CN116349109A - Charging circuit and electronic equipment - Google Patents
Charging circuit and electronic equipment Download PDFInfo
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- CN116349109A CN116349109A CN202180070706.3A CN202180070706A CN116349109A CN 116349109 A CN116349109 A CN 116349109A CN 202180070706 A CN202180070706 A CN 202180070706A CN 116349109 A CN116349109 A CN 116349109A
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
Abstract
The application provides a charging circuit and electronic equipment. The charging circuit comprises a charging interface, a control module and a protocol identification circuit. The charging interface is used for being connected with a charger. The control module is used for responding to the charging interface to connect the charger and outputting control signals according to a preset output mode. The protocol identification circuit is used for receiving the control signal and outputting an induction signal according to the control signal, wherein the induction signal can be transmitted to the charger through the charging interface so as to induce the charger to transmit charging voltage to the charging interface according to a target charging protocol. The charging circuit provided by the application adopts a simple protocol identification circuit to replace a protocol IC chip, can induce corresponding charging voltage from a charger according to a target charging protocol, and has the advantages of simple structure, low cost and wide application range.
Description
The application relates to the field of charging technology, in particular to a charging circuit and electronic equipment.
The QC fast charge technology is the QuickCharge technology, and is a fast charge technology dominated by high pass. The battery quick charge problem under the different environment of hardware is mainly solved. Taking the high-pass QC2.0 as an example, a higher charging voltage needs to be introduced without changing the interface to further increase the charging speed. The high-pass device designs a handshake protocol for realizing mutual identification of the charger and the electronic equipment by changing the voltages of the D+ and the D-pins of the USB interface, and the charger outputs corresponding voltages (such as 5V, 9V, 12V or 20V) according to voltage signals output by the electronic equipment through the D+ and the D-pins so as to rapidly charge the electronic equipment.
Currently, electronic devices supporting QC quick charging technology on the market generally use a protocol IC chip (Integrated Circuit Chip) to communicate with a charger in QC protocol, however, the price of the protocol IC is high.
Disclosure of Invention
A first aspect of the present application provides a charging circuit comprising a charging interface, a control module, and a protocol identification circuit. The charging interface is used for being connected with a charger. The control module is used for responding to the charging interface to connect the charger and outputting control signals according to a preset output mode. The protocol identification circuit is used for receiving the control signal and outputting an induction signal according to the control signal, wherein the induction signal can be transmitted to the charger through the charging interface so as to induce the charger to transmit charging voltage to the charging interface according to a target charging protocol.
A second aspect of the present application provides an electronic device, the electronic device comprising an energy storage component and a charging circuit according to the first aspect, the energy storage component being connected to the charging circuit, the charging circuit being configured to receive an external power source and to charge the energy storage component.
The charging circuit provided by the application adopts the simple protocol identification circuit to replace the protocol IC chip, can induce corresponding charging voltage from the charger according to the target charging protocol, and has the advantages of simple structure, low cost and wide application range.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a functional module of a charging circuit according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a functional module of another charging circuit according to an embodiment of the present application.
Fig. 3 is a schematic circuit diagram of a charging interface and a charging control module of the charging circuit shown in fig. 2.
Fig. 4 is a schematic circuit diagram of a voltage detection module of the charging circuit shown in fig. 2.
Fig. 5 is a circuit diagram of a protocol identification circuit of the charging circuit shown in fig. 2.
Fig. 6 is a circuit configuration diagram of another protocol identification circuit of the charging circuit shown in fig. 2.
Fig. 7 is a circuit configuration diagram of a control module of the charging circuit shown in fig. 2.
Fig. 8 is a schematic diagram of a functional module of an electronic device according to an embodiment of the present application.
