CN213693501U

CN213693501U - Power supply circuit and power supply adapter

Info

Publication number: CN213693501U
Application number: CN202022771051.8U
Authority: CN
Inventors: 晏志勇; 边玉龙; 苏小满; 李亚朋
Original assignee: Shenzhen Twowing Technology Co ltd
Current assignee: Shenzhen Twowing Technology Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-07-13
Anticipated expiration: 2030-11-24

Abstract

The application discloses power supply circuit and power adapter, acquire the charging parameter information of the consumer that bluetooth communication link sent through bluetooth control circuit, and according to this charging parameter information output regulation signal to voltage adaptation circuit, so that voltage adaptation circuit converts the commercial power into first direct current voltage and supplies power to the consumer according to regulation signal, the power supply circuit of this application can convert the commercial power into different voltages according to the different voltage demands of consumer and supply power to it, so that the consumer that power supply circuit can the different voltage demands of adaptation, power supply circuit's range of application has been increased.

Description

Power supply circuit and power supply adapter

Technical Field

The application belongs to the technical field of power adapters, and particularly relates to a power circuit and a power adapter.

Background

The quantity and the variety of electronic products on the market are more and more, because different kinds of electronic products have different voltage class requirements for power supply, different kinds of electronic products correspond to a power adapter with one voltage class, the power adapter cannot be commonly used for the electronic products with different voltage class requirements, the quantity of power supply configurators is increased, and the power adapter is abandoned along with the use termination of the electronic products, so that the waste of resources is caused.

SUMMERY OF THE UTILITY MODEL

The present application aims to provide a power supply circuit, which aims to solve the problem that the conventional power supply circuit cannot adapt to electronic products with different voltage level requirements.

A first aspect of an embodiment of the present application provides a power supply circuit, including:

the voltage adaptation circuit is configured to convert commercial power into first direct-current voltage according to the adjusting signal so as to supply power to the electric equipment;

the Bluetooth control circuit is connected with the voltage adapting circuit and is configured to receive charging parameter information of the electric equipment sent by a Bluetooth communication link and output the adjusting signal according to the charging parameter information;

wherein the first direct current voltage is matched with a supply voltage of the electric device.

In one embodiment, the voltage adaptation circuit comprises a switching power supply circuit and a direct current voltage regulation circuit;

the switching power supply circuit is configured to convert the mains power into a second direct-current voltage;

the direct current voltage regulating circuit is respectively connected with the Bluetooth control circuit and the switch power supply circuit and is configured to convert the second direct current voltage into the first direct current voltage according to the regulating signal.

In one embodiment, the switching power supply circuit comprises a rectifying component, a voltage transformation component, a conversion control component and a filtering component;

the rectification component is configured to convert the mains supply into a third direct-current voltage;

the transformation component is connected with the rectification component and configured to convert the third direct-current voltage into a fourth direct-current voltage according to a conversion control signal;

the filter component is connected with the transformation component and is configured to convert the fourth direct current voltage into the second direct current voltage;

the conversion control component is connected with the voltage transformation component, is configured to detect the fourth direct current voltage, and outputs the conversion control signal according to the fourth direct current voltage.

In one embodiment, the rectifying component includes a first voltage dependent resistor, a fuse, a first capacitor, a first resistor, a second resistor, a first common mode choke coil, a first diode, a second diode, a third diode, and a fourth diode;

the first end of the first piezoresistor is connected with the first end of the fusible link and is connected to the mains phase line input end of the rectifying component, the second end of the fusible link, the first end of the first capacitor, the first end of the first resistor and the first end of the first common mode choke coil are connected in common, the second end of the first piezoresistor, the second end of the first capacitor, the first end of the second resistor and the second end of the first common mode choke coil are connected in common and are connected to the mains zero line input end of the rectifying component, the second end of the first resistor and the second end of the second resistor are connected, the third end of the first common mode choke coil, the cathode of the first diode and the anode of the second diode are connected in common, the fourth end of the first common mode choke coil, the cathode of the third diode and the anode of the fourth diode are connected in common, the anode of the first diode and the anode of the third diode are connected to a power ground, and the cathode of the second diode and the cathode of the fourth diode are connected to a third direct-current voltage output end of the rectifying component.

