heat amount concentrated in the device to be charged (for example, the terminal). An abnormality may occur in the charging device (for example, a terminal).

  For example, the amount of heat concentrated in the conversion circuit may cause thermal interference to electronic components near the conversion circuit, and may cause abnormal operation of the electronic components. As another example, the amount of heat concentrated in the conversion circuit may shorten the useful life of the conversion circuit and the electronic components near the conversion circuit. As another example, the amount of heat concentrated in the conversion circuit may cause thermal interference to the battery, and may cause abnormal charging and discharging of the battery. As yet another example, the amount of heat concentrated in the conversion circuit may increase the temperature of the device to be charged (for example, a terminal) and affect the user's use experience during charging. As yet another example, the amount of heat concentrated in the conversion circuit may cause a short circuit in the conversion circuit itself, so that the voltage output from the first adapter is applied directly to both ends of the battery, causing abnormal charging. If the battery is charged with an overvoltage for a long time, it may explode, which is a safety problem.

  Embodiments of the present invention provide a second adapter capable of adjusting an output voltage. The second adapter can acquire battery status information. Battery status information may include current electrical quantity information and / or voltage information for the battery. The second adapter adjusts the output voltage of the second adapter itself based on the acquired state information of the battery, thereby satisfying the demand for the desired charging voltage and / or charging current of the battery. Further, in the constant current charging step in the charging process of the battery, the output voltage adjusted by the second adapter is directly applied to both ends of the battery to charge the battery.

  The second adapter may have a function of a voltage feedback module and a function of a current feedback module in order to realize management of a charging voltage and / or a charging current of a battery.

  The second adapter adjusts the output voltage of the second adapter itself according to the acquired battery state information, wherein the second adapter acquires the battery state information in real time, and acquires the real-time state information of the battery acquired each time. To adjust the output voltage of the second adapter itself to meet the desired charging voltage and / or charging current of the battery.

  Adjusting the output voltage of the second adapter itself based on the battery state information acquired in real time by the second adapter means that the second adapter performs the charging process with the continuous increase of the battery voltage in the charging process. At different times, and adjusts the output voltage of the second adapter itself in real time based on the current state information of the battery, thereby satisfying the demand for the desired charging voltage and / or charging current of the battery. Can be referred to.

  For example, the charging process of the battery may include one or more of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage. During the trickle charging phase, the second adapter may use a current feedback loop to ensure that the current output from the second adapter and into the battery during the trickle charging phase meets the desired charging current requirements of the battery (e.g., First charging current). In the constant current charging phase, the second adapter can use a current feedback loop to ensure that the current output from the second adapter in the constant current charging phase and entering the battery meets the desired charging current requirement of the battery ( For example, a second charging current that can be a charging current greater than the first charging current). In addition, in the constant current charging step, the second adapter may charge the battery by directly applying the output charging voltage to both ends of the battery. In the constant voltage charging phase, the second adapter may use a voltage feedback loop to ensure that the voltage output from the second adapter in the constant voltage charging phase satisfies the desired charging voltage requirement of the battery.

  In the trickle charging step and the constant voltage charging step, the voltage output from the second adapter is converted by using a processing method similar to that of the first adapter, that is, a method of converting the voltage by a conversion circuit in a device to be charged (for example, a terminal). Obtain a desired charging voltage and / or charging current of a battery in a device to be charged (eg, a terminal).

  Optionally, in one embodiment, the current feedback loop of the second adapter can be implemented by software based on a voltage feedback loop. Specifically, when the charging current output from the second adapter does not satisfy the request, the second adapter calculates a desired charging voltage based on the desired charging current, and outputs a voltage from the second adapter by a voltage feedback loop. The output charging voltage is adjusted to the calculated desired charging voltage, that is, the function of the current feedback loop can be realized by the voltage feedback loop by software. However, in the process of charging the battery in the constant voltage mode, the load current in the charging circuit constantly changes rapidly. Requires operation, slows the response of the second adapter to the load current, and the current drawn by the device to be charged (eg, a terminal) may exceed the maximum output current threshold that can be provided by the second adapter. , The second adapter may enter an overload protection state, and charging of the charged device (eg, terminal) may not be able to continue.

  In order to improve the response speed of the second adapter to the load current, a voltage feedback loop in the form of hardware and a current feedback loop in the form of hardware may be provided inside the second adapter. Hereinafter, this will be described in detail with reference to FIG. 1A.

  FIG. 1A is a schematic structural diagram of a second adapter according to the embodiment of the present invention. The second adapter 10 in FIG. 1A may include a power conversion unit 11, a voltage feedback unit 12, a current feedback unit 13, and a power adjustment unit 14.

  The power conversion unit 11 is configured to obtain an output voltage and an output current of the second adapter 10 by converting the input alternating current.

  The voltage feedback unit 12 has an input terminal connected to the power conversion unit 11, detects an output voltage of the second adapter 10, and indicates whether the output voltage of the second adapter 10 has reached a predetermined target voltage. It is configured to generate a voltage feedback signal.

  The current feedback unit 13 has an input terminal connected to the power conversion unit 11, and detects whether the output current of the second adapter 10 has reached a predetermined target current by detecting the output current of the second adapter 10. It is configured to generate a current feedback signal.

  The power adjustment unit 14 has an input terminal connected to an output terminal of the voltage feedback unit 12 and an output terminal of the current feedback unit 13, an output terminal connected to the power conversion unit 11, and receives a voltage feedback signal and a current feedback signal; When the voltage feedback signal indicates that the output voltage of the second adapter 10 has reached the target voltage, or when the current feedback signal indicates that the output current of the second adapter 10 has reached the target current, The output voltage and the output current are configured to be stabilized.

  Stabilizing the output voltage and output current of the second adapter 10 by the power adjustment unit 14 may refer to controlling the power adjustment unit 14 to keep the output voltage and output current of the second adapter 10 constant. Taking the power adjustment unit 14 which is a power adjustment unit of pulse width modulation (PWM) as an example, when the frequency and the duty ratio of the PWM control signal are kept constant, the output voltage and the output current of the second adapter 10 are It can be kept stable.

  The second adapter according to the embodiment of the present invention includes both a voltage feedback unit and a current feedback unit. Here, the voltage feedback unit, the power adjustment unit, and the power conversion unit constitute a hardware circuit for controlling the output voltage of the second adapter in a closed loop, that is, a hardware type voltage feedback loop. The current feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output current of the second adapter in a closed loop, that is, a hardware type current feedback loop. Based on the double loop feedback control, the power adjustment unit according to the embodiment of the present invention considers the feedback information provided by the voltage feedback signal and the current feedback signal, and outputs the output voltage of the second adapter and the output of the second adapter. When one of the currents reaches the target value, the output voltage and the output current of the second adapter are stabilized. In other words, in an embodiment of the present invention, when one of the output voltage and the output current of the second adapter reaches the target value, the power adjustment unit immediately detects this situation and responds immediately, The output voltage and output current of the second adapter are stabilized, and the safety of the charging process is improved.

  Taking the constant voltage mode as an example, the voltage feedback loop mainly serves to adjust the output voltage of the second adapter to a voltage corresponding to the constant voltage mode, while the current feedback loop uses the output current of the second adapter to reduce the target current ( The target current at this time may be the maximum output current allowed in the constant voltage mode), and when the output current of the second adapter reaches the target current, the power adjustment unit detects the current feedback. This situation can be immediately sensed by the loop and can serve to immediately stabilize the output current of the second adapter and prevent its further increase. Similarly, in the constant current mode, the current feedback loop plays a role of adjusting the output current of the second adapter to a current corresponding to the constant current mode, while the voltage feedback loop plays the role of adjusting the output voltage of the second adapter to the target voltage ( At this time, the target voltage may be the maximum output voltage allowed in the constant current mode), and when the output voltage reaches the target voltage, the power adjustment unit causes the voltage feedback loop to execute this condition. And immediately stabilizes the output voltage of the second adapter to prevent its further increase.

  The voltage feedback signal and the current feedback signal do not limit the signal types of the voltage feedback signal and the current feedback signal, but indicate that the respective feedback targets are different. Specifically, the voltage feedback signal is for feeding back the output voltage of the second adapter, and the current feedback signal may be for feeding back the output current of the second adapter. Each of the signals may be a voltage signal.

  The target voltage may be a predetermined fixed value or an adjustable variable. In some embodiments, the second adapter 10 can adjust the voltage value of the target voltage by a specific adjustment circuit according to actual needs. For example, the device to be charged (terminal) transmits a target voltage adjustment instruction to the second adapter, and the second adapter 10 can adjust the voltage value of the target voltage by the target voltage adjustment instruction. As another example, the second adapter 10 can receive the state information of the battery from the device to be charged and adjust the voltage value of the target voltage in real time according to the state of the battery. Similarly, the target current may be a predetermined fixed value or an adjustable variable. In some embodiments, the second adapter 10 can adjust the voltage value of the target current through a specific adjustment circuit according to actual needs. For example, the device to be charged (terminal) transmits a target current adjustment instruction to the second adapter 10, and the second adapter 10 can adjust the voltage value of the target current by the target current adjustment instruction. As another example, the second adapter 10 can receive the state information of the battery from the device to be charged and adjust the current value of the target current in real time according to the state of the battery.

  The device to be charged used in the embodiment of the present invention may be a “communication terminal” (or abbreviated to “terminal”), and may be a wired line connection (for example, a public switched telephone network (PSTN)). ), Digital subscriber line (DSL), digital cable, direct connection cable, and / or another data connection / network) and / or wireless interface (eg, cellular network, wireless local area) Network (wireless local area network, WLAN), digital television network such as digital video broadcasting handheld (DVB-H) network, satellite network, amplitude modulation-frequency modulation, AM- FM) broadcast transmitter and / or another communication terminal Including devices that are configured to receive / transmit communication signals over the wireless interface) which is not limited thereto. A communication terminal configured to communicate via a wireless interface may also be referred to as a “wireless communication terminal”, a “wireless terminal”, and / or a “mobile terminal”. Examples of mobile terminals include satellite or cellular telephones, cellular radiotelephones, personal communication system (PCS) terminals incorporating data processing, fax and data communication functions, radiotelephones, pagers, Personal Digital Assistant (PDA) with Internet / Intranet access, web browser, organizer, calendar and / or global positioning system (GPS) receiver, and a regular laptop and / or Includes, but is not limited to, a palmtop receiver or other electronic device with a radiotelephone communication device (transceiver).

  In some embodiments, the second adapter 10 includes a control unit (refer to the MCU in FIG. 23) configured to control a charging process to improve a degree of intelligence of the second adapter 10. May be. Specifically, the control unit performs two-way communication with a device to be charged (for example, a terminal) to thereby provide instructions or state information (for the terminal to be charged) of the device to be charged (for example, a terminal). The present invention obtains the current voltage and / or state information such as the temperature of the device to be charged) and obtains the device to be charged (eg, , Terminal). In some embodiments, the control unit may be a microcontroller unit (MCU), but embodiments of the present invention are not limited thereto, and may be other types of chips or circuits. Good.

  In some embodiments, the second adapter 10 may include a charging interface (see charging interface 191 of FIG. 19A), however, in embodiments of the present invention, the type of charging interface is not particularly limited, for example, , A universal serial bus (USB) interface, and the USB interface may be a standard USB interface, a micro USB interface, or a Type-C interface. .

  The charging mode or function of the second adapter 10 is related to the selection of the target voltage and the target current. Depending on the different charging modes or functions of the second adapter 10, the values of the target voltage and the target current also differ. Hereinafter, the constant voltage mode and the constant current mode will be described in detail as examples.

  Optionally, in some embodiments, the second adapter 10 operates in a first charging mode that is a constant voltage mode (ie, the second adapter 10 operates in a first charging mode to operate a device to be charged (eg, a terminal). ) Can be charged). In the constant voltage mode, the target voltage of the second adapter 10 is a voltage corresponding to the constant voltage mode. The target current is the maximum output current that the second adapter 10 allows in the constant voltage mode. Specifically, the power adjustment unit 14 adjusts the output voltage of the second adapter 10 to a voltage corresponding to the constant voltage mode based on the voltage feedback signal, and sets the current feedback signal to the output current of the second adapter 10 When it indicates that the maximum output current allowed in the constant voltage mode 10 has been reached, control is performed so that the output current of the second adapter 10 does not exceed the maximum output current allowed in the constant voltage mode of the second adapter 10. It is configured as follows.

