WO2022199219A1 - 充电电路、芯片和设备 - Google Patents

充电电路、芯片和设备 Download PDF

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Publication number
WO2022199219A1
WO2022199219A1 PCT/CN2022/070889 CN2022070889W WO2022199219A1 WO 2022199219 A1 WO2022199219 A1 WO 2022199219A1 CN 2022070889 W CN2022070889 W CN 2022070889W WO 2022199219 A1 WO2022199219 A1 WO 2022199219A1
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WO
WIPO (PCT)
Prior art keywords
circuit
capacitor
charging
transistor
switch tube
Prior art date
Application number
PCT/CN2022/070889
Other languages
English (en)
French (fr)
Inventor
曲春营
万世铭
Original Assignee
Oppo广东移动通信有限公司
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Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2022199219A1 publication Critical patent/WO2022199219A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Definitions

  • the present application relates to the technical field of wireless charging, and in particular, to a charging circuit, chip and device.
  • the wireless charging system includes a wireless charging transmitter and a wireless charging receiver.
  • the wireless charging receiver is composed of a receiver coil, a rectifier circuit, and an output circuit.
  • the inductance of the receiving end coil is required to be 8-9uh.
  • the inductance of the receiving end coil is usually reduced to obtain higher power wireless charging.
  • the wireless charging receiving end will be under-voltage, so that the receiving end chip in the wireless charging receiving end cannot be activated.
  • the embodiments of the present application provide an information display method, an apparatus, an electronic device, and a computer-readable storage medium, which can intuitively and clearly know the connection status between the second terminal and the first terminal.
  • a charging circuit characterized in that it includes:
  • a magnetic induction circuit a rectifier circuit, a switch circuit and a booster circuit; the output end of the magnetism induction circuit is connected with the input end of the rectifier circuit, and the switch circuit is respectively connected with the rectifier circuit and the booster circuit;
  • the magnetic induction circuit is used to receive the electromagnetic signal sent by the transmitting end, and generate alternating current according to the electromagnetic signal;
  • the rectifier circuit for converting the alternating current into direct current
  • the switch circuit configured to turn on the path between the rectifier circuit and the booster circuit, and charge the booster circuit through the direct current
  • the boosting circuit is used for boosting the output voltage of the magnetic induction circuit.
  • the boost circuit includes at least one charge and discharge circuit, and the charge and discharge circuit is connected to the switch circuit;
  • the switch circuit is used for conducting the path between the rectifier circuit and the charging and discharging circuit, and charging the charging and discharging circuit in the positive half cycle and the negative half cycle of the waveform of the output voltage of the magnetic induction circuit respectively .
  • the booster circuit includes a first charge-discharge circuit and a second charge-discharge circuit, the first charge-discharge circuit and the second charge-discharge circuit are respectively connected to the rectifier circuit, and the switch circuit is connected to the a common terminal connection between the first charging and discharging circuit and the second charging and discharging circuit;
  • the switch circuit is used to conduct the passage between the rectifier circuit and the first charge-discharge circuit and the second charge-discharge circuit; and in the positive half cycle of the output voltage of the magnetic induction circuit, through the The direct current charges the first charging and discharging circuit, and the second charging and discharging circuit is charged by the direct current in the negative half cycle of the waveform of the output voltage of the magnetic induction circuit.
  • the first charge and discharge circuit includes at least one first capacitor
  • the second charge and discharge circuit includes at least one second capacitor
  • the first capacitor and the second capacitor are respectively connected to the rectifier circuit
  • the switch circuit is connected to the common terminal between the first capacitor and the second capacitor
  • the switch circuit is used to conduct the path between the rectifier circuit and the at least one first capacitor and the at least one second capacitor; and in the positive half cycle of the output voltage waveform of the magnetic induction circuit, through the The direct current charges the at least one first capacitor, and during the negative half cycle of the waveform of the output voltage of the magnetic induction circuit, the at least one second capacitor is charged by the direct current.
  • the switch circuit includes a drive circuit and at least one switch tube;
  • the output end of the drive circuit is connected to the control end of the switch tube, and the switch tube is also connected to the rectifier circuit and the boost circuit respectively;
  • the drive circuit is used to control the conduction state of the switch tube.
  • the switch tube includes a first switch tube; the control end of the first switch tube is connected to the output end of the drive circuit; the input end of the first switch tube is connected to the rectifier circuit; the The output end of the first switch tube is connected to the boosting circuit.
  • the switch tube includes a second switch tube and a third switch tube;
  • the output end of the driving circuit is respectively connected with the control end of the second switch tube and the control end of the third switch tube;
  • the output end of the second switch tube is connected to the input end of the third switch tube; the input end of the second switch tube is connected to the rectifier circuit; the output end of the third switch tube is connected to the booster circuit. voltage circuit connection.
  • the input end of the drive circuit is connected to the output end of the magnetic induction circuit
  • the drive circuit is configured to conduct the switch tube through the output voltage of the magnetic induction circuit.
  • the drive circuit includes a first transistor, a second transistor, a third capacitor, a fourth capacitor, a fifth capacitor, a first load, a second load and a first voltage regulator transistor;
  • the input end of the first transistor is connected to the first end of the magnetic induction circuit, the output end of the first transistor is connected to the first end of the third capacitor, and the second end of the third capacitor is connected to the the second end of the magnetic induction circuit is connected;
  • the first end of the fourth capacitor is connected to the second end of the magnetic induction circuit, the second end of the fourth capacitor is connected to the input end of the second transistor, and the output end of the second transistor is connected to the input end of the second transistor. the first end of the magnetic induction circuit is connected;
  • the first end of the third capacitor is connected to the first end of the first load, the second end of the first load is connected to the first end of the second load, and the second end of the second load is connected to the first end of the second load.
  • the terminal is connected to the input terminal of the first voltage regulator transistor;
  • the first end of the fifth capacitor is connected to the common end between the first load and the second load, and the second end of the fifth capacitor is connected to the second end of the fourth capacitor;
  • the second end of the fourth capacitor, the second end of the fifth capacitor, and the second end of the second load are all grounded;
  • the output end of the first voltage regulator transistor is connected to the control end of the switch tube.
  • the input end of the drive circuit is connected to the drive pin of the rectifier circuit
  • the drive circuit is configured to turn on the switch tube through the drive voltage of the rectifier circuit.
  • the driving circuit includes a second voltage regulator transistor, a sixth capacitor, a seventh capacitor, a third load and a fourth load;
  • the input end of the second voltage-stabilizing transistor is connected to the driving pin of the rectifier circuit, and the output end of the second voltage-stabilizing transistor is respectively connected to the first end of the sixth capacitor and the first end of the seventh capacitor. One end is connected; the second end of the sixth capacitor and the second end of the seventh capacitor are both grounded;
  • the output end of the second voltage regulator transistor is also connected to the first end of the third load; the second end of the third load is connected to the first end of the fourth load; The second terminal is grounded;
  • the common terminal between the third load and the fourth load is connected to the control terminal of the switch tube.
  • the driving circuit further includes a bias unit; the output end of the bias unit is connected to the input end of the second voltage-stabilizing transistor;
  • the bias unit is used for boosting the input voltage of the second voltage regulator transistor, so as to boost the output voltage of the driving circuit.
  • the bias unit includes a third voltage regulator transistor, an eighth capacitor and a fifth load;
  • the input end of the fifth load is connected to the drive pin of the bias unit, the output end of the fifth load is connected to the input end of the third voltage regulator transistor; the first end of the eighth capacitor connected to the input end of the third voltage regulator transistor, and the second end of the eighth capacitor is grounded;
  • the output terminal of the third voltage regulator transistor is connected to the input terminal of the second voltage regulator transistor.
  • the drive circuit is connected to a power circuit of a device where the charging circuit is located;
  • the drive circuit is configured to turn on the switch tube through the output voltage of the power supply circuit.
  • the power supply circuit includes a low dropout linear regulator and/or a charge pump.
  • a chip includes the charging circuit.
  • a device includes the chip.
  • An apparatus includes the charging circuit.
  • the charging circuit includes: a magnetic induction circuit, a rectifying circuit, a switching circuit and a boosting circuit, wherein the output end of the magnetic induction circuit is connected to the input end of the rectifying circuit, and the switching circuit is respectively connected with the rectifying circuit and the boosting circuit connect.
  • the magnetic induction circuit receives the electromagnetic signal sent by the transmitter, generates alternating current according to the electromagnetic signal, the rectifier circuit converts the alternating current into direct current, and the switch circuit can conduct the passage between the rectifier circuit and the booster circuit, so that the booster circuit can affect the magnetic induction circuit.
  • the output voltage is boosted.
  • the path between the rectifier circuit and the booster circuit is turned on, so that the booster circuit can be charged, thereby boosting the output voltage of the magnetic induction circuit.
  • the chip or device where the charging circuit is located can also be started based on the boosted output voltage, thus overcoming the undervoltage of the chip where the charging circuit is located due to the too small output voltage of the charging circuit.