In one embodiment, the voltage transformation component includes a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a ninth diode, a twelfth diode, an eleventh diode, and a transformer;

the filtering component comprises a sixth capacitor, a seventh capacitor, an eighth resistor and a first inductor;

the conversion control component comprises a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fifth diode, a sixth diode, a seventh diode, an eighth diode, an optocoupler, a controllable precision voltage-stabilizing source, a first field effect transistor and a synchronous voltage-reducing chip;

the first end of the second capacitor, the first end of the sixth resistor, the first end of the third resistor, the first end of the fifth resistor, the first end of the primary winding of the transformer and the first end of the fifth capacitor are connected in common and are connected to a third direct-current voltage input end of the voltage transformation component, the second end of the third resistor is connected with the first end of the fourth capacitor, the second end of the fifth resistor, the second end of the fourth capacitor and the cathode of the eleventh diode are connected in common, the second end of the sixth resistor, the cathode of the fifth diode, the first end of the ninth capacitor, the first end of the tenth capacitor, the cathode of the eighth diode and the power supply end of the synchronous buck chip are connected in common, the anode of the fifth diode is connected with the first end of the ninth resistor, the second end of the ninth resistor, the first end of the fifth resistor, the cathode of the fifth resistor and the power supply end of the synchronous buck chip are connected, A cathode of the sixth diode and a first end of the eleventh capacitor are commonly connected, an anode of the sixth diode is connected to the first end of the auxiliary winding of the transformer, an anode of the eleventh diode, a second end of the primary winding of the transformer and a drain of the first field effect transistor are commonly connected, a gate of the first field effect transistor, an anode of the seventh diode, a first end of the sixteenth resistor and a first end of the seventeenth resistor are commonly connected, a cathode of the seventh diode, a first end of the fifteenth resistor and a second end of the sixteenth resistor are commonly connected, a second end of the seventeenth resistor, a first end of the nineteenth resistor, a first end of the twentieth resistor and a source of the first field effect transistor are commonly connected, a second end of the nineteenth resistor is connected to an anode of the eighth diode, a second end of the fifteenth resistor is connected with a gate control end of the synchronous buck chip, a current detection end of the synchronous buck chip is connected with a first end of the fourteenth capacitor, a compensation end of the synchronous buck chip, a first end of the fourteenth resistor and a first end of the thirteenth capacitor are connected in common, a second end of the fourteenth resistor is connected with a collector of the opto-coupler, a voltage feedback end of the synchronous buck chip is connected with a first end of the thirteenth resistor, a first end of a secondary winding of the transformer, an anode of the ninth diode, an anode of the twelfth polar tube and a first end of the third capacitor are connected in common, a cathode of the ninth diode, a cathode of the twelfth polar tube, a first end of the fourth resistor, a first end of the seventh resistor, a first end of the eighth resistor, a first end of the sixth capacitor and a first end of the first inductor are connected in common, the second end of the third capacitor is connected with the second end of the fourth resistor, the second end of the first inductor, the first end of the seventh capacitor and the first end of the eighth capacitor are connected in common and are connected to the second direct-current voltage output end of the filter assembly, the second end of the seventh resistor, the anode of the optocoupler, the first end of the eleventh resistor and the first end of the tenth resistor are connected in common, the cathode of the optocoupler, the second end of the tenth resistor, the first end of the twelfth resistor and the cathode of the controllable precision voltage-stabilizing source are connected in common, the second end of the twelfth resistor is connected with the first end of the twelfth capacitor, the second end of the twelfth capacitor, the control electrode of the controllable precision source, the second end of the eleventh resistor and the first end of the eighteenth resistor are connected in common, the second end of the second capacitor, The second end of the fifth capacitor, the second end of the sixth capacitor, the second end of the seventh capacitor, the second end of the eighth capacitor, the second end of the ninth capacitor, the second end of the tenth capacitor, the second end of the eleventh capacitor, the second end of the thirteenth capacitor, the second end of the fourteenth capacitor, the second end of the eighth resistor, the second end of the thirteenth resistor, the second end of the eighteenth resistor, the second end of the twentieth resistor, the second end of the secondary winding of the transformer, the second end of the auxiliary winding of the transformer, the emitter of the optical coupler, the anode of the controllable precision voltage-stabilizing source and the ground end of the synchronous buck chip are all connected with a power ground. In one embodiment, the dc voltage regulating circuit includes a twenty-second resistor, a twenty-third resistor, a twenty-fifth resistor, a twenty-sixth resistor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a second field effect transistor, a third field effect transistor, a second inductor, a second common mode choke coil, a first light emitting diode, and a twelfth diode;