  In the constant voltage mode, the output voltage of the second adapter 10 is adjusted to a certain fixed voltage value, and the voltage corresponding to the above-described constant voltage mode is the fixed voltage value. For example, when the output voltage of the second adapter 10 is 5V in the constant voltage mode, the voltage corresponding to the constant voltage mode is 5V.

  In an embodiment of the present invention, the target voltage is set to a voltage corresponding to the constant voltage mode, and the target current is set to the maximum output current allowed by the second adapter in the constant voltage mode. In this way, the second adapter quickly adjusts the output voltage of the second adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback loop, and charges the device to be charged (eg, terminal) with the constant voltage. It can be performed. During the constant voltage charging process, when the output current of the second adapter (that is, the load current) reaches the maximum output current allowed by the second adapter, the second adapter immediately detects this situation by the current feedback loop, and Further, it is possible to prevent a further increase in the output current of the second adapter, prevent occurrence of a charging failure, and improve the response capability of the second adapter to a load current.

  For example, in the constant voltage mode, when the fixed voltage value corresponding to the constant voltage mode is 5 V, the output current of the second adapter is generally maintained between 100 mA and 200 mA. In this case, the target voltage may be set to a fixed voltage value (for example, 5V), and the target current may be set to 500mA or 1A. When the output current of the second adapter increases to a current value corresponding to the target current, the power adjustment unit 14 immediately detects this situation by a current feedback loop and prevents the output current of the second adapter from further increasing. .

  As shown in FIG. 1B, based on the above-described embodiment, the power conversion unit 11 may include a primary rectification unit 15, a transformer 16, a secondary rectification unit 17, and a secondary filter unit 18. The primary rectifier unit 15 directly outputs a voltage having a pulsating waveform to the transformer 16.

  In the related art, the power conversion unit includes a rectification unit and a filter unit located on the primary side, and a rectification unit and a filter unit located on the secondary side. The rectification unit and the filter unit located on the primary side can also be called a primary rectification unit and a primary filter unit. The rectification unit and the filter unit located on the secondary side can also be called a secondary rectification unit and a secondary filter unit. The primary filter unit generally uses a liquid aluminum electrolytic capacitor for filtering, but the relatively large volume of the liquid aluminum electrolytic capacitor results in an increase in adapter volume.

  In the embodiment of the present invention, the power conversion unit 11 includes a primary rectification unit 15, a transformer 16, a secondary rectification unit 17, and a secondary filter unit 18, and the primary rectification unit 15 converts the voltage of the pulsating waveform to Output directly to transformer 16. In other words, since the power conversion unit 11 according to the embodiment of the present invention does not include the primary filter unit, the volume of the second adapter 10 can be significantly reduced, and the second adapter 10 can be carried more conveniently. . The secondary filter unit 18 filters mainly based on a solid aluminum electrolytic capacitor. After removing the primary filter unit from the power conversion unit 11, the load capacity of the solid aluminum electrolytic capacitor is limited, but due to the presence of a hardware type current feedback loop, it can respond immediately to a change in load current, It is possible to prevent a charging failure due to an excessive output current of the second adapter.

  In the above solution with the primary filter unit removed, the maximum output current allowed in the constant voltage mode of the second adapter 10 can be determined based on the capacitance of the capacitor in the secondary filter unit. For example, when it is determined that the maximum load current that the secondary filter unit can withstand is 500 mA or 1 A based on the capacitance of the capacitor in the secondary filter unit, the second adapter is set by setting the target current to 500 mA or 1 A. Can be prevented from being charged due to the output current exceeding the target current.

  Optionally, in some embodiments, the second adapter 10 operates in a second charging mode that is a constant current mode (ie, the second adapter 10 operates in a second charging mode to operate a device to be charged (eg, a terminal). ) Can be charged). In the constant current mode, the target voltage is the maximum output voltage allowed by the second adapter 10 in the constant current mode, and the target current is a current corresponding to the constant current mode. Specifically, the power adjustment unit 14 adjusts the output current of the second adapter 10 to a current corresponding to the constant current mode based on the current feedback signal, and the voltage feedback signal changes the output voltage of the second adapter 10 to the second adapter. When it indicates that the maximum output voltage allowed in the constant current mode 10 has been reached, control is performed so that the output voltage of the second adapter 10 does not exceed the maximum output voltage allowed in the constant current mode of the second adapter 10. It is configured as follows.

  In an embodiment of the present invention, the target current is set to a current corresponding to the constant current mode, and the target voltage is set to the maximum output voltage allowed by the second adapter in the constant current mode. In this way, the second adapter can charge the device to be charged (for example, a terminal) by adjusting the output current of the second adapter to a current corresponding to the constant current mode based on the current feedback loop. During the charging process, when the output voltage of the second adapter reaches the maximum output voltage allowed by the second adapter, the second adapter immediately detects this situation by the voltage feedback loop and immediately changes the output voltage of the second adapter. Further increase can be prevented, and occurrence of charging failure can be prevented.

  Optionally, as shown in FIG. 2, based on any of the embodiments described above, the second adapter 10 may further include a first adjustment unit 21. The first adjusting unit 21 is connected to the voltage feedback unit 12 and is configured to adjust the value of the target voltage.

  In the embodiment of the present invention, a first adjusting unit capable of adjusting the output voltage of the second adapter according to actual needs is introduced, and the intelligence of the second adapter is improved. For example, the second adapter 10 is operable in the first charging mode or the second charging mode, and the first adjusting unit 21 switches the second adapter 10 to the currently used first charging mode or the second charging mode. Adjustment of the value of the target voltage can be executed accordingly.

  Optionally, based on the embodiment of FIG. 2, as shown in FIG. 3, the voltage feedback unit 12 may include a voltage sampling unit 31 and a voltage comparison unit 32. The voltage sampling unit 31 has an input terminal connected to the power conversion unit 11 and is configured to sample an output voltage of the second adapter 10 to obtain a first voltage. The voltage comparison unit 32 has an input terminal connected to the output terminal of the voltage sampling unit 31, compares the first voltage with the first reference voltage, and generates a voltage based on a comparison result between the first voltage and the first reference voltage. It is configured to generate a feedback signal. The first adjustment unit 21 is connected to the voltage comparison unit 32, supplies the first reference voltage to the voltage comparison unit 32, and achieves the purpose of adjusting the value of the target voltage by adjusting the value of the first reference voltage. be able to.

  In addition, the first voltage in the embodiment of the present invention corresponds to the output voltage of the second adapter or is configured to indicate the magnitude of the current output voltage of the second adapter. Further, the first reference voltage in the embodiment of the present invention is configured to correspond to the target voltage or to indicate the magnitude of the target voltage.

  In some embodiments, if the first voltage is less than the first reference voltage, the voltage comparison unit generates a first voltage feedback signal indicating that the output voltage of the second adapter does not reach the target voltage, while generating a first voltage feedback signal. If the one voltage is equal to the first reference voltage, the voltage comparison unit generates a second voltage feedback signal indicating that the output voltage of the second adapter has reached the target voltage.

  In the embodiment of the present invention, the specific form of the voltage sampling unit 31 is not particularly limited. For example, the voltage sampling unit 31 may be a wiring, and in this case, the first voltage is the output voltage of the second adapter. And the first reference voltage is the target voltage. As another example, the voltage sampling unit 31 may include two resistors connected in series that operate as a voltage divider, in which case the first voltage is a voltage obtained by dividing the two resistors. The value of the first reference voltage may be associated with a voltage dividing ratio of the two resistors. For example, when the target voltage is 5V, when the output voltage of the second adapter reaches 5V, the first voltage is 0.5V after being divided by the series connection of two resistors, and the first voltage is 0.5V. The reference voltage can be set to 0.5V.

  The first adjustment unit 21 in the embodiment of FIG. 3 can adjust the first reference voltage in various forms. Hereinafter, this will be described in detail with reference to FIGS.

  Optionally, in some embodiments, as shown in FIG. 4, the first adjustment unit 21 may include a control unit 41 and a first Digital to Analog Converter (DAC). The first DAC 42 has an input terminal connected to the control unit 41 and an output terminal connected to the voltage comparison unit 32. The control unit 41 achieves the purpose of adjusting the value of the first reference voltage through the first DAC 42.

  Specifically, the control unit 41 may be an MCU that can be connected to the first DAC 42 via a DAC port. The MCU outputs a digital signal via the DAC port, and converts the digital signal into an analog signal which is a voltage value of the first reference voltage by the first DAC. The DAC has characteristics that the signal conversion speed is high and the accuracy is high. By adjusting the reference voltage by the DAC, the adjustment speed and control accuracy of the reference voltage by the second adapter can be improved.

  Optionally, in some embodiments, as shown in FIG. 5, the first adjustment unit 21 may include a control unit 51 and an RC filter unit 52. The RC filter unit 52 has an input terminal connected to the control unit 51 and an output terminal connected to the voltage comparison unit 32. The control unit 51 is configured to generate the PWM signal and adjust the value of the first reference voltage by adjusting the duty ratio of the PWM signal.

  Specifically, the control unit 51 may be an MCU that can output a PWM signal via a PWM port. After the PWM signal is filtered by the RC filter circuit 52, a stable analog amount, that is, a first reference voltage can be formed. Since the RC filter circuit 52 has characteristics of being easy to implement and low in cost, adjustment of the first reference voltage can be realized at relatively low cost.

  Optionally, in some embodiments, as shown in FIG. 6, the first adjustment unit 21 may include a control unit 61 and a digital potentiometer 62. The digital potentiometer 62 has a control terminal connected to the control unit 61 and an output terminal connected to the voltage comparison unit 32. The control unit 61 adjusts the value of the first reference voltage by adjusting the division ratio of the digital potentiometer 62.

  Specifically, the control unit 61 may be an MCU, and the MCU can be connected to a control terminal of the digital potentiometer 62 via an inter-integrated circuit (Inter Integrated Circuit, I2C I Square Sea) interface. The digital potentiometer 62 is configured to adjust the partial pressure ratio. The digital potentiometer 62 has a high potential end at VDD, that is, a power supply end, a low potential end is grounded, an output end (also referred to as an adjustment output end) is connected to the voltage comparison unit 32, and the voltage comparison unit 32 has a first reference. It is configured to output a voltage. The digital potentiometer is easy to implement and low in cost, and can achieve adjustment of the first reference voltage at relatively low cost.

  Optionally, based on the embodiment of FIG. 2, as shown in FIG. 7, the voltage feedback unit 12 may include a voltage dividing unit 71 and a voltage comparing unit 72. An input end of the voltage dividing unit 71 is connected to the power conversion unit 11, and is configured to divide the output voltage of the second adapter 10 based on a predetermined voltage dividing ratio to generate a first voltage. The voltage comparing unit 72 has an input terminal connected to the output terminal of the voltage dividing unit 71, compares the first voltage with the first reference voltage, and generates a voltage based on a comparison result between the first voltage and the first reference voltage. It is configured to generate a feedback signal. The first adjusting unit 21 is connected to the voltage dividing unit 71, and adjusts the voltage value of the target voltage by adjusting the voltage dividing ratio of the voltage dividing unit 71.

The difference between the embodiment of FIG. 7 and the embodiment of FIGS. 3 to 6 is mainly that the embodiment of FIGS. 3 to 6 adjusts the voltage value of the target voltage by adjusting the reference voltage of the voltage comparison unit. 7 is to realize the adjustment of the voltage value of the target voltage by adjusting the voltage dividing ratio of the voltage dividing unit 71. In other words, in the embodiment of FIG. 7, when the first reference voltage can be set to a fixed value V _REF and the output voltage of the second adapter is desired to be 5V, the output voltage of the second adapter is 5V. , The voltage dividing ratio of the voltage dividing unit 71 can be adjusted such that the voltage at the output terminal of the voltage dividing unit 71 becomes equal to V _REF . Similarly, if the output voltage of the second adapter is desired to be 3V, the voltage at the output end of the voltage dividing unit 71 is equal to V _REF when the output voltage of the second adapter is 3V. The partial pressure ratio of the pressure unit 71 can be adjusted.