  • it cannot be started resulting in the problem that the device where the charging circuit is located cannot be charged.
  • FIG. 1 is a schematic diagram of an environment of wireless charging in one embodiment
  • FIG. 2 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 3 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 4 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 5 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 6 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 7 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 8 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 9 is a schematic diagram of a circuit structure of a charging circuit in one embodiment.
  • FIG. 10 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 11 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 12 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 13 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • FIG. 14 is a schematic diagram of a circuit structure of a charging circuit in one embodiment
  • 15 is a schematic structural diagram of a chip in one embodiment
  • 16 is a schematic structural diagram of a device in one embodiment
  • FIG. 17 is a schematic structural diagram of a device in one embodiment.
  • first, second, etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element.
  • a first client may be referred to as a second client, and similarly, a second client may be referred to as a first client, without departing from the scope of this application.
  • Both the first client and the second client are clients, but they are not the same client.
  • the wireless charging scenario includes a wireless charging transmitter and a wireless charging receiver.
  • the circuit of the wireless charging transmitter includes a power supply V, an inverter circuit B, a capacitor C P , a transmitter magnetic induction coil LP , and the transmitter induction coil LP and the capacitor C P form a resonance circuit.
  • the inverter circuit B is connected to the power source V, and is used for inverting and converting the direct current generated by the power source V, and outputting the alternating current after the inverter conversion to the capacitor C P , and the alternating current generates a magnetic induction signal and a magnetic induction electromotive force V P through the resonant circuit. .
  • the charging circuit of the wireless charging receiving end includes a magnetic induction coil L S at the receiving end, a capacitor C S , a capacitor C d , a modulation circuit M C , a rectifying circuit R C , an output capacitor C and an output load R m , wherein the magnetic induction coil L S at the receiving end is It forms a receiving loop with the capacitor C S and the capacitor C d .
  • the receiving loop receives the magnetic induction coil LP at the transmitting end to generate a magnetic induction signal to form a corresponding magnetic induction alternating current, and the magnetic induction alternating current is input to the rectifier circuit RC through the modulation circuit MC , and the rectifier circuit RC converts the received alternating current.
  • the DC current passes through the output capacitor C and the output load R m to form the output voltage of the charging circuit, and the output voltage is used to start the chip where the charging circuit is located.
  • the chip When the chip is started, it can realize the wireless charging of the device containing the chip. operation.
  • the magnetic induction coil L S at the receiving end of the wireless charging receiving end will affect the output voltage of the charging circuit, that is, if the inductance of the magnetic induction coil L S at the receiving end decreases, the corresponding magnetic induction alternating current will decrease, and the output voltage of the charging circuit will also decrease;
  • the reduction in the inductance of the magnetic induction coil L S at the receiving end includes that the number of turns of the magnetic induction coil at the receiving end decreases, or the relative positions of the magnetic induction coil L S at the receiving end and the magnetic induction coil LP at the transmitting end are shifted.
  • the output voltage of the charging circuit is reduced, it may cause the chip where the charging circuit is located to be unable to start due to undervoltage, so that the device where the charging circuit is located cannot be charged.
  • this embodiment proposes a charging circuit, a chip and a device.
  • the output voltage of the charging circuit is always greater than or equal to the startup voltage of the chip where the charging circuit is located, and overcomes the problems caused by charging.
  • the output voltage of the circuit is too small, so that the chip where the charging circuit is located cannot be started due to under-voltage, so that the device where the charging circuit is located cannot be charged, which is explained below through specific embodiments.
  • FIG. 2 provides a charging circuit 1.
  • the charging circuit 1 includes: a magnetic induction circuit 01, a rectifier circuit 02, a switch circuit 03 and a boost circuit 04; the output end of the magnetic induction circuit 01 and the input end of the rectifier circuit 02
  • the switch circuit 03 is connected to the rectifier circuit 02 and the booster circuit 04 respectively.
  • the magnetic induction circuit 01 is used to receive the electromagnetic signal sent by the transmitter and generate alternating current according to the electromagnetic signal; the rectifier circuit 02 is used to convert the alternating current into direct current; the switch circuit 03 is used to conduct the connection between the rectifier circuit 02 and the booster circuit 04 The path between the two is used to charge the booster circuit 04 through direct current; the booster circuit 04 is used to boost the output voltage of the magnetic induction circuit 01 .
  • the magnetic induction circuit 01 may include magnetic induction coils, inductors, etc.
  • the magnetic induction circuit 01 is used to receive electromagnetic signals sent by the magnetic induction circuit at the transmitting end, thereby forming induced electromotive force and/or induced alternating current.
  • the rectifier circuit 02 is used to convert alternating current into direct current.
  • the rectifier circuit 02 may be a full-bridge rectifier circuit.
  • the full-bridge rectifier circuit may be composed of four transistors.
  • the switch circuit 03 may be a circuit composed of transistors, for example, the transistor may be a switch tube, such as a diode, a triode, a field effect transistor, or a common circuit switch device.
  • the booster circuit 04 may include a capacitor, and the capacitor is used to store the electric charge in the charging circuit and play the role of charging.
  • the magnetic induction circuit 01 receives the electromagnetic signal sent by the magnetic induction circuit at the transmitting end to form an induced alternating current.
  • the alternating current output by the magnetic induction circuit 01 passes through the rectifier circuit 02 to form a direct current.
  • the switch circuit 03 When the switch circuit 03 is turned on, the rectifier circuit and the The passage between the voltage circuits is turned on, and the DC power is input to the boost circuit 04 through the switch circuit 03, and the boost circuit 04 is charged. That is, the boost voltage 04 boosts the output voltage of the magnetic induction circuit 01 to make it reach the startup voltage of the chip where the charging circuit is located, so as to charge the device.
  • the booster circuit 04 may include a charge-discharge circuit.
  • the charge-discharge circuit is first charged by the direct current output by the rectifier circuit, and then discharged to achieve the effect of boosting the output voltage of the magnetic induction circuit 01.
  • the boosted voltage It can satisfy the startup voltage of the chip where the charging circuit is located, so as to determine the startup of the chip, so that the device where the charging circuit is located can perform wireless charging, avoiding the deviation of the position of the magnetic induction circuit in the prior art, or the reduction of the inductance of the magnetic induction circuit.
  • the output voltage of the circuit is too small, so that the chip where the charging circuit is located is under-voltage and cannot be started, resulting in the situation where the device where the charging circuit is located cannot be charged.
  • the above charging circuit includes a magnetic induction circuit, a rectifier circuit, a switch circuit and a booster circuit, wherein the output end of the magnetism induction circuit is connected to the input end of the rectifier circuit, and the switch circuit is respectively connected to the rectifier circuit and the booster circuit.
  • the switch circuit can conduct the path between the rectifier circuit and the booster circuit, so that the booster circuit boosts the output voltage of the magnetic induction circuit.
  • the path between the rectifier circuit and the booster circuit is turned on, so that the booster circuit can be charged, thereby boosting the output voltage of the magnetic induction circuit.
  • the chip or device where the charging circuit is located can also be started based on the boosted output voltage, thus overcoming the undervoltage of the chip where the charging circuit is located due to the too small output voltage of the charging circuit.
  • it cannot be started, resulting in the problem that the device where the charging circuit is located cannot be charged.
  • the booster circuit 04 includes at least one charge and discharge circuit 040 , and the charge and discharge circuit 040 is connected to the switch circuit 03 .
  • the switch circuit 03 is used to turn on the path between the rectifier circuit 02 and the charging and discharging circuit 040, and charge the charging and discharging circuit 040 in the positive half cycle and the negative half cycle of the waveform of the output voltage of the magnetic induction circuit 01 respectively.
  • the charging and discharging circuit 040 is used to store electric charges when the current passes through, and plays the role of charging.
  • the switch circuit 03 when the switch circuit 03 is in an on state, the path between the rectifier circuit 02 and the charge and discharge circuit 040 is connected.
  • the charging and discharging circuit 040 is charged once; during the negative half cycle of the waveform of the output voltage of the magnetic induction circuit 01, the charging and discharging circuit 040 is charged once, and the output of the magnetic induction circuit 01 is charged once.
  • two charging operations for the charging and discharging circuit 040 can be realized, so that the output voltage of the charging and discharging circuit 040 is doubled, and the effect of boosting the output voltage of the charging circuit is achieved.
  • the charging operation of the charging and discharging circuit can be doubled within the working cycle of the output voltage of the magnetic induction circuit, thereby achieving a boosting effect of the output voltage.
  • the booster circuit 04 includes a first charging and discharging circuit 041 and a second charging and discharging circuit 042 , and the first charging and discharging circuit 041 and the second charging and discharging circuit 042 are respectively connected with the rectifier circuit 02 Connection, the switch circuit 03 is connected to the common terminal between the first charging and discharging circuit 041 and the second charging and discharging circuit 042 .