the first end of twenty-second resistance, the first end of nineteenth electric capacity and the source electrode of second field effect transistor connect and be connected to the second direct voltage input of direct voltage circuit, the first end of twenty-third resistance, the second end of nineteenth electric capacity and the grid of second field effect transistor connect together, the second end of twenty-second resistance, the second end of twenty-third resistance and the collector electrode of third field effect transistor connect together, the base of third field effect transistor with the first end of twenty-fifth resistance is connected and is connected to the regulation signal input of direct voltage regulating circuit, the drain electrode of second field effect transistor, the negative pole of twelfth diode and the first end of second inductance connect together, the second end of second inductance, the first end of seventeenth electric capacity, the first end of eighteenth electric capacity, The first end of the twenty-sixth resistor and the first end of the second common mode choke are connected in common, the second end of the twenty-sixth resistor is connected with the anode of the first light emitting diode, the second end of the second common mode choke and the third end of the second common mode choke are connected to the first direct current voltage output end of the direct current voltage regulating circuit, and the fourth section of the second common mode choke, the cathode of the first light emitting diode, the second end of the seventeenth capacitor, the second end of the eighteenth capacitor, the anode of the twelfth diode, the emitter of the third field effect transistor and the second end of the twenty-fifth resistor are connected with the power ground.

In an embodiment, the second end of the second inductor, the first end of the seventeenth capacitor, the first end of the eighteenth capacitor, the first end of the twenty-sixth resistor, and the first end of the second common mode choke coil are commonly connected to the current feedback end of the dc voltage regulating circuit.

In one embodiment, the bluetooth control circuit comprises a bluetooth control chip, an antenna, a voltage transformation chip, a switch, a fifteenth capacitor, a sixteenth capacitor and a twenty-first resistor;

the bluetooth antenna end of bluetooth control chip with antenna connection, bluetooth control chip's matching key end with the first end of switch is connected, bluetooth control chip's pulse output end is connected to bluetooth control circuit's regulation signal output part, bluetooth control chip's power end, the first end of sixteenth electric capacity and vary voltage chip's voltage output end connects altogether, vary voltage chip's voltage input part, the first end of fifteenth electric capacity and the first end of twenty-first resistance connects altogether, the second end of twenty-first resistance is connected with internal power source.

In one embodiment, the bluetooth control circuit further includes a twenty-fourth resistor, a twenty-sixth resistor, and a second light emitting diode;

the current detection end of the Bluetooth control chip is connected with the first end of the twenty-fourth resistor, the second end of the twenty-fourth resistor is connected to the first direct-current voltage output end of the voltage adapting circuit, the voltage output state display end of the Bluetooth control chip is connected with the first end of the twenty-sixth resistor, the second end of the twenty-sixth resistor is connected with the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is connected with a power ground.

A second aspect of embodiments of the present application provides a power adapter including the power circuit according to any one of the first aspect.

Compared with the prior art, the application has the beneficial effects that: acquire the consumer's that bluetooth communication link sent charging parameter information through bluetooth control circuit, and correspond output regulation signal to voltage adaptation circuit according to this charging parameter information, so that voltage adaptation circuit converts the commercial power into the first direct current voltage that corresponds with consumer and supplies power to consumer according to regulation signal, the power supply circuit of this application can convert the commercial power into different voltages according to consumer's different voltage demands and supply power to it, so that power supply circuit can adapt the consumer of different voltage demands, power supply circuit's range of application has been increased.

Drawings

Fig. 1 is a first exemplary functional block diagram of a power circuit provided in an embodiment of the present application;

fig. 2 is a second exemplary functional block diagram of a power circuit provided by an embodiment of the present application;

fig. 3 is a third exemplary functional block diagram of a power circuit provided in an embodiment of the present application;

fig. 4 is an exemplary circuit schematic diagram of a power circuit provided in an embodiment of the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Fig. 1 shows a first exemplary schematic block diagram of a power supply circuit provided in an embodiment of the present application, and for convenience of description, only the parts related to the embodiment are shown, and detailed as follows:

a power supply circuit includes a voltage adaptation circuit 100 and a Bluetooth control circuit 200.

And the voltage adaptation circuit 100 is configured to convert the commercial power into a first direct-current voltage according to the adjustment signal to supply power to the electric equipment.

And the bluetooth control circuit 200 is connected to the voltage adaptation circuit 100, and is configured to receive charging parameter information of the electric device sent by the bluetooth communication link, and output an adjustment signal according to the charging parameter information.

The first direct current voltage is matched with the power supply voltage of the electric equipment.

