CN114696437A

CN114696437A - Charging control circuit, charging control method, charger, and storage medium

Info

Publication number: CN114696437A
Application number: CN202210330594.7A
Authority: CN
Inventors: 张建庭
Original assignee: Anker Innovations Co Ltd
Current assignee: Anker Innovations Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-01

Abstract

The application discloses a charging control circuit, a charging control method, a charger and a storage medium. The charging control circuit comprises a controller, a flyback circuit and a multi-path charging circuit. Each charging circuit in the multi-path charging circuit comprises a bypass circuit, a voltage converter, a protocol chip and a charging port, the flyback circuit is connected to the charging power supply, the charging voltage required by the device to be charged is directly output to the device to be charged through the bypass circuit under the control of the controller, the output voltage of the flyback circuit does not need to be converted by the voltage converter and then output to the device to be charged, and therefore the power supply energy conversion efficiency from the power supply to the device to be charged is improved.

Description

Charging control circuit, charging control method, charger, and storage medium

Technical Field

The present disclosure relates to the field of charging technologies, and in particular, to a charging control circuit, a charging control method, a charger, and a storage medium.

Background

With the popularization of Power Delivery (PD) protocol in portable electronic products, more and more users begin to select a PD charger with dual or multiple charging ports.

In the related art, in the process of charging an electronic product by a PD charger, firstly, a high-voltage ac mains supply needs to be converted into a predetermined dc voltage, then the predetermined dc voltage is converted into a charging voltage required by the electronic product according to the charging voltage required by the electronic product, and then the electronic device is charged.

Disclosure of Invention

The embodiment of the application provides a charging control circuit, a charging control method, a charger and a storage medium, which can effectively solve the problem that the conversion efficiency of the PD charger is low due to the fact that the existing charging circuit is subjected to two-stage voltage conversion.

In a first aspect, an embodiment of the present application provides a charging control circuit, which includes a controller, a flyback circuit, and a multi-path charging circuit. The flyback circuit is connected with the controller and used for converting power supply voltage into charging voltage required by the equipment to be charged so as to charge the equipment to be charged;

the charging circuit comprises a bypass circuit, a voltage converter, a protocol chip and a charging port, wherein the charging circuit comprises a plurality of paths of charging circuits, each path of charging circuit is connected with the corresponding flyback circuit so as to transmit charging voltage output by the corresponding flyback circuit to equipment to be charged;

the output of the flyback circuit has two paths, the first path is electrically connected with the charging port through a bypass circuit, and the bypass circuit is electrically connected with the controller so as to control the on-off of the bypass circuit; the second path is electrically connected with the charging port through a voltage converter and a protocol chip, and the voltage converter is electrically connected with the controller;

the protocol chip is connected with the controller and used for communicating with the equipment to be charged so as to determine the request voltage of the equipment to be charged and transmit a request voltage signal to the controller, the controller controls the flyback circuit to output the charging voltage equal to the request voltage and controls the bypass circuit to be conducted so that the charging voltage is transmitted to the equipment to be charged through the bypass circuit.

In some embodiments, the bypass circuit is a semiconductor switching device provided with a bypass control terminal connected to the controller, a bypass input terminal connected to the output terminal of the flyback circuit, and a bypass output terminal connected to the charging port;

when the flyback circuit outputs a charging voltage equal to the requested voltage, the controller controls the semiconductor switching device to be conducted, and the charging voltage is transmitted to the equipment to be charged through the semiconductor switching device.

In some embodiments, the flyback circuit includes a rectifier circuit and a transformer.

The rectifying circuit is connected with a power supply and is used for converting an alternating current signal input by the power supply into a direct current signal;

the transformer is connected with the rectifying circuit and the multi-path charging circuit and is used for converting the direct current signal into a charging voltage equal to the request voltage.

In some embodiments, the transformer includes a primary winding and a secondary winding coupled to the primary winding, the secondary winding is connected in series with a switching tube and a capacitor, and the switching tube is used for controlling the capacitor to store and release energy; alternatively, the first and second electrodes may be,

the transformer comprises a primary winding and a secondary winding coupled with the primary winding, wherein the secondary winding is connected with a diode and a capacitor in series, and the diode is used for controlling the capacitor to store and release energy.

In a second aspect, an embodiment of the present application provides a charging control method, where the charging control method is implemented based on the charging control circuit, and the charging control method includes:

receiving a first request voltage sent by the protocol chip of the first path of the charging circuit;

controlling the flyback circuit to output a charging voltage equal to the first request voltage;

and controlling the bypass circuit of the first path to be conducted so as to output the charging voltage through the bypass circuit of the first path, and controlling the voltage converter of the first path to be closed after a first preset time.

In some embodiments, after the step of controlling the bypass circuit of the first path to be turned on to output the charging voltage through the bypass circuit of the first path, and controlling the voltage converter of the first path to be turned off after a first preset time, the method further includes:

when a second request voltage sent by the protocol chip of the second path of charging circuit is received, judging whether the second request voltage is equal to the first request voltage or not;

when the voltage of the first path of the charging circuit is equal to the voltage of the second path of the charging circuit, controlling the bypass circuit of the second path of the charging circuit to be conducted, and controlling the voltage converter of the second path of the charging circuit to be closed after second preset time;

and when the voltage converter of the second path of the charging circuit is not equal to the first request voltage, keeping the voltage converter of the second path of the charging circuit switched on, outputting the charging voltage equal to the second request voltage, and keeping the bypass circuit of the second path of the charging circuit switched off.

