CN211266506U - Control circuit - Google Patents
Control circuit Download PDFInfo
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- CN211266506U CN211266506U CN201921863607.7U CN201921863607U CN211266506U CN 211266506 U CN211266506 U CN 211266506U CN 201921863607 U CN201921863607 U CN 201921863607U CN 211266506 U CN211266506 U CN 211266506U
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Abstract
A control circuit, comprising: the first pin of the charging controller is connected with the battery; the key module is connected with a second pin of the charging controller; the output end of the switch module is connected with a third pin of the charging controller; the MCU is respectively connected with the second pin, the signal pin for charge control, the key module and the input end of the switch module; the charging controller is used for receiving a control signal sent by the MCU through the signal pin, disconnecting the first pin from the second pin according to the control signal, and controlling the working current of the charging controller to be reduced to a set value so as to enter a shipping mode; when the charging controller is in a shipping mode and the key module receives a pressing signal, the connection between the first pin and the second pin is instantly conducted so that the MCU is activated and conducts the switch module, and the switch module is conducted to output a level signal to the charging controller so as to exit the shipping mode.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a control circuit.
Background
The bluetooth headset is generally used in conjunction with a mobile phone, and receives a radio signal from the mobile phone in a bluetooth manner to transmit audio information, so as to facilitate answering a call and listening to music. Bluetooth headsets are typically battery powered, and battery charging is an integral part of the headset.
The existing Bluetooth headset has large power consumption and needs frequent charging, thereby not only influencing the normal use of people, but also influencing the service life of a battery. Therefore, how to reduce the power consumption of the bluetooth headset is an important direction of attention of research and development personnel.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, it is necessary to provide a control circuit for solving the problem of excessive power consumption of the existing bluetooth headset.
A control circuit, comprising:
the first pin of the charging controller is connected with a battery;
the key module is connected with a second pin of the charging controller;
the output end of the switch module is connected with a third pin of the charge controller;
the MCU is respectively connected with the second pin, the signal pin for charging control, the key module and the input end of the switch module; wherein the content of the first and second substances,
the charging controller is used for receiving a control signal sent by the MCU through the signal pin, disconnecting the first pin from the second pin according to the control signal, and controlling the working current of the charging controller to be reduced to a set value so as to enable the charging controller to enter a shipping mode;
when the charging controller is in a shipping mode and the key module receives a pressing signal, the connection between the first pin and the second pin is instantly conducted so that the MCU is activated and conducts the switch module, and the switch module conducts and outputs a level signal to the charging controller so as to exit the shipping mode.
Further, in the control circuit, the key module includes a key switch and a diode, an anode of the diode is connected to the key switch, a cathode of the diode is connected to the second pin, and when the key switch is turned off, the diode is turned on.
Further, in the control circuit, the switch module includes a GPIO interface and an MOS transistor, the GPIO interface is connected to the MCU, a gate of the MOS transistor is connected to the GPIO interface, a drain of the MOS transistor is connected to the third pin, and a source of the MOS transistor is grounded.
Further, in the control circuit, a first resistor is further connected between the GPIO port and the MOS transistor, and a ground resistor is further connected between the MOS transistor and the first resistor.
Further, the control circuit further comprises a filter voltage stabilizing circuit connected between the charge controller and the battery.
Further, in the control circuit, the filtering and voltage stabilizing circuit includes a first grounded capacitor and a second grounded capacitor connected in parallel, the first grounded capacitor is connected between the first pin and the diode, and the second grounded capacitor is connected between the second pin and the battery.
Furthermore, the control circuit further comprises a Type-C interface and an overcurrent and overvoltage protection chip, an input pin of the overcurrent and overvoltage protection chip is connected with the Type-C interface, an output pin of the overcurrent and overvoltage protection chip is connected with an input pin of the charging controller, and an ILIM pin of the overcurrent and overvoltage protection chip is connected with a ground resistor.
Furthermore, the control circuit further comprises an electrostatic protection circuit, wherein the electrostatic protection circuit comprises an ESD device, one end of the ESD device is connected with the VBUS pin of the Type-C interface, and the other end of the ESD device is grounded.
Further, in the control circuit, the ESD device is a TVS transistor.