In this embodiment, when power needs to be supplied to the electric device, the charging parameter information of the electric device in the bluetooth communication link is acquired through the bluetooth control circuit 200, and an adjustment signal is output to the voltage adaptation circuit 100 correspondingly according to the charging parameter information, so that the voltage adaptation circuit 100 converts the commercial power into the first direct current voltage corresponding to the electric device according to the adjustment signal and supplies power to the electric device, the power circuit of this embodiment can convert the commercial power into different voltages according to different voltage requirements of the electric device to supply power to the electric device, so that the power circuit can adapt to the electric devices with different voltage requirements, and the application range of the power circuit is improved.

The adjusting signal may be a pulse width modulation signal.

The charging parameter information of the electric equipment can be sent to the Bluetooth communication link through the Bluetooth mobile terminal equipment, and the Bluetooth mobile terminal equipment can be the electric equipment and also can be other terminal equipment with a Bluetooth function of non-electric equipment.

In one embodiment, the bluetooth mobile terminal device obtains charging parameter information of the electric equipment by scanning a barcode of the electric equipment, a two-dimensional code of the electric equipment or the electric equipment itself and sends the charging parameter information to the bluetooth communication link.

Referring to fig. 2, in an embodiment, the voltage adaptation circuit 100 includes a switching power supply circuit 110 and a dc voltage regulation circuit 120.

The switching power supply circuit 110 is configured to convert the commercial power into a second direct-current voltage.

The dc voltage regulating circuit 120 is connected to the bluetooth control circuit 200 and the switching power supply circuit 110, respectively, and is configured to convert the second dc voltage into the first dc voltage according to the regulating signal.

In this embodiment, the switching power supply circuit 110 rectifies and reduces the ac mains supply to a second dc voltage, and then the dc voltage regulating circuit 120 converts the second dc voltage into a first dc voltage required by the electric equipment according to the regulating signal, so as to reduce the voltage withstand requirement of the electronic device used by the dc voltage regulating circuit 120, thereby reducing the cost of the dc voltage regulating circuit 120.

Referring to fig. 3, in an embodiment, the switching power circuit 110 includes a rectifying component 111, a transforming component 112, a conversion control component 114, and a filtering component 113.

The rectifying component 111 is configured to convert the mains supply into a third direct voltage.

The transforming component 112 is connected to the rectifying component and configured to transform the third dc voltage into a fourth dc voltage according to the transformation control signal.

The filter component 113 is connected to the transformer component, and is configured to convert the fourth dc voltage into the second dc voltage;

the conversion control component 114 is connected to the voltage transformation component 112, and is configured to detect the fourth dc voltage and output a conversion control signal according to the fourth dc voltage.

In this embodiment, the utility power is converted into a third dc voltage by rectification, the third dc voltage is converted into a fourth dc voltage by the transforming component 112, and the converting control signal is output by the converting control component 114 according to the fourth dc voltage to control the process of converting the third dc voltage into the fourth dc voltage by the transforming component 112, so that the output fourth dc voltage is more stable, and the filtering component 113 filters the fourth dc voltage to output a second dc voltage, so that the quality of the output second dc voltage is higher.

Referring to fig. 4, in an embodiment, the rectifying device 111 includes a first voltage dependent resistor TVR1, a fuse F1, a first capacitor C1, a first resistor R1, a second resistor R2, a first common mode choke LD1, a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4.

A first terminal of the first varistor TVR1 is connected to a first terminal of the fuse F1 and to the mains phase input terminal of the rectifying component 111, a second terminal of the fuse F1, a first terminal of the first capacitor C1, a first terminal of the first resistor R1 and a first terminal of the first common mode choke LD1 are connected in common, a second terminal of the first varistor TVR1, a second terminal of the first capacitor C1, a first terminal of the second resistor R2 and a second terminal of the first common mode choke LD1 are connected in common and to the mains neutral input terminal of the rectifying component 111, a second terminal of the first resistor R1 and a second terminal of the second resistor R2 are connected, a third terminal of the first common mode choke LD1, a cathode of the first diode D1 and an anode of the second diode D2 are connected in common, a fourth terminal of the first diode LD1, a cathode of the third diode D3 and an anode of the fourth diode D4 are connected in common, an anode of the first diode LD1 and an anode of the first common mode choke 3 and a first diode D1, the cathode of the second diode D2 and the cathode of the fourth diode D4 are connected to the third dc voltage output terminal of the rectifying component 111.

Referring to fig. 4, in an embodiment, the transformer assembly 112 includes a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a ninth diode D9, a twelfth diode D10, an eleventh diode D11, and a transformer T1.