Description of the main reference signs
A first signal output end D+
Second signal output terminal D-
Voltage dividing circuit 306, 307
A third input terminal 313
Resistors R1, R2, R7, R12, R14, R15, R16, R17, R18,
R19、R21、R22
Unidirectional conductive elements D2, D4
Switching units Q2, Q3, Q5, Q22
Ground point GND, SGND
Micro control module U2
USB interface J1
The following detailed description will further illustrate the application in conjunction with the above-described figures.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Wherein the drawings are for illustrative purposes only and are shown as schematic representations and are not to be construed as limiting the present application. It will be apparent that the described embodiments are merely some, but not all, examples of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
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. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 1, an embodiment of a charging circuit 100 is provided, where the charging circuit 100 includes a charging interface 10, a control module 40, and a protocol identification circuit 30.
In the embodiment of the present application, the charging interface 10 is used to connect with the charger 200. Wherein the charging interface 10 may comprise a USB interface.
It should be noted that "connection" in the present application includes a physical line connection form and/or a wireless connection form for implementing electric power transmission between components.
In this embodiment, the control module 40 is configured to output a control signal according to a preset output mode in response to the charging interface 10 accessing the charger 200. In an embodiment of the present application, the preset output mode includes a voltage value of at least one control signal and an output duration of the at least one control signal.
In this embodiment, the protocol identification circuit 30 is configured to receive the control signal and output an induction signal according to the control signal, where the induction signal can be transmitted to the charger 200 through the charging interface 10, so as to induce the charger 200 to transmit a charging voltage to the charging interface 10 according to a target charging protocol.
In the embodiment of the present application, the protocol identification circuit 30 is connected to the charging interface 10 and the control module 40 respectively. The protocol identification circuit 30 comprises a semiconductor element and/or a resistor, wherein the semiconductor element comprises a transistor and/or a unidirectional conducting element.
The control signals include a first set of control signals and a second set of control signals, and the induction signals include a first set of induction signals and a second set of induction signals. The outputting the control signal according to the preset output mode specifically includes: and continuously outputting the first group of control signals. And stopping outputting the first group of control signals and continuously outputting the second group of control signals when the continuous output time of the first group of control signals is larger than a preset time threshold.
The protocol recognition circuit 30 outputs the first set of induction signals according to the first set of control signals, and the protocol recognition circuit 30 outputs the second set of induction signals according to the second set of control signals, wherein the first set of induction signals and the second set of induction signals are used for inducing the charger 200 to deliver charging voltage to the charging interface 10 according to a target charging protocol. Illustratively, the target charging protocol includes a high-pass QC2.0 protocol, and the induction signal is capable of inducing the charger 200 to output a charging voltage of 5V, 9V, or 12V.
The charging circuit 100 provided by the application adopts the simple protocol identification circuit 30 to replace a protocol IC chip, can induce corresponding charging voltage from a charger according to a target charging protocol, and has the advantages of simple structure, low cost and wide application range.
Referring to fig. 2, another charging circuit 100' is provided in an embodiment of the present application. As shown in fig. 2, in the embodiment of the present application, the charging circuit 100' further includes a voltage detection module 20 respectively connected to the control module 40 and the charging interface 10, where the voltage detection module 20 is configured to detect an input voltage of the charging interface 10, determine that the charging interface 10 is connected to the charger 200 according to the input voltage, and output a trigger signal to the control module 40. The control module 40 is configured to output the control signal in response to the trigger signal, so that the protocol identification circuit 30 outputs the induction signal according to the control signal.
For example, referring to fig. 3-4 together, the charging interface 10 includes a USB interface J1, and the USB interface J1 includes a first voltage pin v+, a second voltage pin V-, a first signal pin (d+ pin), and a second signal pin (D-pin). The voltage detection module 20 includes a resistor R14, a resistor R16, and a switching unit Q22. One end of the resistor R14 is connected to the first voltage pin v+ and is configured to receive the input voltage VIN of the USB interface J1, and the other end of the resistor R14 is connected to the control end of the switching unit Q22. One end of the resistor R16 is connected to the control end of the switching unit Q22, and the other end of the resistor R16 is connected to the ground point SGND. A first connection end of the switch unit Q22 is connected to the control module 40, and a second connection end of the switch unit Q22 is connected to the ground point SGND. When the charger 200 is connected to the USB interface J1, the charger 200 outputs a voltage VIN to the first voltage pin v+ of the USB interface J1, for example, the voltage VIN has a voltage value of 5V, and the voltage VIN makes the switch unit Q22 be turned on, so that the voltage detection module 20 outputs the trigger signal vin_int to the control module 40. In the embodiment of the present application, the trigger signal vin_int is a low level signal.