  • the first end of the first charge and discharge circuit 041 is connected to the output end of the rectifier circuit; the second end of the first charge and discharge circuit 041 is connected to the first end of the second charge and discharge circuit 042;
  • the second terminal of the charging and discharging circuit 042 is connected to the input terminal of the rectifier circuit.
  • the switch circuit 03 is connected to the common terminal of the first charge and discharge circuit 041 and the second charge and discharge circuit 042 , and optionally, the switch circuit 03 is connected to the connection midpoint of the first charge and discharge circuit 041 and the second charge and discharge circuit 042 .
  • the switch circuit 03 is used to conduct the passage between the rectifier circuit 02 and the first charging and discharging circuit 041 and the second charging and discharging circuit 042; and in the positive half cycle of the output voltage of the magnetic induction circuit 01, the first charging The discharge circuit 041 is charged, and the second charge and discharge circuit 042 is charged with direct current in the negative half cycle of the waveform of the output voltage of the magnetic induction circuit 01 .
  • the switch circuit 03 when the switch circuit 03 is in an on state, that is, in a state in which the rectifier circuit 02 is connected to the first charging and discharging circuit 041 and the second charging and discharging circuit 042, respectively, the first charging and discharging The charging operation of the discharging circuit 041 and the second charging and discharging circuit 042 .
  • the switch circuit 03 when the switch circuit 03 is turned on, in the positive half cycle of the waveform of the output voltage of the magnetic induction circuit 01 , the induced current generated by the magnetic induction circuit 01 flows through the rectifier circuit 02 , the first charge and discharge circuit 041 , and the switch circuit 03 .
  • the output voltage of the magnetic induction circuit is V
  • the first charge and discharge circuit 041 and the second charge and discharge circuit 042 are charge and discharge circuits of equal capacity
  • the first charge and discharge circuit 041 respectively charges V voltage, so that the output voltage of the boosting circuit is V+V, that is, the output voltage of the charging circuit is V+V, so as to achieve the effect of boosting the output voltage of the charging circuit.
  • the charging operation of the charging and discharging circuit can be realized within the working cycle of the output voltage of the magnetic induction circuit, thereby achieving the boosting effect of the output voltage.
  • the first charge and discharge circuit 041 includes at least one first capacitor C1
  • the second charge and discharge circuit 042 includes at least one second capacitor C2
  • the switch circuit 03 is connected with the first capacitor C1 and The common terminal between the first capacitors C1 is connected.
  • the switch circuit 03 is used to conduct the passage between the rectifier circuit 02 and the at least one first capacitor C1 and the at least one second capacitor C2; and in the positive half cycle of the output voltage of the magnetic induction circuit 01 A capacitor charging C1 charges at least one second capacitor C2 by direct current during the negative half cycle of the waveform of the output voltage of the magnetic induction circuit 01 .
  • the first charging and discharging circuit and the second charging and discharging circuit may include multiple capacitors, and increasing the number of capacitors increases the corresponding charge storage capacity, so that the output voltage of the charging circuit exhibits the effect of multiple boosting.
  • the switch circuit 03 when the switch circuit 03 is in an on state, that is, in a state in which the rectifier circuit 02 is connected to the first capacitor C1 and the second capacitor C2 respectively, the first capacitor C1 and the second capacitor C2 are respectively connected to each other.
  • the switch circuit 03 when the switch circuit 03 is turned on, in the positive half cycle of the output voltage of the magnetic induction circuit 01, the induced current generated by the magnetic induction circuit 01 flows through the transistor T1, the first capacitor C1, and the switch circuit 03 in the rectifier circuit 02.
  • a loop is formed to realize the charging operation of the first capacitor C1; in the negative half cycle of the output voltage of the magnetic induction circuit 01, the induced current generated by the magnetic induction circuit 01 flows through the switch circuit 03, the second capacitor C2, and the transistor in the rectifier circuit 02 T2 forms a loop to realize the charging operation of the second capacitor C2.
  • the output voltage of the magnetic induction circuit is V
  • the first capacitor C1 and the second capacitor C2 are of equal capacity
  • the first capacitor C1 and the second capacitor C2 are charged respectively, so that the first capacitor C1
  • the output voltage is V
  • the output voltage of the second capacitor C2 is also V
  • the output voltage of the first capacitor C1 and the second capacitor C2 add up to V+V, that is, the output voltage of the boost circuit reaches V+V
  • the output voltage of the charging circuit is made to reach V+V to achieve the effect of boosting the output voltage of the charging circuit; optionally, the boosted output voltage is determined according to the number of capacitors and the capacity of the capacitors in the boosting circuit.
  • the switch circuit 03 includes a drive circuit 031 and a switch tube 032; the output end of the drive circuit 031 is connected to the control end of the switch tube 032, and the switch tube 032 is also connected to the rectifier circuit 02 and the rectifier circuit 032 respectively.
  • the booster circuit 04 is connected;
  • the drive circuit 031 is used to control the conduction state of the switch tube 032 .
  • the drive circuit 031 outputs the signal required for the switch tube 032 to connect the switch tube.
  • the drive circuit 031 may determine the type of the output signal according to the type of the switch tube 032, and the signal may be a high-level signal or a low-level signal. Signal.
  • the output end of the drive circuit 031 is connected to the control end of the switch tube 032 , and the drive circuit 031 outputs a control signal to the switch tube 032 .
  • the control signal may be a high-level signal, or it may be As a low-level signal, the switch tube 032 triggers a conducting state after receiving the control signal, so as to conduct the path between the rectifier circuit 02 and the booster circuit 04 .
  • the on-state of the switch tube is controlled by the drive circuit.
  • This solution simply and effectively controls the on-off of the switch tube, so as to turn on the path between the rectifier circuit 02 and the booster circuit 04, so as to realize the The charging purpose of the booster circuit.
  • the switch tube 032 includes a first switch tube Q1; the control end of the first switch tube Q1 is connected to the output end of the driving circuit 031; the input end of the first switch tube Q1 is connected to the rectifier The circuit 02 is connected; the output end of the first switch tube Q1 is connected to the booster circuit 04 .
  • the first switch transistor Q1 may be a P-type MOS transistor or an N-type MOS transistor.
  • the control terminal of the first switch transistor Q1 is connected to the output terminal of the driving circuit 031 for receiving the control signal output by the driving circuit 031 .
  • the control signal output by the drive circuit 031 is a high-level signal
  • the control signal output by the drive circuit 031 is A low-level signal is not limited in this embodiment.
  • the control signal output by the drive circuit 031 is a high-level signal
  • the first switch transistor Q1 receives a high-level signal to trigger the connected state
  • the magnetic induction circuit 01 In the positive half cycle of the output voltage waveform, the induced current generated by the magnetic induction circuit 01 flows through the transistor T1, the first capacitor C1, and the first switch tube Q1 in the rectifier circuit 02 to form a loop to realize the charging operation of the first capacitor C1; In the negative half cycle of the output voltage of the magnetic induction circuit 01, the induced current generated by the magnetic induction circuit 01 flows through the first switch tube Q1, the second capacitor C2, and the transistor T2 in the rectifier circuit 02 to form a loop to charge the second capacitor C2 operate.
  • the first capacitor C1 and the second capacitor C2 are charge and discharge circuits of equal capacity, and in a complete waveform cycle of the magnetic induction circuit, the first capacitor C1 and the second capacitor C2 are respectively charged with V voltage.
  • the output voltage of the first end of the first capacitor and the second end of the second capacitor is V+V, that is, the output voltage of the boost circuit reaches V+V, that is, the output voltage of the charging circuit is V+ V, so as to achieve the effect of boosting the output voltage of the charging circuit.
  • the switch tube is a switch tube, and the on-off control of the switch tube is realized through the driving circuit.
  • the switch tube 032 includes a second switch tube Q2 and a third switch tube Q3; the output end of the driving circuit 031 is respectively connected with the control end of the second switch tube Q2 and the third switch tube The control terminal of Q3 is connected.
  • the output end of the second switch tube Q2 is connected to the input end of the third switch tube Q3 ; the input end of the second switch tube Q2 is connected to the rectifier circuit 02 ; the output end of the third switch tube Q3 is connected to the boost circuit 04 .
  • the switch tube 032 is provided with a second switch tube Q2 and a third switch tube Q3, and the two transistors are set back to back, that is, the output end of the second switch tube Q2 is connected to the input end of the third switch tube Q3; the second switch tube Q2 is connected to the input end of the third switch tube Q3; The input end of the tube Q2 is connected to the rectifier circuit 02; the output end of the third switch tube Q3 is connected to the booster circuit 04 to achieve the effect of preventing leakage.
  • the second switch tube Q2 and the third switch tube Q3 are arranged back-to-back, and are grounded between the second switch tube Q2 and the third switch tube Q3, which can prevent the voltages borne by the switch tubes from being inconsistent, resulting in The switch tube with high pressure at both ends is broken down, and the leakage accident caused by the electric leakage accident realizes the effect of preventing electric leakage and increases the safety of the charging circuit.
  • the input terminal of the driving circuit 031 is connected to the output terminal of the magnetic induction circuit 01 ; the driving circuit 031 is used to turn on the switch tube 032 through the output voltage of the magnetic induction circuit 01 .