The filter module 113 includes a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, an eighth resistor R8, and a first inductor L1.

The conversion control component 114 includes a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, an optical coupler OU, a controllable precision regulator source U4, a first field effect transistor Q1, and a synchronous buck chip U2.

A first end of a second capacitor C2, a first end of a sixth resistor R6, a first end of a third resistor R3, a first end of a fifth resistor R5, a first end of a primary winding of a transformer T1 and a first end of a fifth capacitor C5 are commonly connected and are connected to a third dc voltage input terminal of the transformer assembly 112, a second end of the third resistor R3 is connected to a first end of a fourth capacitor C4, a second end of the fifth resistor R5, a second end of a fourth capacitor C4 and a cathode of an eleventh diode D11 are commonly connected, a second end of the sixth resistor R6, a cathode of a fifth diode D5, a first end of a ninth capacitor C9, a first end of a tenth capacitor C10, a cathode of an eighth diode D8 and a power supply terminal of a synchronous buck chip U2 are commonly connected, an anode of the fifth diode D5 is connected to a first end of the ninth resistor R9, a second end of the ninth resistor R5, a cathode of the sixth resistor R6 and a cathode of the eleventh capacitor C57323 are commonly connected to a VDD, the anode of the sixth diode D6 is connected to the first end of the auxiliary winding of the transformer T1, the anode of the eleventh diode D11, the second end of the primary winding of the transformer T1 and the drain of the first fet Q1 are connected in common, the GATE of the first fet Q1, the anode of the seventh diode D7, the first end of the sixteenth resistor R16 and the first end of the seventeenth resistor R17 are connected in common, the cathode of the seventh diode D7, the first end of the fifteenth resistor R15 and the second end of the sixteenth resistor R16 are connected in common, the second end of the seventeenth resistor R17, the first end of the nineteenth resistor R19, the first end of the twentieth resistor R20 and the source of the first fet Q1 are connected in common, the second end of the nineteenth resistor R19 is connected to the anode of the eighth diode D8, the second end of the fifteenth resistor R15 is connected to the GATE control terminal GATE of the synchronous buck chip U5, and the fourteenth terminal of the synchronous buck circuit 14 is connected to the fourteenth terminal of the buck capacitor 57324C 14, a compensation terminal CMOP of the synchronous buck chip U2, a first terminal of a fourteenth resistor R14 and a first terminal of a thirteenth capacitor C13 are connected in common, a second terminal of a fourteenth resistor R14 is connected with a collector of the optical coupler OU, a voltage feedback terminal burst of the synchronous buck chip U2 is connected with a first terminal of a thirteenth resistor R13, a first terminal of a secondary winding of the transformer T1, an anode of a ninth diode D9, an anode of a twelfth diode D10 and a first terminal of a third capacitor C3 are connected in common, a cathode of a ninth diode D9, a cathode of a twelfth diode D10, a first terminal of a fourth resistor R4, a first terminal of a seventh resistor R7, a first terminal of an eighth resistor R8, a first terminal of a sixth capacitor C6 and a first terminal of a first inductor L1 are connected in common, a second terminal of a third capacitor C3 is connected with a second terminal of the fourth resistor R4, a first terminal of the first inductor L5, a second terminal of the seventh inductor L7 and a second terminal of the eighth capacitor assembly 573112 are connected in common, the second end of a seventh resistor R7, the anode of the optical coupler OU, the first end of an eleventh resistor R11 and the first end of a tenth resistor R10 are connected in common, the cathode of the optical coupler OU, the second end of a tenth resistor R10, the first end of a twelfth resistor R12 and the cathode of a controllable precise voltage stabilization source U4 are connected in common, the second end of a twelfth resistor R12 is connected with the first end of a twelfth capacitor C12, the second end of a twelfth capacitor C12, the control pole of the controllable precise voltage stabilization source U4, the second end of an eleventh resistor R11 and the first end of an eighteenth resistor R18 are connected in common, the second end of a second capacitor C2, the second end of a fifth capacitor C5, the second end of a sixth capacitor C6, the second end of a seventh capacitor C7, the second end of an eighth capacitor C8, the second end of a ninth capacitor C9, the second end of a tenth capacitor C10, the second end of an eleventh capacitor C5, the second end of a thirteenth capacitor C13, the second end of a fourteenth capacitor C57324, the fourteenth capacitor C3524 and the second end of the twelfth, The second end of the eighth resistor R8, the second end of the thirteenth resistor R13, the second end of the eighteenth resistor R18, the second end of the twentieth resistor R20, the second end of the secondary winding of the transformer T1, the second end of the auxiliary winding of the transformer T1, the emitter of the optical coupler OU, the anode of the controllable precise voltage-stabilizing source U4 and the ground end GND of the synchronous buck chip U2 are all connected with the power ground.