In this embodiment, the charging circuit 100' further includes a charging control circuit 50 connected to the USB interface J1, where the charging control circuit 50 is used to connect to the energy storage component 300. During charging, the charger 200 charges the energy storage component 300 through the USB interface J1 and the charging control circuit 50. The charging control circuit 50 feeds back a charging current signal cha_i_scan to the control module 40 in real time, and the control module 40 is further configured to adjust a duty ratio of a PWM signal output to the charging control circuit 50 according to the charging current signal cha_i_scan, so as to implement constant current charging of the energy storage component 300 by the charger 200, for example, 2A constant current charging, with a charging power of 18W. Illustratively, the energy storage assembly 300 may include, but is not limited to, a lithium battery, a super capacitor.
In some embodiments, the protocol identification circuit 30 includes one or more control signal inputs and one or more signal outputs, wherein the voltage value of the control signal received by one of the control signal inputs affects at least the voltage value of the induced signal output by one of the signal outputs.
In some embodiments, the protocol identification circuit 30 includes two identification sub-modules, each of which is connected to at least one of the control signal input terminals and one of the signal output terminals, and each of which is configured to output an induction signal of a corresponding voltage value at the signal output terminal to which it is connected, according to the voltage value of the control signal received by the control signal input terminal to which it is connected.
Referring to fig. 5, an embodiment of the present application provides a circuit structure of a protocol identification circuit 30. As shown in fig. 5, in the embodiment of the present application, the signal output end includes a first signal output end d+ and a second signal output end D-, where the first signal output end d+ is connected to the d+ pin of the USB interface J1, and the second signal output end D-is connected to the D-pin of the USB interface J1. The protocol recognition circuit 30 comprises a first recognition sub-module 31 and a second recognition sub-module 32, and the control signal input of the protocol recognition circuit 30 comprises a first input 311, a second input 312 and a third input 313. Specifically, the first recognition sub-module 31 connects the first input terminal 311 and the first signal output terminal d+, and the second recognition sub-module 32 connects the second input terminal 312, the third input terminal 313, and the second signal output terminal D-.
In the present embodiment, each set of control signals includes a first control signal qc_en1, a second control signal qc_en2, and a third control signal qc_en3.
Specifically, the protocol identification circuit 30 further includes a voltage input terminal 305, a first voltage dividing circuit 306, a second voltage dividing circuit 307, a first switching unit Q3, a second switching unit Q2, and a third switching unit Q5.
The voltage input terminal 305 is connected to a voltage source for receiving a stabilized voltage VCC. The first voltage dividing circuit 306 is connected between the voltage input terminal 305 and the ground GND, and the first voltage dividing circuit 306 includes a first voltage dividing node 301 connected to the first signal output terminal d+. The first connection end of the first switch unit Q3 is connected to the first signal output end d+ through a resistor R18, the second connection end of the first switch unit Q3 is connected to the ground GND, and the control end of the first switch unit Q3 is connected to the first input end 311 and is configured to receive the first control signal qc_en1. The first voltage dividing circuit 306 includes a resistor R2 and a resistor R7, the resistor R2 is connected between the voltage input terminal 305 and the first signal output terminal d+, and the resistor R7 is connected between the first signal output terminal d+ and the ground GND.
The second voltage dividing circuit 307 is connected between the voltage input terminal 305 and the ground GND, and the second voltage dividing circuit 307 includes a second voltage dividing node 302 connected to the second signal output terminal D-.