  • the input end of the driving circuit 031 can be connected to the output end of the magnetic induction circuit 01 , and the output voltage of the magnetic induction circuit 01 drives the switch tube 032 to conduct.
  • the driving circuit 031 includes a first transistor T5, a second transistor T6, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first load R1, The second load R2 and the first voltage regulator transistor TV1.
  • the input end of the first transistor T5 is connected to the first end of the magnetic induction circuit 01
  • the output end of the first transistor T6 is connected to the first end of the third capacitor C3
  • the second end of the third capacitor C3 is connected to the second end of the magnetic induction circuit 01. end connection.
  • the induced current generated by the magnetic induction circuit 01 can flow from the first end of the magnetic induction circuit 01 to the second end through T5 and C3 to realize the charging operation for C3.
  • the first end of the fourth capacitor C4 is connected to the second end of the magnetic induction circuit 01, the second end of the fourth capacitor C4 is connected to the input end of the second transistor T6, and the output end of the second transistor T6 is connected to the first end of the magnetic induction circuit 01. connected at one end.
  • the induced current generated by the magnetic induction circuit 01 can flow from the second end of the magnetic induction circuit 01 to the first end through C4 and T6 to realize the charging operation for C4.
  • the first terminal of the third capacitor C3 is connected to the first terminal of the first load R1, the second terminal of the first load R1 is connected to the first terminal of the second load R2, and the second terminal of the second load R2 is connected to the first terminal of the first load R1.
  • the input terminal of the voltage transistor TV1 is connected; the first terminal of the fifth capacitor C5 is connected to the common terminal between the first load R1 and the second load R2, and the second terminal of the fifth capacitor C5 is connected to the second terminal of the fourth capacitor C4 connect.
  • the voltage difference formed by the first terminal of C3 and the second terminal of C4 reaches the output terminal through R1 , R2 and TV1 to form a control signal and output to the control terminal of the switch tube 032 .
  • the second end of the fourth capacitor C4, the second end of the fifth capacitor C5, and the second end of the second load R2 are all grounded.
  • grounding protection is provided at the common ends of C4, C5 and R2 to improve the safety of the driving circuit.
  • the switch tube can be driven to be turned on based on the output voltage of the magnetic induction circuit, no additional device needs to be added, and development cost and maintenance cost are saved.
  • the input terminal of the driving circuit 031 is connected to the driving pin of the rectifying circuit 02 , and the driving circuit 031 is used to turn on the switch tube through the driving voltage of the rectifying circuit.
  • the input end of the driving circuit 031 can be connected to the driving pin of the rectifying circuit 02, and the switching tube 032 is driven to conduct by the driving voltage of the rectifying circuit.
  • the driving circuit 031 includes a second voltage regulator transistor TV2 , a sixth capacitor C6 , a seventh capacitor C7 , a third load R3 and a fourth load R4 .
  • the input end of the second voltage-stabilizing transistor TV2 is connected to the driving pin of the rectifier circuit 02, and the output end of the second voltage-stabilizing transistor TV2 is respectively connected to the first end of the sixth capacitor C6 and the first end of the seventh capacitor C7; The second end of the six capacitors C6 and the second end of the seventh capacitor C7 are both grounded.
  • the output end of the second voltage regulator transistor TV2 is connected to the first end of the third load R3; the second end of the third load R3 is connected to the first end of the fourth load R4; the second end of the fourth load R4 is grounded.
  • the common terminal between the third load R3 and the fourth load R4 is connected to the control terminal of the switch tube 032 .
  • the drive circuit 031 obtains the voltage from the drive pin of the rectifier circuit, and outputs it to the control terminal of the switch tube through the second voltage-stabilizing transistors TV2 and R3 to turn on the switch tube without adding additional devices. , saving development costs and hardware costs.
  • This embodiment does not limit the driving circuit itself and the connection of the input end of the driving circuit.
  • the driving circuit 031 further includes a bias unit 0311; the output end of the bias unit 0311 is connected to the input end of the second voltage-stabilizing transistor TV2; the bias unit is used to The input voltage of the two regulator transistors TV2 is boosted to boost the output voltage of the driving circuit 031 .
  • the biasing unit 0311 includes a third voltage regulator transistor TV3 , an eighth capacitor C8 and a fifth load R5 .
  • the input end of the fifth load R5 is connected with the drive pin of the bias unit, the output end of the fifth load R5 is connected with the input end of the third voltage stabilization transistor TV3; the first end of the eighth capacitor C8 is connected with the third voltage stabilization transistor
  • the input terminal of TV3 is connected, and the second terminal of the eighth capacitor C8 is grounded.
  • the output terminal of the third voltage-stabilizing transistor TV3 is connected to the input terminal of the second voltage-stabilizing transistor TV2.
  • the input terminal of the biasing unit 0311 is connected to the driving pin of the preset biasing unit, and the output voltage is sent to the second voltage-stabilizing transistor TV2 through the load R4 and the third voltage-stabilizing transistor TV3 for increasing the voltage
  • the voltage in the driving circuit is increased to ensure that the output voltage of the driving circuit can meet the requirement of turning on the switch tube, and the reliability of the turn-on switch tube is ensured.
  • the driving circuit 031 is connected to the power supply circuit of the device where the charging circuit is located.
  • the output voltage of the power supply circuit of the device where the charging circuit is located can be directly used to turn on the switch tube, thereby reducing the hardware cost.
  • the switch tube can be turned on by the output voltage of the low dropout linear regulator LDO, the charge pump, etc.
  • a chip 2 is provided, and the chip 2 includes the charging circuit 1 in the above-mentioned embodiment.
  • the chip 2 includes the charging circuit 1 in any of the above-mentioned embodiments. Based on the chip 2, there is a deviation between the position of the chip and the magnetic induction circuit of the transmitting end, or the inductance of the magnetic induction circuit of the current chip decreases. In this case, the boosted output voltage can also be obtained based on the charging circuit, and the boosted output voltage is greater than or equal to the startup voltage of the chip where the charging circuit is located. The chip where the charging circuit is located cannot be started due to undervoltage, resulting in the problem that the device where the charging circuit is located cannot be charged.
  • a device 3 is provided, and the device 3 includes the chip 2 in the above-mentioned embodiment.
  • the boosted output voltage can also be obtained based on the charging circuit in the chip, and the boosted output voltage can also be obtained.
  • the output voltage is greater than or equal to the start-up voltage of the chip where the charging circuit is located. Therefore, it can ensure that the chip where the charging circuit is located can be started, and overcome the problem that the device where the charging circuit is located cannot be charged due to the undervoltage of the charging circuit and the inability to start the chip where the charging circuit is located.
  • a device 4 is provided, and the device 4 includes the charging circuit 1 in the above-described embodiment.
  • the boosted output voltage can also be obtained based on the charging circuit in the device, and the boosted output The voltage can meet the needs of starting the charging function, and overcome the problem that the device cannot start charging due to the undervoltage of the charging circuit.