  The embodiment of the present invention realizes sampling of the output voltage of the second adapter and adjustment of the voltage value of the target voltage by the voltage dividing unit, and simplifies the circuit structure of the second adapter.

  The voltage dividing unit 71 according to the embodiment of the present invention can be implemented in various forms. For example, a digital potentiometer, a discrete resistor, and an element such as a switch can realize the function of adjusting the voltage division and the voltage division ratio. it can.

  As an example of the embodiment of the digital potentiometer, as shown in FIG. 8, the voltage dividing unit 71 may include a digital potentiometer 81. The first adjustment unit 21 may include a control unit 82. The digital potentiometer 81 has a high potential end connected to the power conversion unit 11, a low potential end grounded, and an output end connected to the input end of the voltage comparison unit 72. The control unit 82 is connected to the control terminal of the digital potentiometer 81 and is configured to adjust the voltage division ratio of the digital potentiometer 81.

  The voltage comparison unit 72 described above can be implemented in various forms. In some embodiments, as shown in FIG. 9, the voltage comparison unit 72 may include a first operational amplifier. The first operational amplifier has a negative-phase input terminal that receives a first voltage, a common-mode input terminal that receives a first reference voltage, and an output terminal that generates a voltage feedback signal. The first operational amplifier may be called a first error amplifier or a voltage error amplifier.

  Optionally, as shown in FIG. 10, according to any of the embodiments described above, the second adapter 10 is connected to the current feedback unit 13 and configured to adjust the current value of the target current. It may further include two adjustment units 101.

  In an embodiment of the present invention, a second adjusting unit capable of adjusting the output current of the second adapter according to actual needs is introduced to improve the intelligence of the second adapter. For example, the second adapter 10 is operable in the first charging mode or the second charging mode, and the second adjustment unit 101 switches the second adapter 10 to the currently used first charging mode or the second charging mode. The current value of the target current is adjusted based on the target current.

  Optionally, in some embodiments, based on the embodiment of FIG. 10, the current feedback unit 13 may include a current sampling unit 111 and a current comparison unit 112, as shown in FIG. The current sampling unit 111 has an input terminal connected to the power conversion unit 11 and is configured to sample an output current of the second adapter 10 to obtain a second voltage indicating the magnitude of the output current of the second adapter 10. ing. The current comparison unit 112 has an input terminal connected to the output terminal of the current sampling unit 111, compares the second voltage with the second reference voltage, and outputs a current based on a comparison result between the second voltage and the second reference voltage. It is configured to generate a feedback signal. The second adjustment unit 101 is connected to the current comparison unit 112, supplies the second reference voltage to the current comparison unit 112, and adjusts the current value of the target current by adjusting the voltage value of the second reference voltage.

  The second voltage according to the embodiment of the present invention corresponds to the output current of the second adapter or indicates the magnitude of the output current of the second adapter. The second reference voltage according to the embodiment of the present invention corresponds to the target current or indicates the magnitude of the target current.

  Specifically, when the second voltage is smaller than the second reference voltage, the current comparison unit generates a first current feedback signal indicating that the output current of the second adapter does not reach the target current, while the second voltage is lower than the second voltage. If equal to the second reference voltage, the current comparison unit generates a second current feedback signal indicating that the output current of the second adapter has reached the target current.

  The current sampling unit 111 can acquire the second voltage as follows. Specifically, the current sampling unit 111 first samples the output current of the second adapter to obtain a sampling current, and then converts the sampling current to a corresponding sampling voltage based on the magnitude of the sampling current (sampling voltage value). = Sampling current value x sampling resistance). In some embodiments, the sampling voltage can be directly the second voltage. In another embodiment, a voltage obtained by dividing the sampling voltage by a plurality of resistors may be used as the second voltage. The current sampling function in the current sampling unit 111 can be specifically realized by a galvanometer.

  The second adjustment unit in the embodiment of FIG. 11 can adjust the second reference voltage in various forms. Hereinafter, this will be described in detail with reference to FIGS.

  Optionally, in some embodiments, as shown in FIG. 12, the second adjustment unit 101 may include a control unit 121 and a second DAC 122. The second DAC 122 has an input terminal connected to the control unit 121 and an output terminal connected to the current comparison unit 112. The control unit 121 adjusts the voltage value of the second reference voltage through the second DAC 122.

  Specifically, the control unit 121 may be an MCU that can be connected to the second DAC 122 via a DAC port. The MCU outputs a digital signal through the DAC port, and converts the digital signal into an analog signal by the second DAC 122. The analog signal is the voltage value of the first reference voltage. The DAC has characteristics that the signal conversion speed is high and the accuracy is high. By adjusting the reference voltage by the DAC, the adjustment speed and control accuracy of the reference voltage by the second adapter can be improved.

  Optionally, in some embodiments, as shown in FIG. 13, the second adjustment unit 101 may include a control unit 131 and an RC filter unit 132. The RC filter unit 132 has an input terminal connected to the control unit 131 and an output terminal connected to the current comparison unit 112. The control unit 131 is configured to generate a PWM signal and adjust the duty ratio of the PWM signal to adjust the voltage value of the second reference voltage.

  Specifically, the control unit 131 may be an MCU that can output a PWM signal via a PWM port. After the PWM signal is filtered by the RC filter circuit 132, a stable analog amount, that is, a second reference voltage can be formed. Since the RC filter circuit 132 has characteristics of being easy to implement and low in cost, adjustment of the second reference voltage can be realized at relatively low cost.

  Optionally, in some embodiments, as shown in FIG. 14, the second adjustment unit 101 may include a control unit 141 and a digital potentiometer 142. The digital potentiometer 142 has a control end connected to the control unit 141 and an output end connected to the current comparison unit 112. The control unit 141 adjusts the voltage value of the second reference voltage by adjusting the voltage division ratio of the digital potentiometer 142.

  In some embodiments, control unit 141 may be an MCU. The MCU is configured to adjust the voltage division ratio of the digital potentiometer 142, which is connectable to the control terminal of the digital potentiometer 142 via the I2C interface. The digital potentiometer 142 has a high potential end at VDD, that is, a power supply end, a low potential end grounded, an output end (also referred to as an adjustment output end) connected to the voltage comparison unit 112, and It is configured to output a voltage. The digital potentiometer is easy to implement and low in cost, and can achieve adjustment of the second reference voltage at relatively low cost.

  Optionally, in some embodiments, based on the FIG. 10 embodiment, as shown in FIG. 15, the current feedback unit 13 may include a current sampling unit 151, a voltage divider unit 152, and a current comparison unit 153. . The current sampling unit 151 has an input terminal connected to the power conversion unit 11 and is configured to sample the output current of the second adapter 10 to obtain a third voltage indicating the magnitude of the output current of the second adapter 10. ing. The voltage dividing unit 152 has an input terminal connected to the output terminal of the current sampling unit 151, and is configured to divide the third voltage based on a predetermined voltage dividing ratio to generate a second voltage. The current comparing unit 153 has an input terminal connected to the output terminal of the voltage dividing unit 152, compares the second voltage with the second reference voltage, and outputs a current based on a comparison result between the second voltage and the second reference voltage. It is configured to generate a feedback signal. The second adjusting unit 101 is connected to the voltage dividing unit 152, and adjusts the current value of the target current by adjusting the voltage dividing ratio of the voltage dividing unit 152.

The difference between the embodiment of FIG. 15 and the embodiment of FIGS. 11 to 14 is mainly that the embodiment of FIGS. 11 to 14 adjusts the current value of the target current by adjusting the reference voltage of the current comparison unit. The embodiment of FIG. 15 is to realize the adjustment of the current value of the target current by adjusting the voltage dividing ratio of the voltage dividing unit 152. In other words, in the embodiment of FIG. 15, when the second reference voltage can be set to a fixed value V _REF and the output current of the second adapter is desired to be 300 mV, the output current of the second adapter is 300 mV. The voltage division ratio of the voltage dividing unit 152 can be adjusted such that the voltage at the output terminal of the voltage dividing unit 152 becomes equal to V _REF when. Similarly, if it is desired that the output current of the second adapter be 500 mV, the voltage at the output of the voltage divider unit 152 will be equal to V _REF when the output current of the second adapter is 500 mV. The partial pressure ratio of the pressure unit 152 can be adjusted.

  The voltage dividing unit 152 according to the embodiment of the present invention can be implemented in various forms. For example, a digital potentiometer, or a device such as a discrete resistor or a switch can realize the function of adjusting the voltage dividing and the voltage dividing ratio. it can.

  As an example of the embodiment of the digital potentiometer, as shown in FIG. 16, the voltage dividing unit 152 includes a digital potentiometer 161 and the second adjusting unit 101 includes a control unit 162. The digital potentiometer 161 has a high potential terminal connected to the output terminal of the current sampling unit 151, a low potential terminal grounded, and an output terminal connected to the input terminal of the current comparison unit 153. The control unit 162 is connected to the control terminal of the digital potentiometer 161 and is configured to adjust the voltage division ratio of the digital potentiometer 161.

  The control unit described above may be one control unit or a plurality of control units. In some embodiments, the control units in the first adjustment unit and the second adjustment unit described above are the same control unit.

  The above-described current comparison unit 153 can be implemented in various forms. In some embodiments, as shown in FIG. 17, the current comparison unit 153 may include a second operational amplifier. The second operational amplifier has a negative-phase input terminal for receiving a second voltage, a common-mode input terminal for receiving a second reference voltage, and an output terminal for generating a current feedback signal. The second operational amplifier may be called a second error amplifier or a current error amplifier.

  The embodiment of the voltage feedback unit 12 and the current feedback unit 13 and the adjustment mode of the target voltage corresponding to the voltage feedback unit 12 and the target current corresponding to the current feedback unit 13 will be described in detail with reference to FIGS. explained. Hereinafter, an embodiment of the power adjustment unit 14 will be described in detail with reference to FIG.

  Optionally, in some embodiments, as shown in FIG. 18, the voltage feedback unit 12 includes a first operational amplifier having an output configured to output a voltage feedback signal (not shown in FIG. 18, FIG. 9 is referred to specifically). The current feedback unit 13 may include a second operational amplifier (not shown in FIG. 18, specifically see FIG. 17) having an output terminal configured to output a current feedback signal. The power adjustment unit 14 may include a first diode D1, a second diode D2, a photoelectric coupling unit 181, and a PWM control unit 182. The output terminal of the first operational amplifier of the voltage feedback unit 12 (see FIG. 9, the output terminal of the first operational amplifier is configured to output a voltage feedback signal) is connected to the cathode of the first diode D1. Have been. The anode of the first diode D1 is connected to the input terminal of the photoelectric coupling unit 181. The output terminal of the second operational amplifier of the current feedback unit 13 (see FIG. 17, the output terminal of the second operational amplifier is configured to output a current feedback signal) is connected to the cathode of the second diode D2. Have been. The anode of the second diode D2 is connected to the input terminal of the photoelectric coupling unit 181. An output terminal of the photoelectric coupling unit 181 is connected to an input terminal of the PWM control unit 182. An output terminal of the PWM control unit 182 is connected to the power conversion unit 11.

  Note that the first operational amplifier in this specification may refer to the same operational amplifier. Similarly, a second operational amplifier herein can refer to the same operational amplifier.

  Specifically, in the present embodiment, the voltage signal output from the first operational amplifier is a voltage feedback signal, and the voltage signal output from the second operational amplifier is a current feedback signal. If the voltage signal output from the first operational amplifier is 0, it indicates that the output voltage of the second operational amplifier has reached the target voltage, while if the voltage signal of the output of the second operational amplifier is 0, 2 indicates that the output current of the adapter has reached the target current. The first diode D1 and the second diode D2 are two diodes connected in anti-parallel. When the voltage signal output from one of the first operational amplifier and the second operational amplifier is 0, the voltage at the feedback point in FIG. 18 is approximately 0 (a constant voltage difference is required to make the diode conductive). Therefore, the actual voltage at the feedback point is a value slightly larger than 0, and may be, for example, 0.7 V). In this case, the photoelectric coupling unit 181 operates in a stable state, and outputs a stable voltage signal to the PWM control unit 182. Thereafter, the PWM control unit 182 generates a PWM control signal having a constant duty ratio, and the power conversion unit 11 stabilizes the output voltage and the output current of the second adapter. In other words, when one of the output voltage and the output current of the second adapter reaches the target value, the first diode D1 and the second diode D2 connected in anti-parallel sense this situation immediately. Further, the output voltage and the output current of the second adapter are stabilized.