The second switching unit Q2 is connected between the voltage input terminal 305 and the second voltage dividing circuit 307, and a control terminal of the second switching unit Q2 is connected to the second input terminal 312 and is configured to receive the second control signal qc_en2. The control terminal of the second switching unit Q2 is also connected to the voltage input terminal 305 via a resistor R1.
The third switching unit Q5 is connected between the second voltage dividing circuit 307 and the ground GND, and a control terminal of the third switching unit Q5 is connected to the third input terminal 313 and is configured to receive the third control signal qc_en3. The second voltage dividing circuit 307 includes a resistor R12 and a resistor R19, where the resistor R12 is connected between the second switching unit Q2 and the second signal output terminal D-, and the resistor R19 is connected between the second signal output terminal D-and the third switching unit Q5.
In this embodiment of the present application, the first switching unit Q3 and the third switching unit Q5 are high-level conductive switching units, and the second switching unit Q2 is a low-level conductive switching unit. Illustratively, the switching unit includes a transistor.
When the control circuit works, the first control signal QC_EN1 and the second control signal QC_EN2 in the first group of control signals are high-level signals, and the third control signal QC_EN3 is a low-level signal. When the protocol identification circuit 30 receives the first set of control signals, the first switch unit Q3 is turned on, the first signal output end d+ outputs a first signal with a voltage value within a first threshold range, the second switch unit Q2 and the third switch unit Q5 are both turned off, and the second signal output end D-is suspended, where the first set of induced signals is the first signal with a voltage value within the first threshold range. In this embodiment of the present application, when the duration output time of the first set of control signals is greater than 1.25s, the output of the first set of control signals is stopped, and the second set of control signals is continuously output, where the first threshold range is 0.325V-2.0V.
The first control signal qc_en1 and the second control signal qc_en2 in the second set of control signals are both low level signals, and the third control signal qc_en3 is a high level signal. When the protocol identification circuit 30 receives the second set of control signals, the first switch unit Q3 is turned off, the first signal output end d+ outputs a first signal with a voltage value within a second threshold range, the second switch unit Q2 is turned on with the third switch unit Q5, and the second signal output end D-outputs a second signal with a voltage value within the first threshold range, where the second set of induction signals is composed of the first signal with a voltage value within the second threshold range and the second signal with a voltage value within the first threshold range. In this embodiment, the second threshold range is 2.0V-5.0V, and the protocol identification circuit 30 outputs the second set of induction signals after the duration of outputting the first set of induction signals to the charger 200 exceeds 1.25s, so that the charger 200 can be induced to output a charging voltage of 9V according to the QC protocol.
Referring to fig. 6, another circuit configuration of the protocol identification circuit 30' is also provided in the embodiments of the present application. As shown in fig. 6, the control signal input terminal of the protocol identification circuit 30' includes a fourth input terminal 314 and a fifth input terminal 315.
In the present embodiment, each set of control signals includes a fourth control signal qc_en4 and a fifth control signal qc_en5. The fourth input terminal 314 is configured to receive the fourth control signal qc_en4, and the fifth input terminal 315 is configured to receive the fifth control signal qc_en5.
Specifically, the protocol identification circuit 30' further includes a resistor R15, a resistor R17, a resistor R21, a resistor R22, a unidirectional conductive element D2, and a unidirectional conductive element D4. The resistor R15 is connected between the fifth input terminal 315 and the first signal output terminal d+. The resistor R17 is connected between the first signal output terminal d+ and the first ground GND. The anode of the unidirectional conduction device D4 is connected to the fourth input terminal 314, and the cathode of the unidirectional conduction device D4 is connected to the first signal output terminal d+. The resistor R21 and the first unidirectional conductive element D4 are connected in parallel between the fourth input terminal 314 and the first signal output terminal d+. The anode of the unidirectional conduction element D2 is connected with the second signal output end D-, and the cathode of the unidirectional conduction element D2 is connected with the grounding point GND. Resistor R22 is connected between the second signal output D-and the fourth input 314. Preferably, the unidirectional conducting element comprises a diode.