Abstract

一种充电电路、芯片和设备，该充电电路包括：磁感应电路、整流电路、开关电路和升压电路，其中，磁感应电路的输出端与整流电路的输入端连接，开关电路分别与整流电路和升压电路连接。磁感应电路接收发射端所发出的电磁信号，根据电磁信号生成交流电，整流电路将交流电转换为直流电，开关电路导通整流电路和升压电路之间的通路，以使升压电路对磁感应电路的输出电压进行升压。在本方案中，通过控制开关电路导通整流电路与升压电路之间的通路，使得升压电路得以充电，从而对充电电路的输出电压进行升压，升压后的输出电压可以确保启动充电电路所在芯片，克服了由于充电电路欠压而无法启动充电电路所在芯片，导致充电电路所在设备无法充电的问题。

Description

充电电路、芯片和设备
相关申请
本申请要求2021年03月23日申请的，申请号为2021103084865，名称为“充电电路、芯片和设备”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及无线充电技术领域，特别是涉及一种充电电路、芯片和设备。
背景技术
无线充电系统包括无线充电发射端和无线充电接收端。无线充电接收端由接收端线圈、整流电路、以及输出电路组成。一般地，接收端线圈的电感量要求为8-9uh，现有技术中，为了增大无线充电接收端的接收电流，通常会减少接收端线圈的电感量，以得到更大功率的无线充电。
但是，接收端线圈的电感量减小，或，接收端线圈的位置出现偏移的情况下，均会导致无线充电接收端出现欠压情况，从而无法启动无线充电接收端中的接收端芯片。
发明内容
本申请实施例提供了一种信息显示方法、装置、电子设备、计算机可读存储介质，可以直观、清晰的获知第二终端与第一终端的连接状态。
一种充电电路，其特征在于，包括：
磁感应电路、整流电路、开关电路和升压电路；所述磁感应电路的输出端与所述整流电路的输入端连接，所述开关电路分别与所述整流电路和所述升压电路连接；
所述磁感应电路，用于接收发射端所发出的电磁信号，根据所述电磁信号生成交流电；
所述整流电路，用于将所述交流电转换为直流电；
所述开关电路，用于导通所述整流电路和所述升压电路之间的通路，通过所述直流电对所述升压电路进行充电；
所述升压电路，用于对所述磁感应电路的输出电压进行升压。
优选的，所述升压电路包括至少一个充放电电路，所述充放电电路与所述开关电路连接；
所述开关电路，用于导通所述整流电路和所述充放电电路之间的通路，并在所述磁感应电路的输出电压的波形的正半周和负半周分别对所述充放电电路进行充电。
优选的，所述升压电路包括第一充放电电路和第二充放电电路，所述第一充放电电路和所述第二充放电电路分别与所述整流电路连接，所述开关电路与所述第一充放电电路和所述第二充放电电路之间的公共端连接；
所述开关电路，用于导通所述整流电路与所述第一充放电电路和所述第二充放电电路之间的通路；并在所述磁感应电路的输出电压的波形的正半周，通过所述直流电对所述第一充放电电路充电，在所述磁感应电路的输出电压的波形的负半周，通过所述直流电对所述第二充放电电路充电。
优选的，所述第一充放电电路包括至少一个第一电容，所述第二充放电电路包括至少一个第二电容；所述第一电容和所述第二电容分别与所述整流电路连接，所述开关电路与所述第一电容和所述第二电容之间的公共端连接；
所述开关电路，用于导通所述整流电路与所述至少一个第一电容和所述至少一个第二电 容之间的通路；并在所述磁感应电路的输出电压的波形的正半周，通过所述直流电对所述至少一个第一电容充电，在所述磁感应电路的输出电压的波形的负半周，通过所述直流电对所述至少一个第二电容充电。
优选的，所述开关电路包括驱动电路和至少一个开关管；
所述驱动电路的输出端与所述开关管的控制端连接，所述开关管还分别与所述整流电路和所述升压电路连接；
所述驱动电路，用于控制所述开关管的导通状态。
优选的，所述开关管包括第一开关管；所述第一开关管的控制端与所述驱动电路的输出端连接；所述第一开关管的输入端与所述整流电路连接；所述第一开关管的输出端与所述升压电路连接。
优选的，所述开关管包括第二开关管和第三开关管；
所述驱动电路的输出端分别与所述第二开关管的控制端和所述第三开关管的控制端连接；
所述第二开关管的输出端与所述第三开关管的输入端连接；所述第二开关管的输入端与所述整流电路连接；所述第三开关管的输出端与所述升压电路连接。
优选的，所述驱动电路的输入端与所述磁感应电路的输出端连接；
所述驱动电路，用于通过所述磁感应电路的输出电压导通所述开关管。
优选的，所述驱动电路包括第一晶体管、第二晶体管、第三电容、第四电容、第五电容、第一负载、第二负载和第一稳压晶体管；
所述第一晶体管的输入端与所述磁感应电路的第一端连接，所述第一晶体管的输出端与所述第三电容的第一端连接，所述第三电容的第二端与所述磁感应电路的第二端连接；
所述第四电容的第一端连接与所述磁感应电路的第二端连接，所述第四电容的第二端与所述第二晶体管的输入端连接，所述第二晶体管的输出端与所述磁感应电路的第一端连接；
所述第三电容的第一端与所述第一负载的第一端连接，所述第一负载的第二端与所述第二负载的第一端连接，所述第二负载的第二端与所述第一稳压晶体管的输入端连接；
所述第五电容的第一端与所述第一负载、所述第二负载之间的公共端连接，所述第五电容的第二端与所述第四电容的第二端连接；
所述第四电容的第二端、所述第五电容的第二端、所述第二负载的第二端均接地；
所述第一稳压晶体管的输出端与所述开关管的控制端连接。
优选的，所述驱动电路的输入端与所述整流电路的驱动引脚连接；
所述驱动电路，用于通过所述整流电路的驱动电压导通所述开关管。
优选的，所述驱动电路包括第二稳压晶体管、第六电容、第七电容、第三负载和第四负载；
所述第二稳压晶体管的输入端与所述整流电路的驱动引脚连接，所述第二稳压晶体管的输出端分别与所述第六电容的第一端、所述第七电容的第一端连接；所述第六电容的第二端、所述第七电容的第二端均接地；
所述第二稳压晶体管的输出端还与所述第三负载的第一端连接；所述第三负载的第二端与所述第四负载的第一端连接；所述第四负载的第二端接地；
所述第三负载与所述第四负载之间的公共端与所述开关管的控制端连接。
优选的，所述驱动电路还包括偏置单元；所述偏置单元的输出端与所述第二稳压晶体管的输入端连接；
所述偏置单元，用于对所述第二稳压晶体管的输入电压进行升压，以使所述驱动电路的 输出电压进行升压。
优选的，所述偏置单元包括第三稳压晶体管、第八电容和第五负载；
所述第五负载的输入端与所述偏置单元的驱动引脚连接，所述第五负载的输出端与所述第三稳压晶体管的输入端连接；所述第八电容的第一端与所述第三稳压晶体管的输入端连接，所述第八电容的第二端接地；
所述第三稳压晶体管的输出端与所述第二稳压晶体管的输入端连接。
优选的，所述驱动电路与所述充电电路所在设备的电源电路连接；
所述驱动电路，用于通过所述电源电路的输出电压导通所述开关管。
优选的，所述电源电路包括低压差线性稳压器和/或电荷泵。
一种芯片，该芯片包括所述充电电路。
一种设备，该设备包括所述芯片。
一种设备，该设备包括所述充电电路。
上述充电电路、芯片和设备，充电电路包括：磁感应电路、整流电路、开关电路和升压电路，其中，磁感应电路的输出端与整流电路的输入端连接，开关电路分别与整流电路和升压电路连接。磁感应电路接收发射端所发出的电磁信号，根据电磁信号生成交流电，整流电路将交流电转换为直流电，开关电路可以导通整流电路和升压电路之间的通路，以使升压电路对磁感应电路的输出电压进行升压。在本方案中，通过控制开关电路的连通状态，从而导通整流电路与升压电路之间的通路，使得升压电路得以充电，从而对磁感应电路的输出电压进行升压，在出现磁感应电路的位置出现偏差，或者磁感应电路的电感量减少的情况下，也可以基于升压后的输出电压启动充电电路所在的芯片或设备，从而克服了由于充电电路输出电压过小，充电电路所在芯片欠压而无法启动，导致充电电路所在设备无法充电的问题。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为一个实施例中无线充电的环境示意图；
图2为一个实施例中充电电路的电路结构示意图；
图3为一个实施例中充电电路的电路结构示意图；
图4为一个实施例中充电电路的电路结构示意图；
图5为一个实施例中充电电路的电路结构示意图；
图6为一个实施例中充电电路的电路结构示意图；
图7为一个实施例中充电电路的电路结构示意图；
图8为一个实施例中充电电路的电路结构示意图；
图9为一个实施例中充电电路的电路结构示意图；
图10为一个实施例中充电电路的电路结构示意图；
图11为一个实施例中充电电路的电路结构示意图；
图12为一个实施例中充电电路的电路结构示意图；
图13为一个实施例中充电电路的电路结构示意图；
图14为一个实施例中充电电路的电路结构示意图；
图15为一个实施例中芯片的结构示意图；
图16为一个实施例中设备的结构示意图；
图17为一个实施例中设备的结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