In some embodiments, the step of controlling the flyback circuit to output a charging voltage equal to the first requested voltage comprises:

judging whether the preset output voltage of the flyback circuit is equal to the first request voltage or not;

when the preset output voltage is equal to the preset output voltage, outputting the preset output voltage as the charging voltage;

and when the preset output voltage is not equal to the first request voltage, adjusting the preset output voltage to be equal to the first request voltage and outputting the first request voltage.

In some embodiments, the step of receiving the first request voltage sent by the protocol chip of the first path charging circuit is preceded by:

before the step of receiving the first request voltage sent by the protocol chip of the first path of the charging circuit, the method includes:

controlling the flyback circuit to output a preset output voltage, and controlling the voltage converter of the first path to be closed and the bypass circuit of the first path to be closed;

when receiving a connection signal sent by a first path of protocol chip of the first path of charging circuit, controlling the voltage converter of the first path to be switched on and output a preset charging voltage, and controlling the protocol chip of the first path to broadcast a message; the message comprises multiple preset charging voltages to be selected, the equipment to be charged confirms that the protocol chip of the first path is in a connection state according to the preset charging voltages and receives the message, one charging voltage is selected from the multiple charging voltages to be selected in the message to be used as the first request voltage, and the first request voltage is sent to the protocol chip of the first path so that the protocol chip of the first path can forward the first request voltage.

In a third aspect, an embodiment of the present application provides a charger including the above charging control circuit, or performing the above charging control method.

In a fourth aspect, an embodiment of the present application provides a storage medium, where the storage medium stores a plurality of instructions, and the instructions are adapted to be loaded by a processor and execute the steps of the charging control method described above.

Based on the charging control circuit in the embodiment of the application, under the control of the controller, the flyback circuit is connected to the power supply and directly outputs the charging voltage required by the device to be charged to the device to be charged through the bypass circuit, the output voltage of the flyback circuit does not need to be converted by the voltage converter and then is output to the device to be charged, and therefore the power supply energy conversion efficiency from the power supply to the device to be charged is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a block diagram of a charge control circuit according to an embodiment of the present application;

FIG. 2 is a circuit diagram of a charge control circuit according to an embodiment of the present application;

fig. 3 is a circuit diagram of a flyback circuit according to an embodiment of the present application;

fig. 4 is a schematic flowchart of a charging control method according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a charging control method according to another embodiment of the present application;

fig. 6 is a schematic flowchart of a charging control method according to another embodiment of the present application;

fig. 7 is a flowchart illustrating a charging control method according to still another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The embodiment of the present application provides a charging control circuit, please refer to fig. 1-2, the charging control circuit includes a controller 10, a flyback circuit 20 and a plurality of charging circuits D, only two charging circuits D are shown in fig. 1, and are marked as a first charging circuit 30 and a second charging circuit 40, it should be understood that the charging control circuit in the present application may include one flyback circuit 20 and a plurality of charging circuits D, and the plurality of charging circuits D are connected to the same flyback circuit 20.

The flyback circuit 20 has a controlled terminal 20a, a power input terminal 20b and a power output terminal 20c, the controlled terminal 20a is connected to the controller 10, and the controller 10 controls the flyback circuit 20 through the controlled terminal 20 a. For example, the controller 10 can control the voltage VBUS output by the flyback circuit 20 to meet the charging requirement of the device to be charged (not shown in the figure).

The power input terminal 20b is used for accessing a charging power supply, and it should be noted that the charging power supply in the flyback circuit 20 may be ac mains power. The flyback circuit 20 is used to convert the ac signal to a voltage VBUS, the magnitude of which is controlled by the controller 10.

The connection relationship between each component in each charging circuit in the multi-path charging circuit D is the same, and the first path charging circuit 30 is taken as an example for description.

The first path charging circuit 30 includes a bypass circuit 31, a voltage converter 32, a protocol chip 33, and a charging port 34. The bypass circuit 31 has a bypass control terminal 31a connected to the controller 10, a bypass input terminal 31b connected to the power supply output terminal 20c, and a bypass output terminal 31c connected to the charging port 34. It can be understood that the controller 10 is connected to the bypass control terminal 31a to control the bypass circuit 31 to turn on and off, so as to control whether the voltage VBUS output by the flyback circuit 20 is transmitted to the charging port 34 through the bypass circuit 31. Specifically, the controller 10 may control the bypass circuit 31 to be turned on, so that the voltage VBUS output by the flyback circuit 20 is controlled to be transmitted to the charging port 34 through the bypass circuit 31, and since the device to be charged is connected to the charging port 34, the voltage VBUS output by the flyback circuit 20 may be directly charged to the device to be charged through the bypass circuit 31; the controller 10 can also control the bypass circuit 31 to be turned off, so as to control the voltage VBUS output by the flyback circuit 20 not to be connected to the charging port 34 through the bypass circuit 31.