When the protocol identification circuit 30' receives the first set of control signals, the first signal output end d+ outputs a first signal with a voltage value within a first threshold range, the second signal output end D-outputs a second signal with a voltage value smaller than a voltage threshold, and the first set of induction signals consists of the first signal with the voltage value within the first threshold range and the second signal with the voltage value smaller than the voltage threshold. In this embodiment of the present application, when the duration of output of the first set of control signals is greater than 1.25s, output of the first set of control signals is stopped, and output of the second set of control signals is continued, where the first threshold range is 0.325V-2.0V, the voltage threshold is 0.325V, the voltage value of the high level signal is 5V, and the voltage value of the low level signal is 0V.
The fourth control signal qc_en4 and the fifth control signal qc_en5 in the second set of control signals are high level signals, when the protocol identification circuit 30' receives the second set of control signals, the first signal output end d+ outputs a first signal with a voltage value within a second threshold range, the second signal output end D-outputs a second signal with a voltage value within the first threshold range, and the second set of induced signals is composed of the first signal with a voltage value within the second threshold range and the second signal with a voltage value within the first threshold range. In the embodiment of the present application, the second threshold value ranges from 2.0V to 5.0V. In this embodiment, the protocol identification circuit 30' outputs the second set of induction signals after the duration of outputting the first set of induction signals to the charger 200 exceeds 1.25s, so as to induce the charger 200 to output a charging voltage of 9V according to the QC protocol.
Referring to fig. 7, fig. 7 is a schematic circuit diagram of the control module 40 according to an embodiment of the present application. The control module 40 includes a micro control module U2, where the micro control module U2 may include a plurality of input/output ports, and the control module 40 may communicate and exchange information with other functional modules or external devices through the plurality of input/output ports, so as to implement functions such as connection, driving, and control of the charging circuit 100'.
Illustratively, the power supply port VDD/AVDD of the micro control module U2 is used for receiving the stabilized voltage VCC provided by the voltage stabilizing module 60, the output port PC5/SEG13 is used for outputting the first control signal qc_en1 to the protocol recognition circuit 30, the output port PC4/SEG12 is used for outputting the second control signal qc_en2 to the protocol recognition circuit 30, the output port PC3/SWG11 is used for outputting the third control signal qc_en3 to the protocol recognition circuit 30, and the input port PA0/INT2/TCKO/ICPCK is used for receiving the trigger signal vin_int outputted by the voltage detecting module 20.
In this embodiment, the charging circuit 100 'further includes a voltage stabilizing module 60 connected to the charging interface 10 and/or the energy storage component 300, where the voltage stabilizing module 60 is configured to receive an input voltage of the energy storage component 300 and/or the charging interface 10, and perform voltage conversion on the input voltage to output a stable voltage VCC, for example, a direct current voltage of 5V, so as to provide a stable power supply voltage to each functional module of the charging circuit 100', for example, provide a stable voltage VCC to the voltage source, and provide a stable voltage VCC to the control module 40. The voltage regulator module 60 may employ a DC-DC converter or a linear regulator, such as a low dropout linear regulator (low dropout regulator, LDO).
Referring to fig. 8, an embodiment of the present application further provides an electronic device 600, where the electronic device 600 includes the energy storage component 300 and the charging circuit 100 or the charging circuit 100' as described above, and the energy storage component 300 is connected to the charging circuit, and the charging circuit is configured to receive an external power source and charge the energy storage component 300. Illustratively, the charging circuit is connected to a charger 200, through which the charger 200 charges the energy storage assembly 300. Illustratively, the electronic device may include, but is not limited to, a cell phone, a tablet computer, and the like.
According to the electronic equipment, the charging circuit is used, the simple protocol identification circuit 30 is adopted to replace a protocol IC chip, corresponding charging voltage can be induced from the charger according to a target charging protocol, and the electronic equipment is simple in structure and low in cost.
Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or equivalent replaced without departing from the spirit and scope of the technical solution of the present application.