  Optionally, in some embodiments, the second adapter 10 is operable in a first charging mode and a second charging mode, wherein a charging rate for a device to be charged (eg, a terminal) in the second charging mode is a second charging mode. It is faster than the charging speed for a device to be charged (for example, a terminal) in one charging mode. In other words, compared to the second adapter 10 operating in the first charging mode, the second adapter 10 operating in the second charging mode fully charges the battery in a device to be charged (for example, a terminal) having the same capacity. Takes less time.

  The second adapter 10 includes a control unit. In the process in which the second adapter 10 is connected to the device to be charged (for example, a terminal), the control unit controls the charging process in the second charging mode by performing bidirectional communication with the device to be charged (for example, the terminal). I do. The control unit may be the control unit in any of the embodiments described above, for example, the control unit in the first adjustment unit or the control unit in the second adjustment unit.

  The first charging mode may be a normal charging mode, and the second charging mode may be a quick charging mode. The normal charging mode means that a relatively small current value (generally, less than 2.5 A) is output from the second adapter or a device to be charged (eg, less than 15 W) with relatively small power (generally, less than 15 W). , Terminal). In the normal charging mode, several hours are generally required to fully charge a large capacity battery (for example, a battery having a capacity of 3000 mAh). On the other hand, in the fast charging mode, a relatively large current (generally, more than 2.5 A, for example, 4.5 A, 5 A and more) is output from the second adapter, or a relatively large electric power (generally, , 15 W or more) to charge a battery in a device to be charged (for example, a terminal). Compared with the normal charging mode, the second adapter can significantly reduce the charging time required to fully charge a battery of the same capacity in the quick charging mode, and can increase the charging speed.

  In the embodiment of the present invention, there is no particular limitation on the communication content between the control unit of the second adapter and the device to be charged (for example, a terminal) and the form in which the control unit controls the output of the second adapter in the second charging mode. For example, the control unit communicates with the device to be charged (eg, a terminal), exchanges the current voltage or current quantity of the battery at the device to be charged (eg, the terminal), and exchanges the current voltage or current value of the battery. The output voltage or output current of the second adapter can be adjusted based on the amount of electricity. Hereinafter, with reference to specific embodiments, regarding the content of communication between the control unit and the device to be charged (for example, a terminal), and the mode in which the control unit controls the output of the second adapter in the second charging mode, explain in detail.

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing bidirectional communication with the device to be charged (eg, a terminal). However, this may include negotiating a charging mode between the second adapter and the device to be charged (for example, the terminal) by performing bidirectional communication with the device to be charged (for example, the terminal).

  In an embodiment of the present invention, the second adapter performs bidirectional communication with the device to be charged (eg, terminal) instead of indiscriminately rapidly charging the device to be charged (eg, terminal) in the second charging mode. By negotiating whether or not the second adapter can rapidly charge the device to be charged (for example, the terminal) in the second charging mode, the safety of the charging process can be improved.

  Specifically, the control unit negotiates a charging mode between the second adapter and the device to be charged (eg, the terminal) by performing bidirectional communication with the device to be charged (eg, the terminal). The unit transmitting a first instruction to the device to be charged (eg, a terminal); the control unit receiving a response instruction to the first instruction transmitted from the device to be charged (eg, the terminal); If the device to be charged (eg, the terminal) agrees to enable the second charging mode, the control unit may include charging the device to be charged (eg, the terminal) in the second charging mode. . Here, the first instruction is configured to inquire whether a device to be charged (for example, a terminal) is capable of operating the second charging mode, and the reply instruction is to make an instruction for the device to be charged (for example, a terminal). Are configured to indicate whether they agree to enable the second charging mode.

  The above description of the embodiment of the present invention does not limit the master-slave relationship between the second adapter (or the control unit of the second adapter) and the device to be charged (for example, a terminal). In other words, one of the control unit and the device to be charged (eg, a terminal) can initiate a two-way communication session as a master device, while the other is a slave device. A first response or a first reply can be made for the communication initiated by the master device as the device). As a possible embodiment, the roles of the master device and the slave device can be ascertained in the communication process by comparing the level on the second adapter side with respect to ground and the level on the device to be charged (eg terminal) with respect to ground. .

  In the embodiment of the present invention, the specific embodiment of the bidirectional communication between the second adapter (or the control unit of the second adapter) and the device to be charged (for example, a terminal) is not limited. That is, one of the second adapter (or the control unit of the second adapter) and the device to be charged (eg, terminal) starts a communication session as a master device, and the other as a slave device. The master device sends a first response or a first response to the communication session started by the master device, and the master device sends a first response or a second response to the first response or the first response by the slave device. One cycle of the charging mode negotiation process with the slave device is considered completed. In a possible embodiment, the charging operation between the master device and the slave device is completed after the completion of the multi-cycle charging mode negotiation between the master device and the slave device, so that the execution of the charging process after the negotiation is performed safely. And reliability.

  In one form in which the master device may make a second response in response to the slave device's first response or first response to a communication session, the master device may respond to the communication session by the slave device's first response or first response. And a first response corresponding to the received slave device or a second response corresponding to the first response can be performed. By way of example, if the master device receives a first response or a first response of the slave device for a communication session within a predetermined time, the master device may respond to the first response or the second response corresponding to the first response of the slave device. Is performed as follows. Specifically, after one cycle of the charging mode negotiation is completed, the master device and the slave device perform the charging operation in the first charging mode or the second charging mode according to the negotiation result, that is, the second adapter negotiates. Depending on the result, the device is operated in the first charging mode or the second charging mode to charge the device to be charged (for example, a terminal).

  In another form in which the master device may make a first response or a second response in response to the first response of the slave device to the communication session, the master device may generate a second response of the slave device to the communication session within a predetermined time. The second response corresponding to the first response or the first response of the slave device is performed without receiving the one response or the first response. By way of example, a master device may respond to a first response or first response of the slave device without receiving the first response or first response of the slave device for a communication session within a predetermined time. The response is made as follows. Specifically, the master device and the slave device execute the charging operation in the first charging mode after one cycle of the charging mode negotiation is completed, that is, the second adapter performs the charging operation in the first charging mode (for example, the device to be charged (eg, , Device).

  Optionally, in some embodiments, a device to be charged (eg, a terminal) initiates a communication session as a master device, and a second adapter (or a control unit of the second adapter) is initiated by the master device as a slave device. After making a first response or a first response to the communication session, the device to be charged (e.g., the terminal) does not perform a second response corresponding to the first response or the first response of the second adapter, One cycle of the charging mode negotiation process between the second adapter (or the control unit of the second adapter) and the device to be charged (eg, terminal) is considered to be completed. Further, the second adapter can charge the device to be charged (for example, a terminal) in the first charging mode or the second charging mode according to a negotiation result.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by the control unit performing bi-directional communication with the device to be charged (eg, a terminal) includes: Determining a charging voltage for charging the charged device (eg, terminal) output from the second adapter in the second charging mode by performing bidirectional communication with the charged device (eg, terminal); The control unit may set the voltage value of the target voltage such that the voltage value of the target voltage is equal to the charging voltage for charging the device to be charged (eg, a terminal) output from the second adapter in the second charging mode. Adjusting may be included.

  Specifically, the control unit performs bidirectional communication with the device to be charged (for example, a terminal) to charge the device to be charged (for example, the terminal) output from the second adapter in the second charging mode. Determining the voltage includes the control unit transmitting a second instruction to the device to be charged (eg, a terminal) and the control unit transmitting a second instruction to the device to be charged (eg, a terminal) in response to the second instruction transmitted from the device to be charged (eg, the terminal). Receiving instructions. Here, the second instruction is configured to inquire whether the output voltage of the second adapter matches the current voltage of the battery of the device to be charged (for example, the terminal), and a response instruction of the second instruction is provided. Is configured to indicate whether the output voltage of the second adapter matches the current voltage of the battery or is higher or lower than the current voltage of the battery. Alternatively, the second instruction is whether the current output voltage of the second adapter is appropriate as a charging voltage for charging a charged device (eg, a terminal) output from the second adapter in the second charging mode. It can be configured to query whether or not. The reply instruction of the second instruction may be configured to indicate whether the output voltage of the second adapter is appropriate or high or low. The current output voltage of the second adapter matches the current voltage of the battery, or the current output voltage of the second adapter indicates the device to be charged (eg, terminal) output from the second adapter in the second charging mode. Suitable as a charging voltage for charging is that the current output voltage of the second adapter is slightly higher than the current voltage of the battery and the difference between the output voltage of the second adapter and the current voltage of the battery. Is in a predetermined range (generally, several hundred mV).

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing bidirectional communication with the device to be charged (eg, a terminal). Determines the charging current for charging the charged device (eg, terminal) output from the second adapter in the second charging mode by performing bidirectional communication with the charged device (eg, terminal). And controlling the control unit such that the current value of the target current is equal to the charging current for charging the device to be charged (for example, the terminal) output from the second adapter in the second charging mode. May be adjusted.

  Specifically, the control unit performs bidirectional communication with the device to be charged (for example, a terminal) to charge the device to be charged (for example, the terminal) output from the second adapter in the second charging mode. Determining the current includes determining that the control unit transmits a third instruction to the device to be charged (e.g., a terminal) and that the control unit responds to the third instruction transmitted from the device to be charged (e.g., the terminal). Receiving instructions and the control unit causing the control unit to output the charged device (e.g., the terminal) output from the second adapter in the second charging mode based on a maximum charging current currently supported by the device (e.g., the terminal). Determining a charging current for charging the terminal). Here, the third instruction is configured to query the maximum charging current currently supported by the device to be charged (eg, the terminal), and the reply instruction of the third instruction is configured to query the device to be charged (eg, the terminal). Is configured to indicate the maximum charging current currently supported by. In addition, the control unit may output the device to be charged (e.g., the output from the second adapter in the second charging mode based on the maximum charging current currently supported by the device to be charged (e.g., terminal) in various forms. Terminal) can be determined. For example, the second adapter charges the maximum charging current currently supported by the device to be charged (eg, the terminal) to the device to be charged (eg, the terminal) output from the second adapter in the second charging mode. Of the second charging mode in the second charging mode, taking into account factors such as the maximum charging current currently supported by the device to be charged (eg, the terminal) and its own current output capability. A charging current for charging a device to be charged (for example, a terminal) output from the adapter may be determined.

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing bi-directional communication with the device to be charged (eg, a terminal). In the process of the adapter charging the device to be charged (for example, a terminal) in the second charging mode, the control unit performs bidirectional communication with the device to be charged (for example, the terminal), so that the control of the second adapter is performed in the second charging mode. Adjusting the output current may be included.

  Specifically, adjusting the output current of the second adapter by the control unit performing bidirectional communication with the device to be charged (for example, a terminal) requires that the control unit perform the first communication with the device to be charged (for example, a terminal). Transmitting the fourth instruction, the control unit receiving the response instruction of the fourth instruction transmitted from the second adapter, and the control unit changing the output current of the second adapter according to the current voltage of the battery. Adjusting may be included. Here, the fourth instruction is configured to inquire about the current voltage of the device to be charged (eg, a terminal) battery, and the reply instruction of the fourth instruction is configured to indicate the current voltage of the battery. I have.

  Optionally, in some embodiments, as shown in FIG. 19A, the second adapter 10 includes a charging interface 191. Further, in some embodiments, the control unit (MCU in FIG. 23) in the second adapter 10 performs bidirectional communication with the device to be charged (eg, a terminal) via the data line 192 in the charging interface 191. be able to.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by the control unit performing bi-directional communication with the device to be charged (eg, a terminal) includes: It may include determining whether or not a contact failure has occurred in the charging interface by performing bidirectional communication with a device to be charged (for example, a terminal).