The utility model utilizes two pins of the charge controller to connect the battery and the MCU, and the voltage output provided to the MCU by the charge controller is closed through MCU program control, so that the rear end voltage is closed, and the product enters a shipping mode to reduce the power consumption; and the ship mode is rapidly exited by triggering through the cooperation of the MCU, the module and the switch module. The utility model provides a can reduce product consumption, energy-conserving control circuit to a technical scheme who withdraws from low-power consumption state fast is provided.
Drawings
Fig. 1 is a block diagram of a charge control circuit according to a first embodiment of the present invention;
fig. 2 is a circuit diagram of a charge control circuit according to a first embodiment of the present invention;
fig. 3 is a circuit diagram of a charge control circuit according to a second embodiment of the present invention.
Description of the main elements
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The embodiment of the invention is given in the attached drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, this embodiment is provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, a control circuit according to a first embodiment of the present invention includes a charging controller U7, a key module 10, a switch module 20, and an MCU 30. The charge controller U7 may be, for example, a MPS2661 chip having a plurality of pins, a first pin BATT connected to the battery VBAT, a second pin SYS connected to the key module, and a third pin INT connected to the output terminal of the switch module. The MCU30 is connected to the second pin SYS of the charge controller U7, the signal pin of the charge controller U7, the key module 10, and the input terminal of the switch module 20. The charging controller U7 has two signal pins, which are SDA and SCL, respectively, and are data line and clock line, respectively.
The control circuit is used for controlling the product to enter and exit the ship MODE. In the shipping mode, the charge controller U7 turns off the voltage output from the battery VBAT to the MCU30, turning off the back-end voltage, and enters low power consumption by itself.
The MCU30 transmits a control signal to the charge controller U7 through a signal pin to control disconnection between the first pin SYS and the second pin BATT of the charge controller U7, thereby disconnecting the connection between the battery and the MCU, powering off the MCU, and reducing power consumption of the product, and meanwhile, the working current of the charge controller itself is reduced to a set value, and enters a low power consumption state, thereby making the product enter a shipping mode. The operating current of the charge controller in the shipping mode may be set according to product practice, for example, may be set to 10uA or less.
When the method is specifically implemented, the electronic product can be controlled to enter the shipping mode through a program set in the MCU, for example, the electronic product enters the shipping mode when the product is delivered or when the Bluetooth headset is detected not to be connected with the terminal for a long time.
It can be understood that, in other embodiments of the present invention, the electronic product may be triggered to enter the SHIPPING MODE through usb command, the ship MODE key, or the composite key.
When the electronic product is in a shipping mode and the key module receives a pressing signal, the first pin and the second pin are instantly connected to enable the MCU to be activated and connected to enable the switch module to be connected and output a level signal to the charging controller, and the charging controller continuously connects the first pin and the second pin after acquiring the level signal to enable the battery to supply power to the MCU and simultaneously controls the working current of the charging controller to recover to normal, so that the electronic product exits the shipping mode.
Specifically, the key module 10 includes a key switch K1 and a diode D2, wherein an anode of the diode D2 is connected to the key switch K1, and a cathode thereof is connected to the second pin SYS of the charge controller. The switch module 20 includes a GPIO interface 12 and a MOS transistor Q3, the GPIO interface 12 is connected to the MCU30, the gate of the MOS transistor D3 is connected to the GPIO interface 12, the drain is connected to the third pin INT of the charge controller U7, and the source is grounded.
When the key switch K1 is closed, the diode D2 is turned on, and the MCU30 connected to the diode D2 is instantaneously powered by the battery to activate the MCU. At this time, the MCU sends a control signal to the MOS transistor Q3 to turn on the MOS transistor Q3, and the drain of the MOS transistor Q3 outputs a low level signal to the charge controller U7, so that the charge controller U7 turns on the connection between the first pin BATT and the second pin SYS, and the charge controller U7 enters a low power consumption state.
Further, a first resistor R1 is connected between the GPIO port 12 and the MOS transistor Q3, a second grounded resistor is connected between the MOS transistor Q3 and the first resistor R1, and the first resistor and the second resistor play a role in limiting current.