Claims (15)
- A charging circuit, comprising:the charging interface is used for being connected with a charger;the control module is used for responding to the charging interface to access the charger and outputting a control signal according to a preset output mode;the protocol identification circuit is used for receiving the control signal and outputting an induction signal according to the control signal, wherein the induction signal can be transmitted to the charger through the charging interface so as to induce the charger to transmit charging voltage to the charging interface according to a target charging protocol.
- The charging circuit of claim 1, wherein the protocol identification circuit comprises a semiconductor element and/or a resistor, wherein the semiconductor element comprises a transistor and/or a unidirectional conducting element.
- The charging circuit of claim 1, wherein the preset output pattern comprises a voltage value of at least one control signal and an output duration of the at least one control signal.
- The charging circuit of claim 1, wherein the protocol identification circuit comprises one or more control signal inputs and one or more signal outputs, wherein a voltage value of a control signal received by one of the control signal inputs affects at least a voltage value of an induced signal output by one of the signal outputs.
- The charging circuit of claim 4, wherein the protocol identification circuit comprises two identification sub-modules, each identification sub-module being connected to at least one of the control signal inputs and one of the signal outputs, and each identification sub-module being configured to output an induced signal of a corresponding voltage value at the signal output to which it is connected, based on a voltage value of a control signal received at the control signal input to which it is connected.
- The charging circuit of claim 1, wherein the protocol identification circuit is coupled to the charging interface and the control module, respectively.
- The charging circuit of claim 4, wherein the charging interface comprises a first signal pin and a second signal pin, the signal output comprising a first signal output and a second signal output, wherein the first signal output is connected to the first signal pin and the second signal output is connected to the second signal pin.
- The charging circuit of claim 7, wherein the target charging protocol comprises QC protocol, the first signal pin being a d+ pin and the second signal pin being a D-pin.
- The charging circuit of claim 7 or 8, wherein the control signals comprise a first set of control signals and a second set of control signals, and the induction signals comprise a first set of induction signals and a second set of induction signals;the outputting the control signal according to the preset output mode specifically includes:continuously outputting the first set of control signals;stopping outputting the first group of control signals and continuously outputting the second group of control signals when the continuous output time of the first group of control signals is larger than a preset time threshold value;the protocol identification circuit outputs the first group of induction signals according to the first group of control signals, and the protocol identification circuit outputs the second group of induction signals according to the second group of control signals, wherein the first group of induction signals and the second group of induction signals are used for inducing the charger to convey charging voltage to the charging interface according to a target charging protocol.
- The charging circuit of claim 9, wherein the control signal input of the protocol identification circuit comprises a first input, a second input, and a third input;each set of control signals includes a first control signal, a second control signal, and a third control signal;the protocol identification circuit further includes:the voltage input end is connected with a voltage source;the first voltage dividing circuit is connected between the voltage input end and a first grounding point and comprises a first voltage dividing node connected with the first signal output end;the first connecting end of the first switch unit is connected with the first signal output end through a resistor, and the second connecting end of the first switch unit is connected with the first grounding point; the control end of the first switch unit is connected with the first input end and is used for receiving the first control signal;the second voltage dividing circuit is connected between the voltage input end and the first grounding point and comprises a second voltage dividing node connected with the second signal output end;the second switch unit is connected between the voltage input end and the second voltage dividing circuit, and the control end of the second switch unit is connected with the second input end and is used for receiving the second control signal; andand the control end of the third switch unit is connected with the third input end and is used for receiving the third control signal.
- The charging circuit of claim 10, wherein the first switching unit and the third switching unit employ high-level turn-on switching units, and the second switching unit employs low-level turn-on switching units;the first control signal and the second control signal in the first group of control signals are high-level signals, and the third control signal is a low-level signal; when the protocol identification circuit receives the first group of control signals, the first switch unit is turned on, the first signal output end outputs a first signal with a voltage value within a first threshold range, the second switch unit and the third switch unit are both turned off, and the second signal output end is suspended, wherein the first group of induction signals are the first signals with the voltage value within the first threshold range;the first control signal and the second control signal in the second group of control signals are low-level signals, and the third control signal is a high-level signal; when the protocol identification circuit receives the second group of control signals, the first switch unit is turned off, the first signal output end outputs a first signal with a voltage value within a second threshold range, the second switch unit is turned on with the third switch unit, and the second signal output end outputs a second signal with the voltage value within the first threshold range, wherein the second group of induction signals consist of the first signal with the voltage value within the second threshold range and the second signal with the voltage value within the first threshold range.