可以理解，本申请所使用的术语“第一”、“第二”等可在本文中用于描述各种元件，但这些元件不受这些术语限制。这些术语仅用于将第一个元件与另一个元件区分。举例来说，在不脱离本申请的范围的情况下，可以将第一客户端称为第二客户端，且类似地，可将第二客户端称为第一客户端。第一客户端和第二客户端两者都是客户端，但其不是同一客户端。
如图1所示，无线充电场景中包括无线充电发射端和无线充电接收端。其中，无线充电发射端的电路包括电源V、逆变电路B、电容C P、发射端磁感应线圈L P，发射端感应线圈L P与电容C P形成谐振电路。可选地，逆变电路B与电源V连接，用于对电源V发出的直流电进行逆变转换，向电容C P输出逆变转换之后的交流电，交流电通过谐振电路产生磁感应信号和磁感应电动势V P。
无线充电接收端的充电电路包括接收端磁感应线圈L S、电容C S、电容C d、调制电路M C、整流电路R C、以及输出电容C、输出负载R m，其中，接收端磁感应线圈L S与电容C S、电容C d形成接收回路。可选地，接收回路接收发射端磁感应线圈L P产生磁感应信号，形成相应的磁感应交流电流，磁感应交流电流经过调制电路M C输入至整流电路R C中，整流电路R C将接收到的交流电流转换为直流电流，直流电流经过输出电容C、输出负载R m，形成充电电路的输出电压，该输出电压用于启动充电电路所在芯片，当该芯片被启动可以实现对包含芯片的设备进行无线充电的操作。
无线充电接收端的接收端磁感应线圈L S会影响充电电路的输出电压，即，接收端磁感应线圈L S电感量减少，则形成相应的磁感应交流电流减小，充电电路的输出电压也会减小；其中，接收端磁感应线圈L S电感量减少的情况包括接收端磁感应线圈匝数变少，或者接收端磁感应线圈L S与发射端磁感应线圈L P的相对位置发生偏移。在充电电路的输出电压减小的情况下，可能造成充电电路所在芯片欠压无法启动，从而导致充电电路所在设备无法充电。
为了解决这个问题，本实施例提出一种充电电路、芯片和设备，通过对充电电路的输出电压进行升压，保证充电电路的输出电压始终大于或等于充电电路所在芯片的启动电压，克服由于充电电路输出电压过小，导致充电电路所在芯片欠压无法启动，从而充电电路所在设备无法充电的问题，以下通过具体实施例来解释说明。
图2提供一种充电电路1，如图2所示，充电电路1包括：磁感应电路01、整流电路02、开关电路03和升压电路04；磁感应电路01的输出端与整流电路02的输入端连接，开关电路03分别与整流电路02和升压电路04连接。
磁感应电路01，用于接收发射端所发出的电磁信号，根据电磁信号生成交流电；整流电路02，用于将交流电转换为直流电；开关电路03，用于导通整流电路02和升压电路04之间的通路，通过直流电对升压电路04进行充电；升压电路04，用于对磁感应电路01的输出电压进行升压。
其中，磁感应电路01可以包括磁感应线圈、电感器等；磁感应电路01用于接收发射端的磁感应电路所发出的电磁信号，从而形成感应电动势和/或感应交流电流。整流电路02用于将交流电转换为直流电，整流电路02可以为全桥整流电路，示例地，全桥整流电路可以由4个晶体管组成。开关电路03可以为晶体管组成的电路，示例地，晶体管可以为开关管，例如，二极管、三极管、场效应晶体管，也可以是普通的电路开关器件。升压电路04可以包括电容，电容用于存储充电电路中的电荷，起到充电的作用。
在本实施例中，磁感应电路01接收发射端的磁感应电路所发出的电磁信号，形成感应交流电流，磁感应电路01输出的交流电经过整流电路02形成直流电，当开关电路03导通时，整流电路与升压电路之间的通路被导通，直流电经过开关电路03输入到升压电路04，升压电路04进行充电，当升压电压04的充电量达到一定程度再放电，起到升压的作用，也即，升压电压04对磁感应电路01的输出电压进行升压，使其达到充电电路所在芯片的启动电压，从而为设备进行充电。
示例地，升压电路04中可以包括充放电电路，充放电电路先通过整流电路输出的直流电进行充电，然后再放电，达到对磁感应电路01的输出电压进行升压的效果，升压后的电压可以满足充电电路所在芯片的启动电压，从而确定该芯片启动，使得充电电路所在的设备可以进行无线充电，避免了现有技术中磁感应电路的位置出现偏差，或者磁感应电路的电感量减少而导致充电电路输出电压过小，使得充电电路所在芯片欠压而无法启动，导致充电电路所在设备无法充电的情况。
上述充电电路包括磁感应电路、整流电路、开关电路和升压电路，其中，磁感应电路的输出端与整流电路的输入端连接，开关电路分别与整流电路和升压电路连接。开关电路可以导通整流电路和升压电路之间的通路，以使升压电路对磁感应电路的输出电压进行升压。在本方案中，通过控制开关电路的连通状态，从而导通整流电路与升压电路之间的通路，使得升压电路得以充电，从而对磁感应电路的输出电压进行升压，在出现磁感应电路的位置出现偏差，或者磁感应电路的电感量减少的情况下，也可以基于升压后的输出电压启动充电电路所在的芯片或设备，从而克服了由于充电电路输出电压过小，充电电路所在芯片欠压而无法启动，导致充电电路所在设备无法充电的问题。
在其中一个实施例中，如图3所示，升压电路04包括至少一个充放电电路040，充放电电路040与开关电路03连接。
开关电路03，用于导通整流电路02和充放电电路040之间的通路，并在磁感应电路01的输出电压的波形的正半周和负半周分别对充放电电路040进行充电。
其中，充放电电路040用于在电流通过时存储电荷，起到充电的作用。在本实施例中，开关电路03在导通的状态下，连通整流电路02和充放电电路040之间的通路。在磁感应电路01的输出电压的波形的正半周，对充放电电路040进行一次充电；在磁感应电路01的输出电压的波形的负半周，对充放电电路040进行一次充电，在磁感应电路01的输出电压的波形的一个完整周期内，可以实现对充放电电路040的两次充电操作，使得充放电电路040的输出电压呈2倍增加，达到充电电路的输出电压升压的效果。
在本实施例中，通过在充电电路中构建开关电路与充放电电路，可以在磁感应线路的输出电压的工作周期内实现对充放电电路的2倍充电操作，从而达到输出电压的升压效果。
在其中一个实施例中，如图4所示，升压电路04包括第一充放电电路041和第二充放电电路042，第一充放电电路041和第二充放电电路042分别与整流电路02连接，开关电路03与第一充放电电路041和第二充放电电路042之间的公共端连接。
其中，如图4所示，第一充放电电路041的第一端与整流电路的输出端连接；第一充放 电电路041的第二端与第二充放电电路042的第一端连接；第二充放电电路042的第二端与整流电路的输入端连接。开关电路03与第一充放电电路041和第二充放电电路042的公共端连接，可选地，开关电路03与第一充放电电路041和第二充放电电路042的连接中点连接。
开关电路03，用于导通整流电路02与第一充放电电路041和第二充放电电路042之间的通路；并在磁感应电路01的输出电压的波形的正半周，通过直流电对第一充放电电路041充电，在磁感应电路01的输出电压的波形的负半周，通过直流电对第二充放电电路042充电。
在本实施例中，开关电路03在导通的状态下，即将整流电路02分别与第一充放电电路041、第二充放电电路042之间通路导通的状态下，分别实现对第一充放电电路041、第二充放电电路042的充电操作。示例地，开关电路03导通的状态下，在磁感应电路01的输出电压的波形的正半周，磁感应电路01产生的感应电流流经整流电路02、第一充放电电路041、以及开关电路03形成回路，实现对第一充放电电路041的充电操作；在磁感应电路01的输出电压的波形的负半周，磁感应电路01产生的感应电流流经开关电路03、第二充放电电路042、以及整流电路02形成回路，实现对第二充放电电路042的充电操作。这样，假设磁感应电路输出电压为V，第一充放电电路041、第二充放电电路042为相等容量的充放电电路，在磁感应电路的输出电压的一个完整波形周期，为第一充放电电路041、第二充放电电路042分别充V电压，使得升压电路的输出电压为V+V，也即，使得充电电路的输出电压为V+V，达到对充电电路的输出电压升压的效果。
在本实施例中，通过在充电电路中构建开关电路与多个充放电电路，可以在磁感应线路的输出电压的工作周期内实现对充放电电路的充电操作，从而达到输出电压的升压效果。
在其中一个实施例中，如图5所示，第一充放电电路041包括至少一个第一电容C1，第二充放电电路042包括至少一个第二电容C2；开关电路03与第一电容C1和第一电容C1之间的公共端连接。
开关电路03，用于导通整流电路02与至少一个第一电容C1和至少一个第二电容C2之间的通路；并在磁感应电路01的输出电压的波形的正半周，通过直流电对至少一个第一电容充电C1，在磁感应电路01的输出电压的波形的负半周，通过直流电对至少一个第二电容充电C2。
其中，第一充放电电路、第二充放电电路中均可以包括多个电容，增加电容的数量即增加相应的电荷存储容量，使得充电电路的输出电压呈现多倍升压的效果。