The voltage converter 32 has a conversion control terminal 32a, a conversion input terminal 32b and a conversion output terminal 32c, wherein the conversion control terminal 32a is connected to the controller 10, the conversion input terminal 32b is connected to the power output terminal 20c, and the conversion output terminal 32c is connected to the charging port 34. The controller 10 can control the voltage converter 32 to be turned on or off through the conversion control terminal 32a, and can also control the voltage output by the voltage converter 32, so as to meet the requirements of different charging voltages of different devices to be charged.

The flyback circuit 20 outputs two paths, the first path is electrically connected to the charging port 34 through the bypass circuit 31, and the second path is electrically connected to the charging port 34 through the voltage converter 32 and the protocol chip 33.

Specifically, the flyback circuit 20 is electrically connected to the charging port 34 through the voltage converter 32 and the protocol chip 33. The protocol chip 33 is connected to the controller 10 and the voltage converter 32. It can be understood that, after the device to be charged is connected to the charging port 34, the controller 10 controls the voltage converter 32 to output a preset charging voltage, the charging port 34 transmits the preset charging voltage to the device to be charged, and the protocol chip 33 broadcasts a message to the device to be charged, where the message includes multiple preset charging voltages to be selected, so that after the device to be charged receives the message, one voltage is selected from the multiple charging voltages to be selected in the message as a request voltage, where the request voltage is a charging voltage expected by the device to be charged, so that after the protocol chip 33 acquires the request voltage of the device to be charged, the request voltage of the device to be charged is fed back to the controller 10.

The charging port 34 is used for electrically connecting to the device to be charged, and the charging port 34 is connected to the bypass output terminal 31c and the switching output terminal 32c at the same time. It is understood that the charging port 34 is connected to the power output 20c through two loops, specifically, the first loop is: flyback circuit 20-voltage converter 32-charging port 34; and a second path: flyback circuit 20-bypass circuit 31-charging port 34.

Specifically, part of the process of the charge control circuit is as follows: when a device to be charged is connected to one of the charging ports 34, the protocol chip 33 electrically connected to the charging port 34 detects that the charging port 34 is electrically connected to the device to be charged, the protocol chip 33 controls the voltage converter 32 corresponding to the charging port 34 to output a preset charging voltage (usually 5V), the charging port 34 outputs the preset charging voltage to the device to be charged, the protocol chip 33 communicates with the device to be charged to obtain a requested voltage of the device to be charged and transmit the requested voltage of the device to be charged to the controller 10, after the controller 10 receives the requested voltage, the controller 10 controls the flyback circuit 20 to output a charging voltage equal to the requested voltage of the device to be charged and controls the bypass circuit 31 to be turned on, the charging voltage output by the flyback circuit 20 is transmitted to the charging port 34 connected to the device to be charged through the bypass circuit 31, and when the voltage VBUS output by the flyback circuit 20 can be stably transmitted to the device to be charged through the bypass circuit 31, the controller 10 controls the voltage converter 32 to turn off, so as to avoid the phenomenon of charge interruption (i.e. the phenomenon of interruption of the charging process of the device to be charged) caused by turning off the voltage converter 32 when the charging voltage output by the bypass circuit 31 is not stable.

In summary, in the embodiment of the present application, the voltage VBUS output by the flyback circuit 20 does not need to be converted by the voltage converter 32, but the voltage VBUS output by the flyback circuit 20 is adjusted to be the same as the requested voltage of the device to be charged, and the voltage VBUS is directly output to the device to be charged through the bypass circuit 31 for charging, so that the process of converting the voltage VBUS by the voltage converter 32 is omitted, and the energy conversion efficiency of the charging control circuit can be improved.

In order to facilitate the controller 10 to control the on/off of the bypass circuit 31, the bypass circuit 31 may be a semiconductor switch device having a bypass control terminal 31a connected to the controller 10, a bypass input terminal 31b connected to the power output terminal 20c, and a bypass output terminal 31c connected to the charging port 34; wherein, when the flyback circuit 20 outputs a charging voltage equal to the requested voltage, the controller 10 controls the semiconductor switching device to be turned on, and the charging voltage is transmitted to the device to be charged through the semiconductor switching device.

In some embodiments, the bypass circuit 31 may also include a field effect transistor, such as a PMOS transistor or an NMOS transistor, and when the bypass circuit 31 includes a PMOS transistor, the drain of the PMOS transistor is connected to the power output terminal 20c as the bypass input terminal 31b, the source of the PMOS transistor is connected to the charging port 34 as the bypass output terminal 31c, and the gate of the PMOS transistor is connected to the bypass control terminal 31a, so that the controller 10 can control the gate of the PMOS transistor to turn on and off the PMOS transistor. When the bypass circuit 31 includes an NMOS transistor, the drain of the NMOS transistor is connected to the charging port 34 as the bypass output terminal 31c, the source of the NMOS transistor is connected to the power output terminal 20c as the bypass input terminal 31b, and the gate of the NMOS transistor is the bypass control terminal 31 a.