  Specifically, the control unit performs bidirectional communication with a device to be charged (for example, a terminal) to determine whether or not a contact failure has occurred in the charging interface. Transmitting a fourth instruction to the terminal), the control unit receiving a response instruction of the fourth instruction transmitted from the device to be charged (e.g., the terminal), and controlling the output voltage of the second adapter by the control unit. And determining whether a contact failure has occurred in the charging interface based on the current voltage of the device to be charged (eg, terminal) battery. Here, the fourth instruction is configured to query the current voltage of the charged device (eg, terminal) battery, and the reply instruction of the fourth instruction is the current instruction of the charged device (eg, terminal) battery. It is configured to indicate a voltage. For example, when the control unit determines that the voltage difference between the output voltage of the second adapter and the current voltage of the device to be charged (for example, the terminal) is higher than a predetermined voltage threshold, the voltage difference is output from the second adapter. This indicates that the impedance divided by the current value is larger than a predetermined impedance threshold, that is, it can be determined that a contact failure has occurred in the charging interface.

  Optionally, in some embodiments, poor contact at the charging interface can be determined by a device to be charged (eg, a terminal). Specifically, the determination is made that the device to be charged (for example, the terminal) transmits the sixth instruction to the control unit, and that the device to be charged (for example, the terminal) responds to the sixth instruction transmitted from the control unit. And whether the device to be charged (e.g., a terminal) has caused a contact failure in the charging interface based on the current voltage of the device to be charged (e.g., the terminal) battery and the output voltage of the second adapter. Is determined. Here, the sixth instruction is configured to inquire about the output voltage of the second adapter, and the response instruction of the sixth instruction is configured to indicate the output voltage of the second adapter. After determining that the device to be charged (e.g., the terminal) has a poor contact at the charging interface, the device to be charged (e.g., the terminal) transmits a fifth instruction to the control unit indicating that the poor contact has occurred at the charging interface. I do. After receiving the fifth instruction, the control unit controls the second adapter such that the second adapter ends the second charging mode.

  Hereinafter, the communication process between the control unit and the device to be charged (eg, a terminal) in the second adapter will be described in more detail with reference to FIG. 19B. It should be noted that the example of FIG. 19B is merely for a person skilled in the art to understand the embodiment of the present invention, and is not intended to limit the embodiment of the present invention to specific numerical values or specific scenarios. It should be. Obviously, various equivalent modifications or changes made by those skilled in the art based on the example described in FIG. 19B belong to the scope of the embodiments of the present invention.

  As shown in FIG. 19B, a process of charging a device to be charged (for example, a terminal) by an output of the second adapter in the second charging mode, that is, a charging process may include the following five steps.

<Stage 1>
After the device to be charged (for example, a terminal) is connected to the power supply device, the type of the power supply device can be detected by the data lines D + and D-. If the power supply detects that it is the second adapter, the current drawn by the device to be charged (eg, the terminal) may be greater than a predetermined current threshold I2 (eg, may be 1A). When the control unit in the second adapter detects that the output current of the second adapter in a predetermined period (for example, the continuous time T1) is equal to or greater than I2, the control unit determines that the device to be charged (for example, the terminal ), The negotiation process between the second adapter and the device to be charged (e.g., terminal) is started, and instruction 1 (e.g., (Corresponding to the first instruction) to inquire whether the device to be charged (for example, the terminal) agrees to charge the device to be charged (for example, the terminal) in the two-charging mode by the second adapter.

  The control unit receives the response instruction of the instruction 1 transmitted from the device to be charged (for example, the terminal), and the response instruction of the instruction 1 is that the device to be charged (for example, the terminal) is in the second charging mode by the second adapter. The control unit re-detects the output current of the second adapter when it indicates that the user does not agree to charge the device to be charged (eg, the terminal) at the second time. If the output current of the second adapter is still greater than or equal to I2 within a predetermined continuous period (which may be, for example, the continuous time T1), the control unit retransmits the instruction 1 to the device to be charged (eg, the terminal); An inquiry is made as to whether the device to be charged (for example, the terminal) agrees to charge the device to be charged (for example, the terminal) in the second charging mode by the second adapter. The control unit may determine that the device to be charged (eg, the terminal) agrees to charge the device to be charged (eg, the terminal) in the second charging mode by the second adapter, or that the output current of the second adapter is equal to or greater than I2. Repeat the above steps of step 1 until the requirements are not met.

  If the device to be charged (e.g., the terminal) agrees that the second adapter charges the device to be charged (e.g., the terminal) in the second charging mode, the communication process proceeds to the second stage.

<Stage 2>
The output voltage of the second adapter may include multiple levels. The control unit transmits the instruction 2 (corresponding to the second instruction) to the device to be charged (for example, the terminal) so that the output voltage (current output voltage) of the second adapter is changed to the device to be charged (for example, the terminal). Inquire if the current voltage of the battery matches.

  The device to be charged (eg, a terminal) sends the response instruction of instruction 2 to the control unit so that the output voltage of the second adapter matches the current voltage of the device to be charged (eg, the terminal), or Indicates whether it is higher or lower than the current voltage of the battery. When the instruction to the instruction 2 indicates that the output voltage of the second adapter is high or low, the control unit adjusts the output voltage of the second adapter by one level and re-executes the instruction 2 to the device to be charged (for example, a terminal). Send and ask again whether the output voltage of the second adapter matches the current voltage of the device to be charged (eg, terminal) battery. The device to be charged (eg, terminal) repeats the above steps of step 2 until it determines that the output voltage of the second adapter matches the current voltage of the battery to be charged (eg, terminal), and if it determines that there is a match, Then, the process proceeds to the third stage.

<Step 3>
The control unit transmits the instruction 3 (corresponding to the third instruction) to the device to be charged (for example, the terminal), and queries the maximum charging current currently supported by the device to be charged (for example, the terminal). The device to be charged (eg, the terminal) indicates the maximum charging current currently supported by the device to be charged (eg, the terminal) by transmitting a reply instruction of the instruction 3 to the control unit, and proceeds to the fourth stage. I do.

<Step 4>
The control unit is configured to charge the charged device (eg, the terminal) output from the second adapter in the second charging mode according to a maximum charging current currently supported by the charged device (eg, the terminal). After determining the charging current, the process proceeds to step 5, the constant current charging step.

<Step 5>
After shifting to the constant current charging stage, the control unit transmits an instruction 4 (corresponding to the fourth instruction) to the device to be charged (for example, the terminal) at a certain time interval, and transmits the instruction to the device to be charged (for example, Terminal) You can query the current voltage of the battery. The device to be charged (for example, the terminal) can feed back the current voltage of the battery for the device to be charged (for example, the terminal) by transmitting a response instruction of the instruction 4 to the control unit. The control unit determines, based on the current voltage of the device to be charged (eg, terminal) battery, whether the charging interface is in good contact and whether the output current of the second adapter needs to be reduced. be able to. The second adapter can transmit an instruction 5 (corresponding to the fifth instruction) to the device to be charged (for example, a terminal) when the charging interface determines that the contact is poor, and the second adapter can perform the second charging. After exiting the mode, reset and go to step 1 again.

  Optionally, in some embodiments, in step 1, when the device to be charged (eg, a terminal) sends a response instruction of the instruction 1, the response instruction of the instruction 1 includes the device to be charged (eg, the terminal). ) Path impedance data (or information). The path impedance data of the device to be charged (eg, a terminal) is configured to determine in step 5 whether the charging interface is in good contact.

  Optionally, in some embodiments, in step 2, the device to be charged (eg, terminal) is from when the second adapter agrees to charge the device to be charged (eg, terminal) in the second charging mode. The time until the control unit adjusts the output voltage of the second adapter to an appropriate charging voltage may be controlled within a certain range. If the time exceeds a predetermined range, the second adapter or the device to be charged (for example, the terminal) can determine that an abnormality has occurred in the communication process of the rapid charging, and reset and shift to step 1 again.

  Optionally, in some embodiments, in step 2, the output voltage of the second adapter may be set to ΔV (ΔV is 200-500 mV) above the current voltage high of the charged device (eg, terminal) battery. ) If higher, the device to be charged (eg, terminal) sends the response instruction of instruction 2 to the control unit so that the output voltage of the second adapter matches the battery voltage of the device to be charged (eg, terminal). To do so.

  Optionally, in some embodiments, in step 4, the rate of regulation of the output current of the second adapter can be controlled to a certain range, and thus, in the second charging mode due to excessive regulation rate. Thus, it is possible to prevent occurrence of an abnormality in the charging process of the device to be charged (for example, a terminal) by the output of the second adapter.

  Optionally, in some embodiments, in step 5, the change in output current of the second adapter may be controlled to within 5%.

  Optionally, in some embodiments, in step 5, the control unit can monitor the path impedance of the charging circuit in real time. Specifically, the control unit may monitor the path impedance of the charging circuit based on the output voltage and the output current of the second adapter and the current voltage of the battery fed back from the device to be charged (eg, the terminal). it can. When the path impedance of the charging circuit is larger than the sum of the path impedance of the device to be charged (eg, terminal) and the impedance of the charging cable (“path impedance of charging circuit”> “path impedance of device to be charged (eg, terminal)) “+ Impedance of charging cable”), the charging interface can determine that the contact is poor, and the second adapter stops charging the device to be charged (eg, terminal) in the second charging mode.

  Optionally, in some embodiments, the second adapter enables the charging of the device to be charged (eg, a terminal) in the second charging mode, and then the control unit and the device to be charged (eg, the terminal). Can be controlled within a certain range to prevent occurrence of an abnormality in the communication process due to a short communication interval.

  Optionally, in some embodiments, stopping the charging process (or stopping the charging process for the charged device (eg, terminal) in the second charging mode by the second adapter) is a recoverable stop and recovery. It is divided into two types of impossible stops.

  For example, when the device to be charged (for example, a terminal) detects a full charge of the battery or a contact failure of the charging interface, the charging process is stopped, the charging communication process is reset, and the charging process returns to step 1. Thereafter, if the device to be charged (eg, the terminal) does not agree with the second adapter to charge the device to be charged (eg, the terminal) in the second charging mode, the communication process does not move to step 2. In this case, a stop of the charging process may be regarded as an unrecoverable stop.

  As another example, if a communication error occurs between the control unit and the device to be charged (eg, a terminal), the charging process is stopped, the charging communication process is reset, and the charging process returns to step 1 again. After satisfying the requirement of step 1, the device to be charged (eg, the terminal) agrees that the second adapter charges the device (eg, the terminal) in the second charging mode to recover the charging process. I do. In this case, a stop of the charging process may be considered a recoverable stop.

  As another example, when the device to be charged (for example, the terminal) detects the occurrence of an abnormality in the battery, the charging process is stopped, the charging communication process is reset, and the charging process returns to step 1. Thereafter, the charged device (eg, terminal) does not agree with the second adapter charging the charged device (eg, terminal) in the second charging mode. After the battery recovers normally and satisfies the requirements of step 1, the device to be charged (eg, terminal) agrees that the second adapter charges the device to be charged (eg, terminal) in the second charging mode. I do. In this case, a stop of the rapid charging process may be considered a recoverable stop.

  The communication steps or operations shown in FIG. 19B are merely examples. For example, in step 1, after the device to be charged (eg, a terminal) is connected to the second adapter, the handshake communication between the device to be charged (eg, the terminal) and the control unit may include Terminal). That is, the device to be charged (for example, the terminal) transmits the instruction 1 and inquires whether the control unit enables the second charging mode. The device to be charged (e.g., the terminal) receives a response instruction of the control unit indicating that the control unit agrees to charge the device to be charged (e.g., the terminal) in the second charging mode by the second adapter; The second adapter starts charging the battery of the device to be charged (for example, the terminal) in the second charging mode.

  As another example, after step 5, a constant voltage charging step may be included. Specifically, in step 5, the device to be charged (eg, a terminal) feeds back the current voltage of the battery to the control unit, and if the current voltage of the battery reaches the voltage threshold for constant voltage charging, the charging step includes: Convert from the constant current charging stage to the constant voltage charging stage. In the constant voltage charging phase, the charging current gradually decreases, and when the charging current drops to a certain threshold, the entire charging process ends, indicating that the battery of the device to be charged (eg, a terminal) is fully charged.

  Optionally, in some embodiments, the output current of the second adapter is a pulsating direct current (a one-way pulsating output current, a pulsating waveform current, or a steamed-bun shaped current). Called). The waveform of the pulsating DC is shown in FIG.