在本实施例中，开关电路03在导通的状态下，即将整流电路02分别与第一电容C1、第二电容C2之间通路导通的状态下，分别实现对第一电容C1、第二电容C2的充电操作。示例地，开关电路03导通的状态下，在磁感应电路01的输出电压的波形正半周，磁感应电路01产生的感应电流流经整流电路02中的晶体管T1、第一电容C1、以及开关电路03形成回路，实现对第一电容C1的充电操作；在磁感应电路01的输出电压的波形负半周，磁感应电路01产生的感应电流流经开关电路03、第二电容C2、以及整流电路02中的晶体管T2形成回路，实现对第二电容C2的充电操作。这样，假设磁感应电路输出电压为V，第一电容C1、第二电容C2为相等容量，在磁感应电路的一个完整波形周期，为第一电容C1、第二电容C2分别充电，使得第一电容C1的输出电压为V，第二电容C2的输出电压也为V，则第一电容C1和第二电容C2的输出电压加起来为V+V，即，使得升压电路的输出电压达到V+V，也即，使得充电电路的输出电压达到V+V，实现充电电路的输出电压升压的效果；可选地，升压后的输出电压根据升压电路中的电容数量和电容容量确定。
在本实施例中，通过在充电电路中构建开关电路与多个电容，可以实现在磁感应线路的工作周期，实现对第一电容、第二电容的充电操作，从而达到对升压电路的输出电压升压的 效果。
在其中一个实施例中，如图6所示，开关电路03包括驱动电路031和开关管032；驱动电路031的输出端与开关管032的控制端连接，开关管032还分别与整流电路02和升压电路04连接；
驱动电路031，用于控制开关管032的导通状态。
其中，驱动电路031为开关管032输出连通开关管所需要的信号，示例地，驱动电路031可以根据开关管032的类型确定输出信号的类型，该信号可以为高电平信号，或低电平信号。
在本实施例中，如图6所示，驱动电路031的输出端与开关管032的控制端连接，驱动电路031向开关管032输出控制信号，该控制信号可以为高电平信号，也可以为低电平信号，开关管032在接收到该控制信号之后，触发导通状态，以导通整流电路02与升压电路04之间的通路。
在本实施例中，通过驱动电路控制开关管的导通状态，该方案简单、有效地控制了开关管的通断，实现导通整流电路02与升压电路04之间的通路，从而实现对升压电路的充电的目的。
在其中一个实施例中，如图7所示，开关管032包括第一开关管Q1；第一开关管Q1的控制端与驱动电路031的输出端连接；第一开关管Q1的输入端与整流电路02连接；第一开关管Q1的输出端与升压电路04连接。
其中，第一开关管Q1可以为P型MOS管，也可以为N型MOS管。第一开关管Q1的控制端与驱动电路031的输出端连接，用于接收驱动电路031输出的控制信号。示例地，当第一开关管Q1为N型MOS管时，驱动电路031输出的控制信号为高电平信号；当第一开关管Q1为P型MOS管时，驱动电路031输出的控制信号为低电平信号，本实施例对此不做限定。
在本实施例中，当第一开关管Q1为N型MOS管时，驱动电路031输出的控制信号为高电平信号，第一开关管Q1接收高电平信号触发连通状态，在磁感应电路01的输出电压的波形正半周，磁感应电路01产生的感应电流流经整流电路02中的晶体管T1、第一电容C1、以及第一开关管Q1形成回路，实现对第一电容C1的充电操作；在磁感应电路01的输出电压的波形负半周，磁感应电路01产生的感应电流流经第一开关管Q1、第二电容C2、以及整流电路02中的晶体管T2形成回路，实现对第二电容C2的充电操作。这样，假设磁感应电路输出电压为V，第一电容C1、第二电容C2为相等容量的充放电电路，在磁感应电路的一个完整波形周期，为第一电容C1、第二电容C2分别充V电压，使得第一电容的第一端与第二电容的第二端的输出电压为V+V，即，使得升压电路的输出电压达到V+V，也即，使得充电电路的输出电压为V+V，从而实现充电电路的输出电压升压的效果。
在本实施例中，开关管采用开关管，通过驱动电路实现对开关管的通断控制，该方案有效地实现了开关管的控制，从而有效地实现了对充电电路的升压操作。
在其中一个实施例中，如图8所示，开关管032包括第二开关管Q2和第三开关管Q3；驱动电路031的输出端分别与第二开关管Q2的控制端和第三开关管Q3的控制端连接。
第二开关管Q2的输出端与第三开关管Q3的输入端连接；第二开关管Q2的输入端与整流电路02连接；第三开关管Q3的输出端与升压电路04连接。
其中，开关管032中设置第二开关管Q2和第三开关管Q3，两颗晶体管设置为背靠背设置，即第二开关管Q2的输出端与第三开关管Q3的输入端连接；第二开关管Q2的输入端与整流电路02连接；第三开关管Q3的输出端与升压电路04连接，实现防漏电效果。
在本实施例中，第二开关管Q2和第三开关管Q3背靠背设置，且在第二开关管Q2和第 三开关管Q3之间接地，可以防止开关管上承担的电压不一致，而导致的两端压力较大的开关管被击穿，而造成的漏电事故，实现了防漏电的效果，增加了充电电路的安全性。
在其中一个实施例中，如图9所示，驱动电路031的输入端与磁感应电路01的输出端连接；驱动电路031用于通过磁感应电路01的输出电压导通开关管032。驱动电路031的输入端可以与磁感应电路01的输出端连接，通过磁感应电路01的输出电压驱动开关管032导通。
可选地，在一个实施例中，如图10所示，驱动电路031包括第一晶体管T5、第二晶体管T6、第三电容C3、第四电容C4、第五电容C5、第一负载R1、第二负载R2和第一稳压晶体管TV1。
第一晶体管T5的输入端与磁感应电路01的第一端连接，第一晶体管T6的输出端与第三电容C3的第一端连接，第三电容C3的第二端与磁感应电路01的第二端连接。
在本实施例中，磁感应电路01产生的感应电流可以从磁感应电路01的第一端经过T5、C3流至第二端，实现为C3的充电操作。
第四电容C4的第一端连接与磁感应电路01的第二端连接，第四电容C4的第二端与第二晶体管T6的输入端连接，第二晶体管T6的输出端与磁感应电路01的第一端连接。
在本实施例中，磁感应电路01产生的感应电流可以从磁感应电路01的第二端经过C4、T6流至第一端，实现为C4的充电操作。
第三电容C3的第一端与第一负载R1的第一端连接，第一负载R1的第二端与第二负载R2的第一端连接，第二负载R2的第二端与第一稳压晶体管TV1的输入端连接；第五电容C5的第一端与第一负载R1、第二负载R2之间的公共端连接，第五电容C5的第二端与第四电容C4的第二端连接。
在本实施例中，C3的第一端与C4的第二端形成的电压差经过R1、R2、TV1到达输出端，形成控制信号，输出至开关管032的控制端。
第四电容C4的第二端、第五电容C5的第二端、第二负载R2的第二端均接地。可选地，在C4、C5、R2的公共端设置有接地保护，提高驱动电路的安全性。
在本实施例中，可以基于磁感应电路的输出电压来驱动开关管导通，不需要增设额外的器件，节省了开发成本和维护成本。
在其中一个实施例中，如图11所示，驱动电路031的输入端与整流电路02的驱动引脚连接，驱动电路031，用于通过整流电路的驱动电压导通开关管。其中，驱动电路031的输入端可以与整流电路02的驱动引脚连接，通过整流电路的驱动电压驱动开关管032导通。
可选地，在其中一个实施例中，如图12所示，驱动电路031包括第二稳压晶体管TV2、第六电容C6、第七电容C7、第三负载R3和第四负载R4。
第二稳压晶体管TV2的输入端与整流电路02的驱动引脚连接，第二稳压晶体管TV2的输出端分别与第六电容C6的第一端、第七电容C7的第一端连接；第六电容C6的第二端、第七电容C7的第二端均接地。
第二稳压晶体管TV2的输出端与第三负载R3的第一端连接；第三负载R3的第二端与第四负载R4的第一端连接；第四负载R4的第二端接地。
第三负载R3与第四负载R4之间的公共端与开关管032的控制端连接。
在本实施例中，驱动电路031的从整流电路的驱动引脚处获取电压，经过第二稳压晶体管TV2、R3输出至开关管的控制端，以导通开关管，不需要增设额外的器件，节省了开发成本和硬件成本。本实施例对驱动电路本身、驱动电路输入端连接不做限定。
在其中一个实施例中，如图13所示，驱动电路031还包括偏置单元0311；偏置单元0311的输出端与第二稳压晶体管TV2的输入端连接；偏置单元，用于对第二稳压晶体管TV2的 输入电压进行升压，以使驱动电路031的输出电压进行升压。
可选地，在其中一个实施例中，如图14所示，偏置单元0311包括第三稳压晶体管TV3、第八电容C8和第五负载R5。第五负载R5的输入端与偏置单元的驱动引脚连接，第五负载R5的输出端与第三稳压晶体管TV3的输入端连接；第八电容C8的第一端与第三稳压晶体管TV3的输入端连接，第八电容C8的第二端接地。第三稳压晶体管TV3的输出端与第二稳压晶体管TV2的输入端连接。
在本实施例中，偏置单元0311的输入端与预设的偏置单元的驱动引脚连接，经过负载R4、第三稳压晶体管TV3，输出电压至第二稳压晶体管TV2，用于增大驱动电路中的电压，从而保证驱动电路的输出电压能够满足导通开关管的需求，保证了导通开关管的可靠性。
在其中一个实施例中，驱动电路031与充电电路所在设备的电源电路连接。在本实施例中，可以直接采用充电电路所在设备的电源电路的输出电压来导通开关管，降低硬件成本。例如，可以通过低压差线性稳压器LDO、电荷泵charge Pump等的输出电压来导通开关管。
在一个实施例中，如图15所示，提供一种芯片2，该芯片2包括上述实施例中充电电路1。