In order to convert the ac signal into the dc signal and convert the voltage of the dc signal, referring to fig. 2, the flyback circuit 20 includes a rectifying circuit 21 and a flyback transformer 22, and the rectifying circuit 21 is connected to the ac mains for converting the ac signal into the dc signal.

Specifically, the rectifier circuit 21 may be a diode rectifier circuit, two input ends of the diode rectifier circuit are respectively connected to the first input end N and the second input end L, that is, the alternating current signal is connected to the diode rectifier circuit through the first input end N and the second input end L, and two output ends of the diode rectifier circuit are connected to the positive input end Vin + and the negative input end Vin of the flyback transformer 22.

The flyback transformer 22 receives the dc signal output by the rectifying circuit 21 to convert the magnitude of the dc signal to output a voltage VBUS.

Referring to fig. 2, the flyback transformer 22 includes a positive input terminal Vin + and a negative input terminal Vin for receiving the dc signal output by the rectifying circuit 21, the flyback transformer 22 includes a primary winding N1 and a secondary winding N2 coupled to the primary winding N1, the primary winding N1 is connected in series to a switching tube Q1, the secondary winding N2 is connected in series to the switching tube Q2 and a capacitor C, and by controlling the on-time of the switching tube Q1, the amount of energy stored in the primary winding N1 can be controlled.

In some embodiments, the switching tube Q1 may include a transistor, the transistor is connected in series with the primary winding N1, i.e., the collector and emitter of the transistor are connected to the primary winding N1, and the controller 10 is connected to the base of the transistor to control the on/off and the conducting duration of the switching tube Q1; the switching tube Q1 may also include a field effect transistor, the drain and the source of the field effect transistor are connected to the primary winding N1, and the controller 10 is connected to the gate of the field effect transistor to control the on/off state and the on duration of the field effect transistor.

The switching tube Q2 may include a triode, the triode is connected in series with the secondary winding N2, i.e. the collector and emitter of the triode are connected to the secondary winding N2, and the controller 10 is connected to the base of the triode to control the on/off and the on duration of the switching tube Q2; the switch Q2 may also include a fet, the drain and source of which are connected to the secondary winding N2, and the controller 10 is connected to the gate of the fet to control the on/off and duration of the fet.

Specifically, referring to fig. 2, under the control of the controller 10, the switching tube Q1 is in a conducting state, and at this time, the positive output terminal Vin + -the primary winding N1-the switching tube Q1-forms a charging circuit of the flyback transformer 22, or the positive output terminal Vin + -the primary winding N1-the switching tube Q1-the negative output terminal Vin forms a charging circuit of the flyback transformer 22, and the charging circuit converts the dc signal output by the rectifying circuit 21 into magnetic energy to be stored in the primary winding N1 of the flyback transformer 22.

It should be noted that the controller 10 can control the time of the switching tube Q1 conducting according to the required voltage of the device to be charged, so as to control the amount of energy stored in the primary winding N1 of the flyback transformer 22; after that, the controller 10 controls the switching tube Q1 to be turned off, and controls the Q2 to be turned on. At this time, the secondary winding N2 of the flyback transformer 22 releases energy, and the released energy is stored in the capacitor C. Further, the controller 10 controls Q2 to turn off, discharging the capacitor C and outputting the voltage VBUS.

In some other embodiments, referring to fig. 3, the flyback transformer 22 includes a primary winding N1 and a secondary winding N2 coupled to the primary winding N1, and the secondary winding N2 may also be connected in series with a diode DB and a capacitor C. Specifically, the flyback transformer 22 includes a positive input terminal Vin + and a negative input terminal Vin, the positive input terminal Vin + is connected to the N1-1 terminal of the primary winding N1 of the flyback transformer 22, the diode DB is connected in series to the secondary winding N2, the cathode of the diode DB is connected to the N2-1 terminal of the secondary winding N2 through the capacitor C, and the N1-1 terminal and the N2-1 terminal are the same-name terminals of the flyback transformer 22. When the switching tube Q1 is turned on, the stored energy of the primary winding N1 of the flyback transformer 22 increases, and the N2-1 terminal is an anode, so that the diode DB is in a reverse cut-off state; when the switching tube Q1 is turned off, the secondary winding N2 of the flyback transformer 22 releases energy, and the diode DB is in a forward conducting state, and the energy released by the secondary winding N2 is stored in the capacitor C through the diode DB.