Further, the control circuit further comprises a filtering and voltage stabilizing circuit connected between the charging controller U7 and the battery VBAT, wherein the filtering and voltage stabilizing circuit comprises two grounding capacitors C1 and C2 which are connected in parallel. The ground capacitor C1 is connected between the first pin BATT of the charge controller U1 and the diode D2, and the ground capacitor C2 is connected between the second pin SYS of the charge controller U7 and the battery VBAT. The circuit between the battery and the MCU is used for filtering, so that stable power supply to the MCU is ensured.
The NTC pin of the charge controller U7 is connected through a third resistor R3 and a grounded fourth resistor R4 to a power supply terminal VDD, which provides a stable power supply for the charge controller to operate.
The charging controller can realize a general charging control function, and IN specific implementation, an input pin IN of the charging controller is connected with a Type-C interface through an OVB-USB lead, and the Type-C interface is used for connecting an external charging device so as to charge a battery.
In the embodiment, two pins of the charge controller are used for connecting the battery and the MCU, the voltage output provided by the charge controller to the MCU is closed through MCU program control, the rear end voltage is closed, and the product enters a shipping mode to reduce power consumption; and the ship mode is rapidly exited by triggering through the cooperation of the MCU, the module and the switch module. The embodiment provides a control circuit capable of reducing the power consumption of a product and saving energy, and provides a technical scheme for rapidly exiting a low power consumption state.
Referring to fig. 3, a control circuit according to a second embodiment of the present invention is substantially the same as that of the first embodiment, except that the control circuit further includes an overcurrent and overvoltage protection chip U3 and an electrostatic protection circuit connected to an input terminal of the charge controller.
The overcurrent and overvoltage protection chip U3 can be, for example, a model HP2601 chip, an input pin IN of the overcurrent and overvoltage protection chip U3 is connected to a VBUS pin of a Type-C interface, an output pin OUT is connected to an input pin IN of the charge controller U7, and an ILIM pin of the overcurrent and overvoltage protection chip U3 is connected to a ground resistor R5. The overcurrent and overvoltage protection chip is used for controlling and outputting stable working voltage and working current, namely when the input voltage of a connected charger is greater than the normal working voltage of a product, the overcurrent and overvoltage protection chip starts a voltage stabilizing function to maintain the output voltage at a constant value, and the maximum input voltage can be protected to 28V; when the product is abnormal in the charging process, and the current is overlarge and abnormal, the overcurrent and overvoltage protection chip starts a protection mechanism, cuts off the output voltage to enable the output voltage to be 0V, and plays a role in protection.
The ESD protection circuit includes an ESD device E1, which may be a TVS transistor (transient diode). One end of the ESD device E1 is connected with a VBUS pin of the Type-C interface, and the other end of the ESD device E1 is grounded. The electrostatic protection circuit is used for carrying out ESD electrostatic protection on the charging process of the battery and preventing electrostatic interference.
In this embodiment, when bluetooth headset inserts the Type C line and charges, the signal of telecommunication is through ESD electrostatic protection, anti-interference decay, and the rethread overflows the stable voltage of overvoltage protection chip output and supplies power to charge controller, and charge controller ensures that the power supply to MCU is stable behind filtering and voltage stabilizing circuit, also charges the battery simultaneously.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. A control circuit, comprising:
the first pin of the charging controller is connected with a battery;
the key module is connected with a second pin of the charging controller;
the output end of the switch module is connected with a third pin of the charge controller;
the MCU is respectively connected with the second pin, the signal pin for charging control, the key module and the input end of the switch module; wherein the content of the first and second substances,
the charging controller is used for receiving a control signal sent by the MCU through the signal pin, disconnecting the first pin from the second pin according to the control signal, and controlling the working current of the charging controller to be reduced to a set value so as to enter a shipping mode;
when the charging controller is in a shipping mode and the key module receives a pressing signal, the connection between the first pin and the second pin is instantly conducted so that the MCU is activated and the switch module is conducted, and the switch module is conducted to output a level signal to the charging controller so that the charging controller exits the shipping mode.
2. The control circuit of claim 1, wherein the key module includes a key switch and a diode, the diode having an anode connected to the key switch and a cathode connected to the second pin, the diode conducting when the key switch is closed.
3. The control circuit of claim 1, wherein the switch module comprises a GPIO interface and an MOS (metal oxide semiconductor) transistor, the GPIO interface is connected with the MCU, a gate of the MOS transistor is connected with the GPIO interface, a drain of the MOS transistor is connected with the third pin, and a source of the MOS transistor is grounded.