- The charging circuit of claim 9, wherein the control signal input of the protocol identification circuit comprises a fourth input, a fifth input;each set of control signals includes a fourth control signal and a fifth control signal;the fourth input end is used for receiving the fourth control signal, and the fifth input end is used for receiving the fifth control signal;the protocol identification circuit further includes:the first resistor is connected between the fifth input end and the first signal output end;the second resistor is connected between the first signal output end and the first grounding point;the anode of the first unidirectional conduction element is connected with the fourth input end, and the cathode of the first unidirectional conduction element is connected with the first signal output end;a third resistor connected in parallel with the first unidirectional conductive element between the fourth input terminal and the first signal output terminal;the anode of the second unidirectional conduction element is connected with the second signal output end, and the cathode of the second unidirectional conduction element is connected with the first grounding point; andand the fourth resistor is connected between the second signal output end and the fourth input end.
- The charging circuit of claim 12, wherein a fourth control signal of the first set of control signals is a low level signal and a fifth control signal is a high level signal, the first signal output terminal outputs a first signal having a voltage value within a first threshold range, the second signal output terminal outputs a second signal having a voltage value less than a voltage threshold value, and the first set of induced signals is composed of the first signal having a voltage value within the first threshold range and the second signal having a voltage value less than the voltage threshold value when the protocol identification circuit receives the first set of control signals;the fourth control signal and the fifth control signal in the second set of control signals are high-level signals, when the protocol identification circuit receives the second set of control signals, the first signal output end outputs a first signal with a voltage value within a second threshold value range, the second signal output end outputs a second signal with a voltage value within the first threshold value range, and the second set of induction signals consist of the first signal with a voltage value within the second threshold value range and the second signal with a voltage value within the first threshold value range.
- The charging circuit of claim 1, further comprising a voltage detection module respectively connected to the control module and the charging interface, wherein the voltage detection module is configured to detect an input voltage of the charging interface, and to determine that the charging interface is connected to the charger according to the input voltage, and output a trigger signal to the control module; the control module is used for responding to the trigger signal and outputting the control signal so that the protocol identification circuit outputs the induction signal according to the control signal.
- An electronic device, comprising:an energy storage assembly; andthe charging circuit of any one of claims 1-14, the energy storage assembly being coupled to the charging circuit, the charging circuit being configured to receive an external power source and to charge the energy storage assembly.
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|---|---|---|---|
| PCT/CN2021/111114 WO2023010506A1 (en) | 2021-08-06 | 2021-08-06 | Charging circuit and electronic device |
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| CN116349109A true CN116349109A (en) | 2023-06-27 |
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|---|---|---|---|---|
| TWI495226B (en) * | 2012-11-30 | 2015-08-01 | Hon Hai Prec Ind Co Ltd | Charger and electronic device |
| CN207441007U (en) * | 2017-07-06 | 2018-06-01 | 苏州本控电子科技有限公司 | A kind of pendent lamp intelligent charge voice remote controller |
| CN109193888B (en) * | 2018-10-23 | 2024-04-02 | 珠海一微半导体股份有限公司 | Wireless charging power supply system with Type-c interface and charging method |
| CN210608648U (en) * | 2019-05-23 | 2020-05-22 | 苏州蓝沛无线通信科技有限公司 | External wireless charging receiving device |
-
2021
- 2021-08-06 WO PCT/CN2021/111114 patent/WO2023010506A1/en unknown
- 2021-08-06 CN CN202180070706.3A patent/CN116349109A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023010506A1 (en) | 2023-02-09 |
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