Referring to fig. 2, the converting input terminal 32b of the voltage converter 32 in the charging circuit 30 is connected to the capacitor C through the power output terminal 20C, the converting output terminal 32C is connected to the charging port 34, and the bypass circuit 31 is connected in parallel to the voltage converter 32, that is, there are two charging loops: the capacitor C-to-voltage converter 32-to-charge port 34 constitutes a first charging loop; the capacitor C-the bypass circuit 31-the charging port 34 constitute a second charging loop. When the controller 10 detects that the device to be charged is connected to the charging port 34, the output voltage of the conversion output terminal 32c of the voltage converter 32 is 5V (an exemplary preset charging voltage), the protocol chip 33 broadcasts a message (i.e., PDO, power data object) to the device to be charged, the message includes a plurality of preset charging voltages to be selected, such as 5V, 9V, 12V, 15V, 20V, and other charging voltage bits to be selected, the device to be charged selects one of the plurality of charging voltages to be selected as a request voltage (for example, the request voltage is 20V), and sends the request voltage to the protocol chip 33, and the protocol chip 33 forwards the request voltage to the controller 10 after acquiring the request voltage. When the controller 10 acquires the request voltage of the device to be charged at the charging port 34, the controller 10 controls the voltage VBUS output by the flyback circuit 20 to be adjusted to the request voltage required by the device to be charged, at this time, the controller 10 controls the bypass circuit 31 to be turned on, the voltage VBUS output by the flyback circuit 20 is transmitted to the charging port 34 through the bypass circuit 31 to charge the device to be charged, until the output voltage of the flyback circuit 20 can stably charge the device to be charged, and the controller 10 controls the voltage converter 32 to be turned off. That is, the voltage VBUS output by the flyback circuit 20 directly charges the device to be charged, and the process of converting the voltage required by the device to be charged by the voltage converter 32 is omitted, so that the energy conversion efficiency of the device to be charged can be improved. In some specific embodiments, the controller may include a Micro Controller Unit (MCU).

It should be noted that the energy output by the capacitor C of the flyback circuit 20 is transmitted to the power output terminal 20C to form a voltage VBUS, the energy output by the capacitor C at any time is the sum of the total energy output by the plurality of charging ports 34, and the plurality of charging circuits 30 are connected in parallel, so that the charging voltages output by each charging circuit 30 are equal, and the currents of each circuit connected to the devices to be charged may be different under the condition that the charging voltages are equal.

For convenience of describing the charging process of the charging control circuit, the following description will be made by taking the charging process of two charging circuits, i.e. the first charging circuit 30 and the second charging circuit 40, as an example:

referring to fig. 2, the first charging circuit 30 is provided with a first charging Port 34(Port1), the second charging circuit 40 is provided with a second charging Port 44(Port2), the first device to be charged can be connected to the first charging Port 34(Port1), and the second device to be charged can be connected to the second charging Port 44(Port 2). It is understood that the charging Port 34(Port1) of the first path and the charging Port 44(Port2) of the second path are only used for distinguishing different charging ports, and the specific functions realized by the two paths are the same.

After the first device to be charged is connected to the first Port 34(Port1), the first protocol chip 33 electrically connected to the first Port 34(Port1) detects that the first Port 34(Port1) is electrically connected to the first device to be charged, the controller 10 controls the first voltage converter 32 corresponding to the first Port 34(Port1) to output a preset charging voltage, the first Port 34(Port1) outputs the preset charging voltage to the first device to be charged, and then the first protocol chip 33 communicates with the first device to be charged to obtain a first request voltage of the first device to be charged and feed the first request voltage back to the controller 10.

The controller 10 controls the flyback circuit 20 to output a charging voltage equal to the first requested voltage, and at the same time, controls the bypass control terminal 31a to turn on the bypass circuit 31, and transmits the charging voltage to the first path of charging Port 34(Port1) through the bypass circuit 31, so as to charge the first device to be charged, and waits until the voltage transmitted to the first path of charging Port 34(Port1) by the flyback circuit 20 through the first path of bypass circuit 31 is stable, the controller 10 controls the first path of voltage converter 32 to turn off, and the charging voltage of the first device to be charged is provided by the flyback circuit 20 through the first path of bypass circuit 31.

Further, in the case where the first device to be charged is stably charged, the second device to be charged is connected to the charging Port 44(Port2) of the second path, the protocol chip 33 of the second path electrically connected to the charging Port 44(Port2) of the second path detects that the charging Port 44(Port2) of the second path is electrically connected to the second device to be charged, the controller 10 controls the voltage converter 42 of the second path corresponding to the charging Port 44(Port2) of the second path to output the preset charging voltage, the charging Port 44(Port2) of the second path outputs the preset charging voltage to the second device to be charged, so that the protocol chip 43 of the second path communicates with the second device to be charged to obtain the second request voltage of the second device to be charged and feed back the second request voltage to the controller 10, after the controller 10 receives the second request voltage, the controller 10 determines whether the second request voltage is equal to the first request voltage, if the second request voltage is equal to the first request voltage, the controller 10 controls the bypass control terminal 41a of the second path to turn on the bypass circuit 41 of the second path of the charging circuit 40 of the second path, and the charging voltage output by the flyback circuit 20 is transmitted to the charging Port 44(Port2) of the second path through the bypass circuit 41 of the second path for the second device to be charged, at this time, the controller 10 controls the voltage converter 42 of the second path of the charging circuit 40 of the second path to be turned off, and the charging voltage of the second device to be charged is provided by the flyback circuit 20 through the bypass circuit 41 of the second path, that is, the first charging circuit 30 charges the first device to be charged through the bypass circuit 31 of the first path, and the second charging circuit 40 charges the second device to be charged through the bypass circuit 41 of the second path, without performing voltage conversion by the voltage converter 32 of the first path or the voltage converter 42 of the second path, thereby further improving the energy conversion efficiency; it should be noted that, when the second request voltage is not equal to the first request voltage, the controller 10 controls the voltage converter 42 of the second path of the charging circuit 40 of the second path to adjust the second request voltage required for charging the second device to be charged, so as to charge the second device to be charged. In this case, the controller 10 controls the bypass circuit 41 of the second path to be in the off state, but since the bypass circuit 31 of the first path is in the on state at this time, the voltage converter 32 of the first path does not need to perform voltage conversion, and compared with a scheme in which the charging circuit 30 of the first path is charged by the voltage converter 32 of the first path, and the charging circuit 40 of the second path is charged by the voltage converter 42 of the second path, the effect of improving the energy conversion efficiency is still achieved.