4. The control circuit of claim 3, wherein a first resistor is further connected between the GPIO port and the MOS transistor, and a ground resistor is further connected between the MOS transistor and the first resistor.
5. The control circuit of claim 2, further comprising a filtering regulation circuit connected between the charge controller and the battery.
6. The control circuit of claim 5, wherein the filtering regulation circuit includes two first and second grounded capacitors connected in parallel, the first grounded capacitor being connected between the first pin and the diode, the second grounded capacitor being connected between the second pin and the battery.
7. The control circuit of claim 1, further comprising a Type-C interface and an over-current and over-voltage protection chip, wherein an input pin of the over-current and over-voltage protection chip is connected to the Type-C interface, an output pin of the over-current and over-voltage protection chip is connected to an input pin of the charge controller, and an ILIM pin of the over-current and over-voltage protection chip is connected to a ground resistor.
8. The control circuit of claim 7, further comprising an electrostatic protection circuit, the electrostatic protection circuit comprising an ESD device having one end connected to the VBUS pin of the Type-C interface and another end connected to ground.
9. The control circuit of claim 8, wherein the ESD device is a TVS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921863607.7U CN211266506U (en) | 2019-10-31 | 2019-10-31 | Control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921863607.7U CN211266506U (en) | 2019-10-31 | 2019-10-31 | Control circuit |
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| CN211266506U true CN211266506U (en) | 2020-08-14 |
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| CN201921863607.7U Active CN211266506U (en) | 2019-10-31 | 2019-10-31 | Control circuit |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987773A (en) * | 2020-08-27 | 2020-11-24 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN111987772A (en) * | 2020-08-27 | 2020-11-24 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN111987771A (en) * | 2020-08-27 | 2020-11-24 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN112039152A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | Bluetooth earphone |
| CN112039154A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic device |
| CN112039153A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN112271772A (en) * | 2020-10-15 | 2021-01-26 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack, test system and electronic device |
| WO2022042708A1 (en) * | 2020-08-27 | 2022-03-03 | 西安稳先半导体科技有限责任公司 | System-on-chip, battery assembly, electronic device, battery protection circuit, test subsystem, test system, bluetooth earphone, shipping mode setting method, and computer readable storage medium |
| CN114209094A (en) * | 2021-12-30 | 2022-03-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electron cigarette |
| CN114223955A (en) * | 2021-12-30 | 2022-03-25 | 西安稳先半导体科技有限责任公司 | Electronic cigarette |
| CN114376271A (en) * | 2021-12-30 | 2022-04-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic device |
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2019
- 2019-10-31 CN CN201921863607.7U patent/CN211266506U/en active Active
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022042708A1 (en) * | 2020-08-27 | 2022-03-03 | 西安稳先半导体科技有限责任公司 | System-on-chip, battery assembly, electronic device, battery protection circuit, test subsystem, test system, bluetooth earphone, shipping mode setting method, and computer readable storage medium |
| CN111987773B (en) * | 2020-08-27 | 2022-05-20 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN111987771A (en) * | 2020-08-27 | 2020-11-24 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN112039152A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | Bluetooth earphone |
| CN111987773A (en) * | 2020-08-27 | 2020-11-24 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN112039153A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN111987772A (en) * | 2020-08-27 | 2020-11-24 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN111987771B (en) * | 2020-08-27 | 2022-02-22 | 西安稳先半导体科技有限责任公司 | On-chip system, battery pack and electronic device |
| CN112039154A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic device |
| CN112271772A (en) * | 2020-10-15 | 2021-01-26 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack, test system and electronic device |
| CN114223955A (en) * | 2021-12-30 | 2022-03-25 | 西安稳先半导体科技有限责任公司 | Electronic cigarette |
| CN114376271A (en) * | 2021-12-30 | 2022-04-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic device |
| CN114209094A (en) * | 2021-12-30 | 2022-03-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electron cigarette |
| CN114209094B (en) * | 2021-12-30 | 2024-04-26 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic cigarette |
| CN114223955B (en) * | 2021-12-30 | 2024-04-26 | 西安稳先半导体科技有限责任公司 | Electronic cigarette |
| CN114376271B (en) * | 2021-12-30 | 2024-04-26 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electronic device |
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