  As the output power of the second adapter increases, the second adapter decreases the service life of the battery because the lithium adapter tends to deposit lithium when charging the battery in the device to be charged (for example, a terminal). In order to improve the safety and safety of the battery, in the embodiment of the present invention, the second adapter is controlled to output a pulsating DC. Pulsating DC reduces the probability and strength of arcing of the contacts at the charging interface and can increase the life of the charging interface. The output current of the second adapter can be set to pulsating DC in various forms. For example, the output current of the second adapter can be set to the pulsating DC by removing the secondary filter unit in the power conversion unit 11, rectifying the secondary current, and then outputting the rectified current to generate the pulsating DC.

  Further, as shown in FIG. 21, based on any of the above-described embodiments, the second adapter 10 can operate in the first charging mode and the second charging mode, and the device to be charged in the second charging mode ( For example, the charging speed for the terminal (the terminal) is faster than the charging speed for the device to be charged (for example, the terminal) in the first charging mode. The power conversion unit 11 may include a secondary filter unit 211, and the second adapter 10 may include a control unit 212. The control unit 212 is connected to the secondary filter unit 211. In the first charging mode, the control unit 212 controls the secondary filter unit 211 to operate so that the voltage value of the output voltage of the second adapter 10 is kept constant. In the second charging mode, the control unit 212 controls the operation of the secondary filter unit 211 to stop so that the output current of the second adapter 10 becomes a pulsating DC.

  In an embodiment of the present invention, the control unit controls whether the secondary filter unit operates or not, so that the second adapter can output a normal direct current having a constant current value, and can output the normal current. Can also output a pulsating DC that varies, so that it is compatible with the conventional charging mode.

  Optionally, in some embodiments, the second adapter 10 is operable in a second charging mode, which may be a constant current mode. In the second charging mode, the output current of the second adapter is an alternating current capable of reducing the lithium deposition phenomenon of the lithium cell and improving the service life of the cell.

  Optionally, in some embodiments, the second adapter 10 is operable in a second charging mode, which may be a constant current mode. In the second charging mode, the output voltage and output current of the second adapter are directly applied to both ends of the battery of the device to be charged (for example, a terminal), and perform direct-charge on the battery.

  Specifically, the direct charging means that the output voltage and the output current of the second adapter are directly applied (or directly introduced) to both ends of a charged device (for example, a terminal) battery without being converted by a conversion circuit. It may refer to charging a battery of a charging device (eg, a terminal). In this way, direct charging can prevent power loss due to the conversion process. In the course of charging according to the second charging mode, the second adapter may be designed as an intelligent adapter to allow adjustment of the charging voltage or the charging current in the charging circuit, by means of such a second adapter Alternatively, by converting the charging current, the burden on the device to be charged (for example, a terminal) can be reduced, and the amount of heat generated by the device to be charged can be reduced. The constant current mode in this specification refers to a charging mode for controlling the output current of the second adapter, and should not be interpreted as requiring that the output current of the second adapter be kept constant (unchanged) at all times. In practice, the second adapter is often charged with a multi-stage constant current in the constant current mode.

  Multi-stage constant current charging has N (N is an integer of 2 or more) charging stages. In the multi-stage constant current charging, the first stage charging can be started with a predetermined charging current. The N charging stages of the multi-stage constant current charging are sequentially performed from the first stage to the (N-1) th stage, and after the charging stage shifts from the previous charging stage to the next charging stage, the charging current value is changed. When the battery voltage reaches the threshold value of the end-of-charge voltage, the charging stage shifts from the previous charging stage to the next charging stage.

  Further, when the output current of the second adapter is a pulsating DC, the constant current mode is a charging mode for controlling the peak value or the average value of the pulsating DC, that is, as shown in FIG. It may refer to a charging mode in which the peak value does not exceed the current corresponding to the constant current mode. When the output current of the second adapter is AC, the constant current mode may refer to a charging mode for controlling the peak value of AC.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to specific examples. It should be noted that the example in FIG. 23 is merely for a person skilled in the art to understand the embodiment of the present invention, and is not intended to limit the embodiment of the present invention to specific numerical values or specific scenarios. It should be. Obviously, various equivalent modifications or changes made by those skilled in the art based on the example illustrated in FIG. 23 are within the scope of the embodiments of the present invention.

  The second adapter includes a power conversion unit (corresponding to the power conversion unit 11). As shown in FIG. 23, the power conversion unit may include an AC AC input terminal, a primary rectifier unit 231, a transformer T1, a secondary rectifier unit 232, and a secondary filter unit 233.

  Specifically, after introducing a rated current (mains current, generally an alternating current at 220 V) to the input terminal of the AC AC, the rated current is transmitted to the primary rectifier unit 231.

  The primary rectifying unit 231 is configured to convert the rated current into a first pulsating DC, and then transmit the first pulsating DC to the transformer T1. In the embodiment of the present invention, the primary rectification unit 231 is not particularly limited, and may be, for example, a bridge rectification unit such as a full bridge rectification unit or a half bridge rectification unit shown in FIG.

  The primary side of a conventional adapter is provided with a primary filter unit. The primary filter unit generally filters by a liquid aluminum electrolytic capacitor, but the relatively large volume of the liquid aluminum electrolytic capacitor results in an increase in the volume of the adapter. Since the primary filter unit is not provided on the primary side of the second adapter according to the embodiment of the present invention, the volume of the second adapter can be significantly reduced.

  Transformer T1 couples the first pulsating DC from the primary side of the transformer to the secondary side to obtain a second pulsating DC and output the second pulsating DC from the secondary winding of transformer T1. Is configured. The transformer T1 may be a normal transformer or a high-frequency transformer having an operation frequency of 50 KHz to 2 MHz. The number and connection form of the primary windings of the transformer T1 vary depending on the type of switching power supply used in the second adapter, but are not particularly limited in the embodiment of the present invention. As shown in FIG. 23, the second adapter can use a flyback switching power supply. The primary winding of the transformer has one end connected to the primary rectifier unit 231 and the other end connected to a switch controlled by a PWM controller. Needless to say, the second adapter may be a second adapter using a forward switching power supply or a push-pull switching power supply. The primary rectifier unit and the transformer in the different types of switching power supplies have their respective topologies, and a detailed description is omitted here for brevity.

  The secondary rectifier unit 232 is configured to rectify the second pulsating DC output from the secondary winding of the transformer T1 to obtain a third pulsating DC. The secondary rectifier unit 232 has various forms, and FIG. 23 shows a typical secondary synchronous rectifier circuit. The synchronous rectifier circuit includes a synchronous rectifier (SR) chip, a MOS (Metal Oxide Semiconductor, MOS) transistor controlled by the SR chip, and a diode connected to both ends of a source and a drain of the MOS transistor. Including. The SR chip transmits a PWM control signal to the gate of the MOS transistor and controls on / off of the MOS transistor to realize secondary synchronous rectification.

  The secondary filter unit 233 rectifies the second pulsating DC output from the secondary rectifier unit 232, and outputs the output voltage and output current of the second adapter (that is, the voltage and current across VBUS and GND in FIG. 23). Is configured to obtain. In the embodiment of FIG. 23, the capacitors in the secondary filter unit 233 can be filtered by a solid capacitor or a solid capacitor and a normal capacitor (for example, a ceramic capacitor) connected in parallel.

  Further, the secondary filter unit 233 may include a switch unit such as the switch transistor Q1 in FIG. The switch transistor Q1 receives the control signal transmitted from the MCU. When the MCU controls the switch transistor Q1 to turn on, the secondary filter unit 233 starts operating to operate the second adapter in the first charging mode. In the first charging mode, the second adapter may have a DC output voltage of 5V and a stable output current. When the MCU controls the switch transistor Q1 to turn off, the secondary filter unit 233 stops operating and operates the second adapter in the second charging mode. In the second charging mode, the second adapter directly outputs the pulsating DC obtained by rectifying the secondary rectification unit 232.

  Further, the second adapter may include a voltage feedback unit (corresponding to the voltage feedback unit 12). As shown in FIG. 23, the voltage feedback unit may include a resistor R1, a resistor R2, and a first operational amplifier OPA1.

  Specifically, the resistances R1 and R2 sample the output voltage of the second adapter (that is, the voltage at VBUS) and transfer the obtained first voltage to the negative-phase input terminal of the OPA1 so that the second adapter Shows the magnitude of the output voltage. The common mode input terminal of the first operational amplifier OPA1 is connected to the DAC1 port of the MCU via the DAC1. The MCU adjusts the voltage value of the reference voltage (corresponding to the first reference voltage) of the first operational amplifier OPA1 by controlling the magnitude of the analog amount output from the DAC1, and the voltage feedback unit responds. Adjust the voltage value of the target voltage.

  Further, the second adapter may include a current feedback unit (corresponding to the current feedback unit 13). As shown in FIG. 23, the current feedback unit may include a resistor R3, a galvanometer, a resistor R4, a resistor R5, and a second operational amplifier OPA2.

  Specifically, the resistor R3 is a current detection resistor. The galvanometer detects the current flowing through the resistor R3, obtains the output current of the second adapter, converts the output current of the second adapter into a corresponding voltage value, and outputs it to both ends of the resistors R4 and R5. By performing the voltage division, a second voltage is obtained. The second voltage is configured to indicate the magnitude of the output current of the second adapter. The opposite-phase input terminal of the second operational amplifier OPA2 is configured to receive the second voltage. The in-phase input terminal of the second operational amplifier OPA2 is connected to the DAC2 port of the MCU via the DAC2. The MCU adjusts the voltage value of the reference voltage (corresponding to the second reference voltage) of the second operational amplifier OPA2 by controlling the magnitude of the analog amount output from the DAC2, and further controls the current feedback unit. Adjust the current value of the target current to be performed.

  The second adapter further includes a power adjustment unit (corresponding to the power adjustment unit 14). As shown in FIG. 23, the power adjustment unit may include a first diode D1, a second diode D2, a photoelectric coupling unit 234, a PWM controller, and a switch transistor Q2.

  Specifically, the first diode D1 and the second diode D2 are two diodes connected in anti-parallel, and the anodes of the first diode D1 and the second diode D2 are connected to the feedback point shown in FIG. Have been. The input of the opto-electrical coupling unit 234 is configured to receive the voltage signal at the feedback point. If the voltage at the feedback point is lower than the operating voltage VDD of the photoelectric coupling unit 234, the photoelectric coupling unit 234 starts operating to supply a feedback voltage to the FB terminal of the PWM controller. The PWM controller controls the duty ratio of the PWM signal output from the PWM terminal by comparing the voltage at the CS terminal with the voltage at the FB terminal. When the voltage signal output from the first operational amplifier OPA1 (that is, the above-described voltage feedback signal) is 0, or when the voltage signal output from the second operational amplifier OPA2 (that is, the above-described current feedback signal) is 0, , FB terminals are stable, and the duty ratio of the PWM control signal output from the PWM terminal of the PWM controller is kept constant. The PWM terminal of the PWM controller is connected to the primary winding of the transformer T1 via the switch transistor Q2, and is configured to control the output voltage and output current of the second adapter. When the duty ratio of the control signal transmitted from the PWM terminal is constant, the output voltage and the output current of the second adapter are kept stable.

  Further, the second adapter of FIG. 23 further includes a first adjustment unit and a second adjustment unit. As shown in FIG. 23, the first adjustment unit includes an MCU (corresponding to the control unit) and a DAC1, adjusts a voltage value of a reference voltage of the first operational amplifier OPA1, and further sets a target voltage corresponding to the voltage feedback unit. Is configured to adjust the voltage value. The second adjustment unit includes an MCU (corresponding to the control unit) and DAC2, is configured to adjust a reference voltage of the second operational amplifier OPA2, and further adjust a current value of a target current corresponding to the current feedback unit. ing.

  The MCU may adjust the voltage value of the target voltage and the current value of the target current based on the currently used charging mode of the second adapter. For example, when charging in the constant voltage mode, the second adapter can adjust the target voltage to a voltage corresponding to the constant voltage mode and adjust the target current to the maximum output current allowed in the constant voltage mode. As another example, when charging in the constant current mode, the second adapter adjusts the target current to a current corresponding to the constant current mode, and adjusts the target voltage adjustment to the maximum output voltage allowed in the constant current mode. be able to.