It should be noted that the above charging process is only a charging process when the charging circuits are two paths, the first path of charging circuit 30 is a charging circuit to which the first device to be charged is connected first, and the second path of charging circuit 40 is a charging circuit to which the second device to be charged is connected on the basis of the connection of the first device to be charged. When the number of the charging circuits is more than three, the charging process is the same as that of the second charging circuit 40, which is not described herein.

In a second aspect, the present application provides a charging control method, referring to fig. 4, the charging control method is implemented based on the charging control circuit, and the charging control method includes:

s101, receiving a first request voltage sent by the protocol chip 33 of the first path of the charging circuit 30;

it can be understood that the first path charging circuit 30 includes a first path charging Port 34(Port1), the first device to be charged is connected to the first path charging Port 34(Port1), at this time, the first path voltage converter 32 is electrically connected to the first device to be charged, the first path protocol chip 33 provides multiple preset charging voltages to be selected to the first device to be charged in a broadcast message manner, so that the first device to be charged selects one of the multiple charging voltages to be selected as a first request voltage, the first device to be charged transmits the first request voltage to the first path protocol chip 33, and the first path protocol chip 33 forwards the first request voltage to the controller 10.

S102, controlling the flyback circuit 20 to output a charging voltage equal to the first requested voltage;

specifically, the controller 10 controls the flyback circuit 20 to adjust the output voltage VBUS so that the flyback circuit 20 outputs a charging voltage equal to the first request voltage.

S103, controlling the first path of the bypass circuit 31 to be turned on, so as to output the charging voltage through the first path of the bypass circuit 31, and controlling the first path of the voltage converter 32 to be turned off after a first preset time.

It can be understood that, when the flyback circuit 20 adjusts to output the charging voltage equal to the first requested voltage, the controller 10 controls the first path of the bypass circuit 31 of the first path of the charging circuit 30 to be turned on, the flyback circuit 20 transmits the output charging voltage to the first path of the charging Port 34(Port1) through the first path of the bypass circuit 31 to charge the first device to be charged, after the charging voltage of the first device to be charged is stabilized, that is, after a first preset time, the controller 10 controls the first path of the voltage converter 32 in the first path of the charging circuit 30 to be turned off, and then the charging voltage output by the flyback circuit 20 is transmitted to the first path of the charging Port 34(Port1) through the bypass circuit 31 to charge the first device to be charged. It should be noted that the first preset time is a waiting time before the flyback circuit 20 can stably deliver the charging voltage to the first device to be charged through the first bypass circuit 31, and the specific time duration may be determined according to an actual situation, which is not limited in this embodiment.

In this embodiment, the flyback circuit 20 is connected to the first path of charging Port 34(Port1) through the first path of bypass circuit 31, and then the charging voltage output by the flyback circuit 20 is transmitted to the first device to be charged, so as to charge the first device to be charged.

In some embodiments, after step S103, the following steps are further included:

s104, when receiving a second request voltage sent by the protocol chip 43 of a second path of the charging circuit 40, judging whether the second path request voltage is equal to the first request voltage;

specifically, referring to fig. 5, after the first path of charging Port 34(Port1) is connected to the first device to be charged, when the second device to be charged is connected to the second path of charging Port 44(Port2), the second path of protocol chip 42 communicates with the second device to be charged to obtain the second request voltage of the second device to be charged, and sends the second request voltage to the controller 10, and after the controller 10 obtains the second request voltage, since the charging voltage output by the flyback circuit 20 is equal to the first request voltage at this time, the first request voltage and the second request voltage need to be compared to determine whether to turn on the second path of bypass circuit 41.

S105, when the voltage difference is equal, controlling the bypass circuit 41 of the second path of the charging circuit 40 to be conducted, and controlling the voltage converter 42 of the second path of the charging circuit 40 to be closed after a second preset time;

specifically, when the first requested voltage is equal to the second requested voltage, the controller 10 controls the bypass circuit 41 of the second path charging circuit 40 to be turned on, and the flyback circuit 20 is connected to the charging Port 44(Port2) of the second path through the bypass circuit 41 of the second path to charge the second device to be charged. After the charging voltage of the second device to be charged is stable, that is, after the second preset time, the controller 10 controls the voltage converter 42 of the second path in the second path charging circuit 40 to turn off, and then the charging voltage output by the flyback circuit 20 is transmitted to the charging Port 44(Port2) of the second path through the bypass circuit 41 of the second path, so as to charge the second device to be charged. It should be noted that the second preset time is a waiting time before the flyback circuit 20 can stably deliver the charging voltage to the second device to be charged through the bypass circuit 41 of the second path, and the specific time duration may be determined according to an actual situation, which is not limited in this embodiment. In this embodiment, the first path charging circuit 30 charges the first device to be charged through the first path bypass circuit 31, and the second path charging circuit 40 charges the second device to be charged through the second path bypass circuit 41, without performing voltage conversion by the first path voltage converter 32 or the second path voltage converter 42, thereby further improving the energy conversion efficiency.