在本实施例中，芯片2中包括上述任一实施例中的充电电路1，基于该芯片2，在出现芯片与发射端磁感应电路的位置出现偏差，或者当前芯片的磁感应电路的电感量减少的情况下，也可以基于该充电电路得到升压后的输出电压，升压后的输出电压大于或等于充电电路所在芯片的启动电压，因此，可以确保启动充电电路所在的芯片，克服了由于充电电路欠压而无法启动充电电路所在芯片，导致充电电路所在设备无法充电的问题。
在一个实施例中，如图16所示，提供一种设备3，该设备3包括上述实施例中的芯片2。
在本实施例中，在设备与充电端的位置出现偏差，或者当前设备的磁感应电路的电感量减少的情况下，也可以基于该芯片中的充电电路得到升压后的输出电压，升压后的输出电压大于或等于充电电路所在芯片的启动电压，因此，可以确保启动充电电路所在的芯片，克服了由于充电电路欠压而无法启动充电电路所在芯片，导致充电电路所在设备无法充电的问题。
在一个实施例中，如图17所示，提供一种设备4，该设备4包括上述实施例中充电电路1。
在本实施例中，在设备与充电端的位置出现偏差，或者当前设备的磁感应电路的电感量减少的情况下，也可以基于设备中的充电电路得到升压后的输出电压，升压后的输出电压可以满足启动充电功能的需求，克服了由于充电电路欠压而导致设备无法启动充电问题。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种充电电路，其特征在于，包括：
    磁感应电路、整流电路、开关电路和升压电路；所述磁感应电路的输出端与所述整流电路的输入端连接，所述开关电路分别与所述整流电路和所述升压电路连接；
    所述磁感应电路，用于接收发射端所发出的电磁信号，根据所述电磁信号生成交流电；
    所述整流电路，用于将所述交流电转换为直流电；
    所述开关电路，用于导通所述整流电路和所述升压电路之间的通路，通过所述直流电对所述升压电路进行充电；
    所述升压电路，用于对所述磁感应电路的输出电压进行升压。
  2. 根据权利要求1所述的电路，其特征在于，所述升压电路包括至少一个充放电电路，所述充放电电路与所述开关电路连接；
    所述开关电路，用于导通所述整流电路和所述充放电电路之间的通路，并在所述磁感应电路的输出电压的波形的正半周和负半周分别对所述充放电电路进行充电。
  3. 根据权利要求2所述的电路，其特征在于，所述升压电路包括第一充放电电路和第二充放电电路，所述第一充放电电路和所述第二充放电电路分别与所述整流电路连接，所述开关电路与所述第一充放电电路和所述第二充放电电路之间的公共端连接；
    所述开关电路，用于导通所述整流电路与所述第一充放电电路和所述第二充放电电路之间的通路；并在所述磁感应电路的输出电压的波形的正半周，通过所述直流电对所述第一充放电电路充电，在所述磁感应电路的输出电压的波形的负半周，通过所述直流电对所述第二充放电电路充电。
  4. 根据权利要求3所述的电路，其特征在于，所述第一充放电电路包括至少一个第一电容，所述第二充放电电路包括至少一个第二电容；所述第一电容和所述第二电容分别与所述整流电路连接，所述开关电路与所述第一电容和所述第二电容之间的公共端连接；
    所述开关电路，用于导通所述整流电路与所述至少一个第一电容和所述至少一个第二电容之间的通路；并在所述磁感应电路的输出电压的波形的正半周，通过所述直流电对所述至少一个第一电容充电，在所述磁感应电路的输出电压的波形的负半周，通过所述直流电对所述至少一个第二电容充电。
  5. 根据权利要求1-4中任一项所述的电路，其特征在于，所述开关电路包括驱动电路和至少一个开关管；
    所述驱动电路的输出端与所述开关管的控制端连接，所述开关管还分别与所述整流电路和所述升压电路连接；
    所述驱动电路，用于控制所述开关管的导通状态。
  6. 根据权利要求5所述的电路，其特征在于，所述开关管包括第一开关管；所述第一开关管的控制端与所述驱动电路的输出端连接；所述第一开关管的输入端与所述整流电路连接；所述第一开关管的输出端与所述升压电路连接。
  7. 根据权利要求6所述的电路，其特征在于，所述第一开关管包括P型MOS管和/或N型MOS管。
  8. 根据权利要求5所述的电路，其特征在于，所述开关管包括第二开关管和第三开关管；
    所述驱动电路的输出端分别与所述第二开关管的控制端和所述第三开关管的控制端连接；
    所述第二开关管的输出端与所述第三开关管的输入端连接；所述第二开关管的输入端与 所述整流电路连接；所述第三开关管的输出端与所述升压电路连接。
  9. 根据权利要求8所述的电路，其特征在于，所述第二开关管包括P型MOS管和/或N型MOS管；所述第三开关管包括P型MOS管和/或N型MOS管。
  10. 根据权利要求5所述的电路，其特征在于，所述驱动电路的输入端与所述磁感应电路的输出端连接；
    所述驱动电路，用于通过所述磁感应电路的输出电压导通所述开关管。
  11. 根据权利要求10所述的电路，其特征在于，所述驱动电路包括第一晶体管、第二晶体管、第三电容、第四电容、第五电容、第一负载、第二负载和第一稳压晶体管；
    所述第一晶体管的输入端与所述磁感应电路的第一端连接，所述第一晶体管的输出端与所述第三电容的第一端连接，所述第三电容的第二端与所述磁感应电路的第二端连接；
    所述第四电容的第一端连接与所述磁感应电路的第二端连接，所述第四电容的第二端与所述第二晶体管的输入端连接，所述第二晶体管的输出端与所述磁感应电路的第一端连接；
    所述第三电容的第一端与所述第一负载的第一端连接，所述第一负载的第二端与所述第二负载的第一端连接，所述第二负载的第二端与所述第一稳压晶体管的输入端连接；
    所述第五电容的第一端与所述第一负载、所述第二负载之间的公共端连接，所述第五电容的第二端与所述第四电容的第二端连接；
    所述第四电容的第二端、所述第五电容的第二端、所述第二负载的第二端均接地；
    所述第一稳压晶体管的输出端与所述开关管的控制端连接。
  12. 根据权利要求5所述的电路，其特征在于，所述驱动电路的输入端与所述整流电路的驱动引脚连接；
    所述驱动电路，用于通过所述整流电路的驱动电压导通所述开关管。
  13. 根据权利要求12所述的电路，其特征在于，所述驱动电路包括第二稳压晶体管、第六电容、第七电容、第三负载和第四负载；
    所述第二稳压晶体管的输入端与所述整流电路的驱动引脚连接，所述第二稳压晶体管的输出端分别与所述第六电容的第一端、所述第七电容的第一端连接；所述第六电容的第二端、所述第七电容的第二端均接地；
    所述第二稳压晶体管的输出端还与所述第三负载的第一端连接；所述第三负载的第二端与所述第四负载的第一端连接；所述第四负载的第二端接地；
    所述第三负载与所述第四负载之间的公共端与所述开关管的控制端连接。
  14. 根据权利要求13所述的电路，其特征在于，所述驱动电路还包括偏置单元；所述偏置单元的输出端与所述第二稳压晶体管的输入端连接；
    所述偏置单元，用于对所述第二稳压晶体管的输入电压进行升压，以使所述驱动电路的输出电压进行升压。
  15. 根据权利要求14所述的电路，其特征在于，所述偏置单元包括第三稳压晶体管、第八电容和第五负载；
    所述第五负载的输入端与所述偏置单元的驱动引脚连接，所述第五负载的输出端与所述第三稳压晶体管的输入端连接；所述第八电容的第一端与所述第三稳压晶体管的输入端连接，所述第八电容的第二端接地；
    所述第三稳压晶体管的输出端与所述第二稳压晶体管的输入端连接。
  16. 根据权利要求5所述的电路，其特征在于，所述驱动电路与所述充电电路所在设备的电源电路连接；
    所述驱动电路，用于通过所述电源电路的输出电压导通所述开关管。
  17. 根据权利要求16所述的电路，其特征在于，所述电源电路包括低压差线性稳压器和/或电荷泵。
  18. 一种芯片，其特征在于，所述芯片包括所述权利要求1-17中任一项所述的充电电路。
  19. 一种设备，其特征在于，所述设备包括所述权利要求18中所述的芯片。
  20. 一种设备，其特征在于，所述设备包括所述权利要求1-17中任一项所述的充电电路。
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CN205583799U (zh) * 2016-04-21 2016-09-14 无锡全裕电子科技有限公司 一种充电器的输入电压自适应电路
CN107147199A (zh) * 2017-06-09 2017-09-08 宁波微鹅电子科技有限公司 无线电能接收端和无线充电系统
CN207234532U (zh) * 2017-10-09 2018-04-13 张文涛 一种电动汽车的无线充电系统
CN212305139U (zh) * 2020-07-22 2021-01-05 广东美的制冷设备有限公司 图腾柱功率因数校正电路、驱动装置、压缩机和空调设备
CN113162245A (zh) * 2021-03-23 2021-07-23 Oppo广东移动通信有限公司 充电电路、芯片和设备

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