  For example, in the constant voltage mode, the target voltage can be adjusted to a fixed voltage value (for example, 5V). On the primary side, a primary filter unit is provided (in the embodiment of the present invention, the primary filter unit is removed to reduce the volume of the second adapter, since the primary filter unit uses a large volume of liquid aluminum electrolytic capacitor). In consideration of the fact that the load capacity of the secondary filter unit 233 is limited, the target current can be set to 500 mA or 1 A. The second adapter first adjusts the output voltage to 5V based on the voltage feedback loop. When the output current of the second adapter reaches the target current, the current feedback loop controls so that the output current of the second adapter does not exceed the target current. In the constant current mode, the target current can be set to 4A and the target voltage can be set to 5V. Since the output current of the second adapter is a pulsating direct current, the peak current of the pulsating direct current can be maintained at 4 A by performing a peak clipping process on a current higher than 4 A by a current feedback loop. When the output voltage of the second adapter exceeds the target voltage, a voltage feedback loop controls the output voltage of the second adapter so as not to exceed the target voltage.

  Further, the MCU may include a communication interface. The MCU performs bidirectional communication with a device to be charged (for example, a terminal) via the communication interface, and can control a charging process of the second adapter. Taking the case where the charging interface is a USB interface as an example, the communication interface may be the USB interface. Specifically, the second adapter charges a device to be charged (for example, a terminal) with a power line in the USB interface, and charges the device (for example, a terminal) with a data line (D + and / or D-) in the USB interface. And can communicate.

  Further, the photoelectric coupling unit 234 is connected to the voltage adjusting unit, and can stably maintain the operation voltage of the optocoupler. As shown in FIG. 23, the voltage stabilizing unit (voltage adjusting unit) in the embodiment of the present invention can be realized by a low dropout regulator (Low Dropout Regulator, LDO).

  FIG. 23 illustrates an example in which the control unit (MCU) adjusts the reference voltage of the first operational amplifier OPA1 by the DAC1. Such a method of adjusting the reference voltage corresponds to the method of adjusting the reference voltage shown in FIG. 4, but the embodiment of the present invention is not limited to this, and for example, any of the methods shown in FIGS. Such a method of adjusting the reference voltage can be used, and a detailed description is omitted here for brevity.

  FIG. 23 illustrates an example in which the control unit (MCU) adjusts the reference voltage of the second operational amplifier OPA2 by the DAC2. Such a method of adjusting the reference voltage corresponds to the method of adjusting the reference voltage shown in FIG. 12, but the embodiment of the present invention is not limited to this. For example, any of the methods shown in FIGS. Such a method of adjusting the reference voltage can be used, and a detailed description is omitted here for brevity.

  The embodiment of the device according to the present invention has been described above in detail with reference to FIGS. Hereinafter, a method embodiment according to an embodiment of the present invention will be described in detail with reference to FIG. It should be noted that the description of the method corresponds to the description of the apparatus, and thus, for the sake of brevity, duplicate description will be appropriately omitted.

  FIG. 24 is a flowchart of the charging control method according to the embodiment of the present invention. The charging method in FIG. 24 can be executed by the second adapter 10 described above. The charging method may include the following operations 2410-2440.

  At 2410, an output voltage and an output current of the second adapter are obtained by converting the input alternating current.

  At 2420, a voltage feedback signal indicating whether the output voltage of the second adapter has reached a predetermined target voltage is generated by detecting the output voltage of the second adapter.

  At 2430, a current feedback signal indicating whether the output current of the second adapter has reached a predetermined target current is generated by detecting the output current of the second adapter.

  At 2440, if the voltage feedback signal indicates that the output voltage of the second adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the second adapter has reached the target current, Stabilizes output voltage and output current.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode, which is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is a maximum output current of the second adapter allowed in the constant voltage mode. The method of FIG. 24 may further include adjusting the output voltage of the second adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal. At 2440, if the current feedback signal indicates that the output current of the second adapter has reached the maximum output current allowed in the constant voltage mode of the second adapter, the output current of the second adapter is changed to the constant voltage mode of the second adapter. May be controlled so as not to exceed the maximum output current allowed in the above.

  Optionally, in some embodiments, the second adapter includes a primary rectifier unit, a transformer, a secondary rectifier unit, and a secondary filter unit. The primary rectifier unit outputs a voltage having a pulsating waveform directly to the transformer.

  Optionally, in some embodiments, the maximum output current allowed in the constant voltage mode of the second adapter is determined based on the capacitance of the capacitor in the secondary filter unit.

  Optionally, in some embodiments, the second adapter is operable in a second charging mode, which is a constant current mode. In the constant current mode, the target voltage is a maximum output voltage allowed in the constant current mode of the second adapter, and the target current is a current corresponding to the constant current mode. The method of FIG. 24 further includes adjusting the output current of the second adapter to a current corresponding to the constant current mode based on the current feedback signal. At 2440, if the voltage feedback signal indicates that the output voltage of the second adapter has reached the maximum output voltage allowed in the constant current mode of the second adapter, the output voltage of the second adapter is changed to the constant current mode of the second adapter. Is controlled so as not to exceed the maximum output voltage allowed by.

  Optionally, in some embodiments, the method of FIG. 24 further comprises adjusting the value of the target voltage.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode and a second charging mode. Adjusting the value of the target voltage may include adjusting the value of the target voltage based on the currently used first charging mode or second charging mode of the second adapter.

  Optionally, in some embodiments, generating the voltage feedback signal by detecting the output voltage of the second adapter comprises: sampling the output voltage of the second adapter to obtain a first voltage; The method may include comparing the first voltage with the first reference voltage, and generating a voltage feedback signal based on a result of the comparison between the first voltage and the first reference voltage. Adjusting the value of the target voltage includes adjusting the value of the target voltage by adjusting the value of the first reference voltage.

  Optionally, in some embodiments, the value of the first reference voltage is adjusted by a first DAC.

  Optionally, in some embodiments, the value of the first reference voltage is adjusted by an RC filter unit.

  Optionally, in some embodiments, the value of the first reference voltage is adjusted by a digital potentiometer.

  Optionally, in some embodiments, generating the voltage feedback signal by detecting the output voltage of the second adapter divides the output voltage of the second adapter based on the predetermined voltage division ratio, Generating a first voltage, comparing the first voltage with a first reference voltage, and generating a voltage feedback signal based on a comparison result between the first voltage and the first reference voltage may also be included. Good. Adjusting the value of the target voltage includes adjusting the voltage value of the target voltage by adjusting the voltage division ratio.

  Optionally, in some embodiments, the partial pressure ratio is a digital potentiometer partial pressure ratio.

  Optionally, in some embodiments, the method of FIG. 24 may include adjusting a current value of the target current.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode and a second charging mode. Adjusting the current value of the target current may include adjusting the current value of the target current based on the currently used first charging mode or second charging mode of the second adapter.

  Optionally, in some embodiments, generating the current feedback signal by detecting the output current of the second adapter comprises sampling the output current of the second adapter and measuring the output current of the second adapter. Obtaining a second voltage indicating the magnitude, comparing the second voltage with the second reference voltage, generating a current feedback signal based on a comparison result of the second voltage and the second reference voltage; May be included. Adjusting the current value of the target current may include adjusting the current value of the target current by adjusting the voltage value of the second reference voltage.

  Optionally, in some embodiments, the value of the second reference voltage is adjusted by a second DAC.

  Optionally, in some embodiments, the value of the second reference voltage is adjusted by an RC filter unit.

  Optionally, in some embodiments, the value of the second reference voltage is adjusted by a digital potentiometer.

  Optionally, in some embodiments, generating the current feedback signal by detecting the output current of the second adapter comprises: sampling the output current of the second adapter; Obtaining a third voltage indicating the magnitude of the second voltage, comparing the second voltage with the second reference voltage, and generating a current feedback signal based on a result of the comparison between the second voltage and the second reference voltage. May be included. Adjusting the current value of the target current may include adjusting the current value of the target current by adjusting the voltage division ratio.

  Optionally, in some embodiments, the partial pressure ratio is a digital potentiometer partial pressure ratio.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode and a second charging mode. In the second adapter, a charging speed of the device to be charged in the second charging mode is faster than a charging speed of the device to be charged in the first charging mode. The method of FIG. 24 includes controlling the output of the second adapter in the second charging mode by performing bidirectional communication with the device to be charged in the process of connecting the second adapter to the device to be charged. May be further included.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing bi-directional communication with the device to be charged comprises: The communication may include negotiating a charging mode between the second adapter and the device to be charged.

  Optionally, in some embodiments, negotiating a charging mode between the second adapter and the device to be charged by performing two-way communication with the device to be charged includes: Transmitting a first instruction for inquiring whether or not to enable the second charging mode to the charged device; and transmitting the second charged mode transmitted from the charged device to the charged device. Receiving the reply instruction of the first instruction indicating whether or not to agree to enable the operation, and agreeing to enable the device to be charged to enable the second charging mode. Charging the device to be charged in a charging mode.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing two-way communication with the device to be charged comprises: To determine the charging voltage for charging the charged device output from the second adapter in the second charging mode, and that the voltage value of the target voltage is equal to the voltage in the second charging mode. The method may include adjusting a voltage value of the target voltage so as to be equal to a charging voltage output from the second adapter for charging the charged device.

  Optionally, in some embodiments, performing bi-directional communication with the device to be charged allows the charging voltage output from the second adapter in the second charging mode to charge the device to be charged to be charged. Determining includes transmitting a second instruction to the device to be charged as to whether the output voltage of the second adapter matches the current voltage of the battery of the device to be charged; Receiving a response instruction of the second instruction transmitted from the second adapter indicating whether the output voltage of the second adapter matches the current voltage of the battery or is higher or lower than the current voltage of the battery. May be included.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing two-way communication with the device to be charged comprises: To determine the charging current for charging the device to be charged, which is output from the second adapter in the second charging mode, and that the current value of the target current is equal to the current value in the second charging mode. Adjusting the current value of the target current so as to be equal to the charging current output from the second adapter for charging the device to be charged.

  Optionally, in some embodiments, performing bi-directional communication with the device to be charged provides a charging current output from the second adapter in the second charging mode for charging the device to be charged. Determining includes transmitting a third instruction to the device to be charged that queries the maximum charging current currently supported by the device to be charged, and transmitting the third instruction to the device to be charged, the third instruction being transmitted from the device to be charged. Receiving a response instruction of the third instruction indicating a maximum charging current supported, and outputting from the second adapter in the second charging mode based on a maximum charging current currently supported by the charged device; And determining a charging current for charging the charged device. It may be.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing two-way communication with the device to be charged comprises charging in the second charging mode. The process may include adjusting the output current of the second adapter by performing bidirectional communication with the device to be charged.

  Optionally, in some embodiments, adjusting the output current of the second adapter by performing two-way communication with the device to be charged comprises: interrogating a current voltage of a battery of the device to be charged. Transmitting a fourth instruction to the device to be charged, receiving a response instruction of the fourth instruction indicating a current voltage of the battery transmitted from the second adapter, and transmitting a current voltage of the battery. Adjusting the output current of the second adapter based on

  Optionally, in some embodiments, the second adapter includes a charging interface. The second adapter performs bidirectional communication with the device to be charged via a data line in the charging interface.

  Optionally, in some embodiments, the second adapter is operable in a second charging mode, which is a constant current mode, wherein the output current of the second adapter is a pulsating DC. is there.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode, which is a constant voltage mode. The second adapter includes a secondary filter unit. In the method of FIG. 24, in the first charging mode, by controlling the secondary filter unit to operate, the voltage value of the output voltage of the second adapter is kept constant, and the second charging mode is maintained. In the above, the method may further include controlling the operation of the secondary filter unit to stop so that the output current of the second adapter becomes a pulsating DC.

  Optionally, in some embodiments, the second adapter is operable in a second charging mode, which is a constant current mode, wherein the output current of the second adapter is AC in the second charging mode. .

  Optionally, in some embodiments, the second adapter is operable in a second charging mode, wherein the output voltage and output current of the second adapter are in the second charging mode. Directly applied to both ends of the battery, the battery is directly charged.