And S106, when the voltage converter 42 of the second path of the charging circuit 40 of the second path is not equal to the first request voltage, keeping the voltage converter 42 of the second path of the charging circuit 40 of the second path on, and outputting the charging voltage equal to the second request voltage, and keeping the bypass circuit 41 of the second path of the charging circuit 40 of the second path off.

Specifically, when the first request voltage is not equal to the second request voltage, that is, the charging voltage currently output by the flyback circuit 20 is not equal to the second request voltage, at this time, the controller 10 controls the voltage converter 42 of the second circuit charging circuit 40 to output the charging voltage equal to the second request voltage to charge the second device to be charged, and at this time, the controller 10 controls the bypass circuit 41 of the second circuit charging circuit 40 to be turned off. It should be noted that, the first device to be charged electrically connected to the first path of charging Port 34(Port1) determines the charging voltage output by the flyback circuit 20, and since one end of the multiple paths of charging circuits connected in parallel is connected to the power output terminal 20c of the same flyback circuit 20, on the basis that the first charging circuit 30 is connected to the first device to be charged, the second request voltage of the second path of charging circuit 40 needs to be equal to the first request voltage, so as to open the bypass circuit 41 of the second path, otherwise, the second charging device cannot be charged with the second request voltage.

In some embodiments, referring to fig. 6, step S102 includes:

s201, determining whether a preset output voltage of the flyback circuit 20 is equal to the first request voltage;

in this embodiment, a preset output voltage (generally 25V) of the flyback circuit 20 is used for connecting the first path of voltage converter 32, so that the first path of voltage converter 32 outputs a preset charging voltage, and communication between the first path of protocol chip 33 and the first device to be charged is realized; then, when the controller 10 obtains the first request voltage, the first request voltage needs to be compared with the preset output voltage of the flyback circuit to determine whether the preset output voltage of the flyback circuit needs to be adjusted.

S202, when the voltage is equal to the preset voltage, outputting the preset output voltage as the charging voltage;

in this embodiment, when the preset output voltage is equal to the first request voltage, the preset output voltage of the flyback circuit does not need to be adjusted, and the preset output voltage can be directly output to the first charging device as the charging voltage, so that the charging process is simplified.

And S203, when the preset output voltage is not equal to the first request voltage, adjusting the preset output voltage to be equal to the first request voltage and outputting the first request voltage.

In this embodiment, when the preset output voltage is not equal to the first request voltage, the controller 10 controls the flyback circuit 20 to adjust the preset output voltage to a charging voltage equal to the first request voltage and output the charging voltage, so as to charge the first device to be charged.

In some embodiments, referring to fig. 7, before step S101, the method includes:

s107, controlling the flyback circuit 20 to output a preset output voltage, and controlling the first path of the voltage converter 32 to be turned off and the first path of the control bypass circuit 31 to be turned off;

specifically, when the charging port 34 of the first path is not connected to the device to be charged, the controller 10 controls the voltage converter 32 of the first path to be turned off and the bypass circuit 31 of the first path to be turned off, and the charging circuit 30 of the first path does not need to be powered on.

S108, when receiving a connection signal sent by the protocol chip 33 of the first path of the charging circuit 30, controlling the voltage converter 32 of the first path to turn on and output a preset charging voltage, and controlling the protocol chip 33 of the first path to broadcast a message; the message includes multiple preset charging voltages to be selected, the device to be charged determines that the protocol chip 33 in the first path is in a connection state according to the preset charging voltages and receives the message, one charging voltage is selected from the multiple charging voltages to be selected in the message as the first request voltage, and the first request voltage is sent to the protocol chip 33 in the first path, so that the protocol chip 33 in the first path forwards the first request voltage.

Specifically, referring to fig. 7, when the charging Port 34(Port1) of the first path is connected to the first device to be charged, the protocol chip 33 of the first path sends a connection signal to the controller 10, the controller 10 controls the voltage converter 32 of the first path to output a preset charging voltage (for example, 5V) to the charging Port 34(Port1) of the first path according to the connection signal, so as to electrically connect to the first device to be charged, meanwhile, the controller 10 controls the protocol chip 33 of the first path to broadcast a message, the message includes multiple preset charging voltages, the first device to be charged confirms that the protocol chip 33 of the first path is in a connection state according to the preset charging voltage, selects one charging voltage from the multiple preset charging voltages as the first request voltage, and sends the first request voltage to the protocol chip 33 of the first path, so that the protocol chip 33 of the first path forwards the first request voltage to the controller 10, the controller 10 obtains a first request voltage of the first device to be charged, so as to control the flyback circuit 20 to output a charging voltage equal to the first request voltage.

In a third aspect, the present application provides a charger comprising the above-described charge control circuit, or performing the steps of the above-described charge control method. Those skilled in the art can understand the charger provided in the present application by combining the description of the charging control circuit or the charging control method, which is not described herein again.

Based on the above description, the charger may provide two or more charging circuits for connecting two or more devices to be charged.

In a fourth aspect, the present application provides a storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor and to carry out the steps of the above-described method.

Specifically, the steps of the method may be integrated in one processing unit, or integrated in multiple processing units, where the multiple processing units exist separately and physically, or two or more processing units are integrated in one unit. The integrated unit can be realized in a hardware form, and can also be realized in a software functional unit form.

The integrated unit is implemented in the form of a software functional unit, and may be stored in a computer readable storage medium when sold or used as a stand-alone product. It will be appreciated that the storage medium stores a plurality of instructions adapted to be loaded by the processor and to carry out the steps of the above-described method.

The instructions are used to cause a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to perform the steps of the above-described method. The aforementioned device with storage function may include: a U-disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, a server, and other various media capable of storing program codes.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A charge control circuit, comprising:

a controller;

the flyback circuit is connected with the controller and is used for converting the voltage of a power supply into a charging voltage required by equipment to be charged so as to charge the equipment to be charged;

the charging circuits are connected with the flyback circuits so as to transmit the charging voltage output by the flyback circuits to the equipment to be charged, each charging circuit comprises a bypass circuit, a voltage converter, a protocol chip and a charging port, and the equipment to be charged is connected with the charging port;

the flyback circuit outputs two paths, the first path is electrically connected with the charging port through the bypass circuit, and the bypass circuit is electrically connected with the controller so as to control the on-off of the bypass circuit through the controller; the second path is electrically connected with the charging port through the voltage converter and the protocol chip, and the voltage converter is electrically connected with the controller so as to control whether the voltage converter is switched on or not through the controller;

the protocol chip is connected with the controller and used for communicating with the equipment to be charged so as to determine the requested voltage of the equipment to be charged and transmitting a requested voltage signal to the controller, and the controller controls the flyback circuit to output a charging voltage equal to the requested voltage and controls the bypass circuit to be conducted so that the charging voltage is transmitted to the equipment to be charged through the bypass circuit.

2. The charge control circuit of claim 1, wherein the bypass circuit is a semiconductor switching device having a bypass control terminal connected to the controller, a bypass input terminal connected to the flyback circuit output terminal, and a bypass output terminal connected to the charge port;

when the flyback circuit outputs a charging voltage equal to the requested voltage, the controller controls the semiconductor switch device to be conducted, and the charging voltage is transmitted to the equipment to be charged through the semiconductor switch device.

3. The charge control circuit of claim 1 or 2, wherein the flyback circuit comprises:

the rectifying circuit is connected with the power supply and is used for converting an alternating current signal input by the power supply into a direct current signal;

and the transformer is connected with the rectifying circuit and the multi-path charging circuit and is used for converting the direct current signal into the charging voltage equal to the request voltage.

4. The charge control circuit of claim 3, wherein the transformer comprises a primary winding and a secondary winding coupled to the primary winding, the secondary winding is connected in series with a switching tube and a capacitor, and the switching tube is used for controlling the capacitor to store and release energy; alternatively, the first and second electrodes may be,

the transformer comprises a primary winding and a secondary winding coupled with the primary winding, wherein a diode and a capacitor are connected in series on the secondary winding, and the diode is used for controlling the capacitor to store and release energy.

5. A charging control method, which is implemented based on the charging control circuit of any one of claims 1 to 4, the charging control method comprising:

6. The charge control method according to claim 5, wherein after the step of controlling the bypass circuit of the first path to be turned on to output the charging voltage through the bypass circuit of the first path and controlling the voltage converter of the first path to be turned off after a first preset time, the method further comprises:

7. The charge control method of claim 5, wherein the step of controlling the flyback circuit to output a charge voltage equal to the first requested voltage comprises:

8. The charge control method according to any one of claims 5 to 7, wherein the step of receiving the first request voltage sent by the protocol chip of the first path of the charging circuit is preceded by:

when receiving a connection signal sent by a first path of protocol chip of the first path of charging circuit, controlling the voltage converter of the first path to be switched on and output a preset charging voltage, and controlling the protocol chip of the first path to broadcast a message; the message comprises multiple preset charging voltages to be selected, the equipment to be charged confirms that the protocol chip in the first path is in a connection state according to the preset charging voltages and receives the message, one charging voltage is selected from the multiple charging voltages to be selected in the message to be used as the first request voltage, and the first request voltage is sent to the protocol chip in the first path so that the protocol chip in the first path can forward the first request voltage.

9. A charger, characterized in that it comprises a charge control circuit according to any of claims 14 or performs the steps of a method according to any of claims 5-8.

10. A storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the steps of the method according to any of claims 5-8.