  Optionally, in some embodiments, the second adapter is a second adapter configured to charge a mobile charged device.

  Optionally, in some embodiments, the second adapter includes a control unit, which is an MCU, configured to control a charging process.

  Optionally, in some embodiments, the second adapter includes a charging interface that is a USB interface.

  It is understood that the terms “first adapter” and “second adapter” in the text are merely for convenience of description and do not limit the specific type of the adapter according to the embodiment of the present invention. Should be.

  As will be appreciated by those skilled in the art, the various units and algorithm steps described in connection with the embodiments disclosed herein may be implemented in electronic hardware or a combination of computer software and electronic hardware. It is possible to Whether these functions are implemented in hardware or software depends on the particular application of the technical means and design constraints. Those skilled in the art will be able to implement the above functions using different methods for each particular application; however, this implementation should not be considered beyond the scope of the present invention.

  Also, as will be appreciated by those skilled in the art, for convenience and simplicity of description, reference may be made to processes corresponding to the above method embodiments for detailed operating processes of the systems, devices, and units. Therefore, it will not be described again.

  In some embodiments provided in the present application, it should be considered that the disclosed systems, devices, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely exemplary. For example, a unit division is simply a logical function division, and may be another division in an actual implementation. For example, multiple units or components can be combined or incorporated into another system, or some features are ignored or not performed. Further, the mutual coupling or direct coupling or communication connection shown or described can be realized through some interface, and the indirect coupling or communication connection of the device or unit can be electrical, mechanical, or Other forms may be used.

  Units described as separate members may or may not be physically separate. The member as a display unit may be a physical unit or may not be a physical unit, that is, it may be located at one location or distributed over a plurality of network units. . Some or all of the units may be selected according to actual needs in order to achieve the purpose of the technical means according to the embodiment.

  Further, each functional unit in each embodiment of the present invention may be incorporated in one processing unit, may exist physically alone, or two or more units may be incorporated in one unit. Good.

  If the functionality is implemented in a software functional unit and sold or used as a stand-alone product, the software may be stored on a computer-readable storage medium. Based on such an understanding, the gist of the technical means of the present invention, a part contributing to the prior art, or a part of the technical means may be realized by a software product. The computer software product is stored on a storage medium and includes a number of commands for causing a computer (such as a personal computer, server, or network device) to perform all or some of the steps of the method according to various embodiments of the invention. May be included. The storage medium can store a program code such as a USB memory, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disk. Any medium may be included.

  Although the embodiments of the present invention have been illustrated and described above, it is to be understood by those skilled in the art that the above embodiments are not limited to the examples, and cannot be interpreted to limit the present invention. Various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention.

Claims (25)

An adapter,
A power conversion unit configured to obtain an output voltage and an output current of the adapter by converting an input alternating current;
An input terminal is connected to the power conversion unit, and is configured to generate a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage by detecting an output voltage of the adapter. Voltage feedback unit,
An input terminal is connected to the power conversion unit, and is configured to generate a current feedback signal indicating whether or not the output current of the adapter has reached a predetermined target current by detecting an output current of the adapter. A current feedback unit, and an input terminal is connected to an output terminal of the voltage feedback unit and an output terminal of the current feedback unit, and an output terminal is connected to the power conversion unit, and outputs the voltage feedback signal and the current feedback signal. Receiving, if the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the adapter has reached the target current, the adapter To stabilize the output voltage and output current of Power regulation unit formed,
An adapter comprising:   The adapter of claim 1, wherein the adapter further comprises a first adjustment unit connected to the voltage feedback unit and configured to adjust the value of the target voltage. The voltage feedback unit comprises:
An input end connected to the power conversion unit, a first voltage division unit configured to divide the output voltage of the adapter based on a predetermined voltage division ratio to generate a first voltage;
An input terminal is connected to an output terminal of the first voltage dividing unit, compares the first voltage with a first reference voltage, and sets the voltage based on a comparison result between the first voltage and the first reference voltage. A voltage comparison unit configured to generate a feedback signal;
The said 1st adjustment unit is connected to the said 1st voltage division unit, The value of the said target voltage is adjusted by adjusting the division | segmentation ratio of the said 1st voltage division unit, The claim 2 characterized by the above-mentioned. Adapter. The first partial pressure unit includes a first digital potentiometer,
The first adjustment unit includes a first control unit,
The first digital potentiometer has a high potential end connected to the power conversion unit, a low potential end grounded, and an output end connected to an input end of the voltage comparison unit,
4. The adapter according to claim 3, wherein the first control unit is connected to a control end of the first digital potentiometer, and is configured to adjust a division ratio of the first digital potentiometer. 5.   The voltage comparison unit includes a first operational amplifier, the first operational amplifier having an opposite-phase input terminal receiving the first voltage, an in-phase input terminal receiving the first reference voltage, and an output for generating the voltage feedback signal. The adapter according to claim 3, further comprising an end.   The adapter is operable in a first charging mode and a second charging mode, and the first adjustment unit is configured to control the target voltage based on the currently used first or second charging mode of the adapter. The adapter according to any one of claims 2 to 5, wherein adjustment of the value is performed.   The method of claim 3, wherein the adapter further comprises a second adjustment unit connected to the current feedback unit and configured to adjust a current value of the target current. The described adapter. The current feedback unit comprises:
A current sampling unit having an input connected to the power conversion unit and configured to sample an output current of the adapter to obtain a third voltage indicating a magnitude of an output current of the adapter;
An input terminal connected to an output terminal of the current sampling unit, configured to divide a third voltage based on a predetermined voltage division ratio to generate a second voltage;
An input terminal is connected to an output terminal of the second voltage dividing unit, compares the second voltage with a second reference voltage, and outputs the current based on a comparison result between the second voltage and the second reference voltage. A current comparison unit configured to generate a feedback signal;
8. The device according to claim 7, wherein the second adjusting unit is connected to the voltage dividing unit, and adjusts a current value of the target current by adjusting a voltage dividing ratio of the second voltage dividing unit. 9. adapter. The second partial pressure unit includes a second digital potentiometer,
The second adjustment unit includes a second control unit,
The second digital potentiometer has a high potential terminal connected to an output terminal of the current sampling unit, a low potential terminal grounded, and an output terminal connected to an input terminal of the voltage comparison unit.
9. The adapter according to claim 8, wherein the second control unit is connected to a control end of the second digital potentiometer and is configured to adjust a division ratio of the second digital potentiometer.   The current comparison unit includes a second operational amplifier, the second operational amplifier having an inverting input terminal receiving the second voltage, an in-phase input terminal receiving the second reference voltage, and an output for generating the current feedback signal. 10. The adapter according to claim 8 or claim 9, comprising an end.   The adapter is operable in a first charging mode and a second charging mode, and the second adjustment unit is configured to control the target current based on the currently used first or second charging mode of the adapter. The adapter according to any one of claims 8 to 10, wherein the current value is adjusted. The adapter is operable in a first charging mode that is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the constant voltage of the adapter. The maximum output current allowed in the mode,
The power adjustment unit adjusts the output voltage of the adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal, and the current feedback signal indicates that the output current of the adapter is the constant voltage mode of the adapter. When indicating that the maximum output current allowed in is reached, it is configured to control so that the output current of the adapter does not exceed the maximum output current allowed in the constant voltage mode of the adapter. The adapter according to any one of claims 1 to 11, wherein the adapter is characterized in that:   The power conversion unit includes a primary rectifier unit, a transformer, a secondary rectifier unit, and a secondary filter unit, wherein the primary rectifier unit directly outputs a pulsating waveform voltage to the transformer. The adapter according to claim 12, wherein:   14. The adapter according to claim 13, wherein a maximum output current of the adapter allowed in the constant voltage mode is determined based on a capacitance of a capacitor in the secondary filter unit. The adapter is operable in a second charging mode that is a constant current mode. In the constant current mode, the target voltage is a maximum output voltage of the adapter allowed in the constant current mode, and the target current is A current corresponding to the constant current mode,
The power adjustment unit adjusts the output current of the adapter to a current corresponding to the constant current mode based on the current feedback signal, and the voltage feedback signal indicates that the output voltage of the adapter is the constant current mode of the adapter. When indicating that the maximum output voltage allowed in is reached, it is configured to control so that the output voltage of the adapter does not exceed the maximum output voltage allowed in the constant current mode of the adapter. The adapter according to any one of claims 1 to 14, wherein the adapter is characterized in that:   The adapter further includes a charging interface, the adapter performs bidirectional communication with the device to be charged via a data line of the charging interface, and the adapter is operable in a first charging mode and a second charging mode. Wherein the charging speed for the device to be charged in the second charging mode is faster than the charging speed for the device to be charged in the first charging mode, the adapter includes a control unit, and the adapter is connected to the device to be charged. The process of claim 1, wherein the control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged. Adapter described in section. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
The adapter of claim 16, wherein the control unit includes negotiating a charging mode between the adapter and the device to be charged by performing bidirectional communication with the device to be charged. . The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
The control unit performs bidirectional communication with the device to be charged, thereby determining a charging voltage for charging the device to be charged output from the adapter in the second charging mode;
The control unit adjusts the voltage value of the target voltage such that the voltage value of the target voltage is equal to the charging voltage output from the adapter in the second charging mode for charging the device to be charged. 18. The adapter according to claim 16, wherein the adapter comprises: The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
The control unit performs bidirectional communication with the device to be charged, thereby determining a charging current for charging the device to be charged output from the adapter in the second charging mode;
The control unit adjusts the current value of the target current such that the current value of the target current is equal to the charging current output from the adapter in the second charging mode for charging the device to be charged. The adapter according to any one of claims 16 to 18, comprising: The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
17. The process of charging in the second charging mode, wherein the control unit includes adjusting the output current of the adapter by performing bidirectional communication with the device to be charged. 20. The adapter according to any one of items 19 to 19. A charge control method used for the adapter,
Converting the input alternating current to obtain an output voltage and an output current of the adapter;
By detecting the output voltage of the adapter, generating a voltage feedback signal indicating whether the output voltage of the adapter has reached a predetermined target voltage,
By detecting the output current of the adapter, generating a current feedback signal indicating whether the output current of the adapter has reached a predetermined target current, and the voltage feedback signal is the output voltage of the adapter Stabilizing the output voltage and the output current of the adapter, when indicating that the target voltage has been reached, or when the current feedback signal indicates that the output current of the adapter has reached the target current,
A charging control method comprising: Generating a voltage feedback signal by detecting an output voltage of the adapter,
Dividing the output voltage of the adapter based on a predetermined voltage division ratio to generate a first voltage;
Comparing the first voltage with a first reference voltage;
Generating the voltage feedback signal based on a result of the comparison between the first voltage and the first reference voltage,
The charge control method includes:
22. The charging control method according to claim 21, further comprising adjusting the value of the target voltage by adjusting the voltage division ratio. Generating a current feedback signal by detecting an output current of the adapter,
Sampling the output current of the adapter to obtain a third voltage indicative of the magnitude of the output current of the adapter;
Dividing the third voltage based on a predetermined voltage division ratio to generate a second voltage;
Comparing the second voltage with a second reference voltage;
Generating the current feedback signal based on a comparison result between the second voltage and the second reference voltage,
The charge control method includes:
The charging control method according to claim 21, further comprising adjusting a current value of the target current by adjusting the voltage division ratio. The adapter is operable in a first charging mode and a second charging mode;
The charge control method includes:
22. The method of claim 21, further comprising adjusting a value of the target current and / or a value of the target voltage based on a currently used first charging mode or a second charging mode of the adapter. 24. The charging control method according to any one of claims 23 to 23. The adapter is operable in a first charging mode that is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the constant voltage of the adapter. The maximum output current allowed in the mode,
The charging control method includes:
Further comprising adjusting an output voltage of the adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal,
The adapter output voltage if the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the adapter has reached the target current. And stabilizing the output current
If the current feedback signal indicates that the output current of the adapter has reached a maximum output current allowed in the constant voltage mode of the adapter, the output current of the adapter is allowed in the constant voltage mode of the adapter. The charging control method according to any one of claims 21 to 24, further comprising controlling so as not to exceed a maximum output current.