A first end of the first inductor L1 is connected to a fourth dc voltage input end of the filter module 113, a cathode of the ninth diode D9 is connected to a fourth dc voltage output end of the transformer module 112, an anode of the optocoupler OU is connected to a fourth dc voltage detection end of the conversion control module 114, and a drain of the first field-effect transistor Q1 is connected to a conversion control signal output end of the conversion control module 114.

Referring to fig. 4, in an embodiment, the dc voltage regulating circuit 120 includes a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a second fet Q2, a third fet Q3, a second inductor L2, a second common mode choke LD2, a first light emitting diode DL1, and a twelfth diode D12.

A first end of a twenty-second resistor R22, a first end of a nineteenth capacitor C19 and a source of a second field effect transistor Q2 are connected in common and to a second DC voltage input terminal of the DC voltage circuit, a first end of a twenty-third resistor R23, a second end of a nineteenth capacitor C19 and a gate of a second field effect transistor Q2 are connected in common, a second end of a twenty-second resistor R22, a second end of a twenty-third resistor R23 and a collector of the third field effect transistor Q3 are connected in common, a base of a third field effect transistor Q3 and a first end of a twenty-fifth resistor R25 are connected and to a regulation signal input terminal of the DC voltage regulation circuit 120, a drain of the second field effect transistor Q2, a cathode of a twelfth diode D12 and a first end of a second inductor L2 are connected in common, a second end of the second inductor L2, a first end of a seventeenth capacitor C17, a first end of an eighteenth capacitor C18, a first end of a twenty-sixth resistor and a common mode choke of a second inductor LD2 are connected in common, a second end of the twenty-sixth resistor R26 is connected to the anode of the first light emitting diode DL1, a second end of the second common mode choke LD2 and a third end of the second common mode choke LD2 are connected to the first dc voltage output end of the dc voltage regulating circuit 120, and the fourth segment of the second common mode choke LD2, the cathode of the first light emitting diode DL1, the second end of the seventeenth capacitor C17, the second end of the eighteenth capacitor C18, the anode of the twelfth diode D12, the emitter of the third fet Q3, and the second end of the twenty-fifth resistor R25 are connected to the power ground.

Referring to fig. 4, in an embodiment, the second terminal of the second inductor L2, the first terminal of the seventeenth capacitor C17, the first terminal of the eighteenth capacitor C18, the first terminal of the twenty-sixth resistor, and the first terminal of the second common mode choke LD2 are commonly connected to the current feedback terminal of the dc voltage regulating circuit 120.

Referring to fig. 4, in an embodiment, the bluetooth control circuit 200 includes a bluetooth control chip U3, an antenna, a transformer chip U1, a switch SW1, a fifteenth capacitor C15, a sixteenth capacitor C16, and a twenty-first resistor R21.

The bluetooth antenna end BT of bluetooth control chip U3 is connected with the antenna, the matching KEY end KEY of bluetooth control chip U3 is connected with the first end of switch SW1, the pulse output end PWM of bluetooth control chip U3 is connected to the adjustment signal output end of bluetooth control circuit 200, bluetooth control chip U3's power end VCC, the first end of sixteenth electric capacity C16 and the voltage output end VOUT of vary voltage chip U1 connect together, the voltage input end VIN of vary voltage chip U1, the first end of fifteenth electric capacity C15 and the first end of twenty-first resistance R21 connect together, the second end of twenty-first resistance R21 is connected with internal power source.

Referring to fig. 4, in an embodiment, the bluetooth control circuit 200 further includes a twenty-fourth resistor R24, a twenty-sixth resistor R26, and a second light emitting diode DL 2.

The current detection end PA1 of the Bluetooth control chip U3 is connected with the first end of a twenty-fourth resistor R24, the second end of the twenty-fourth resistor R24 is connected with the first direct-current voltage output end of the voltage adaptation circuit 100, the voltage output state display end PA2 of the Bluetooth control chip U3 is connected with the first end of a twenty-sixth resistor R26, the second end of the twenty-sixth resistor R26 is connected with the anode of a second light emitting diode DL2, and the cathode of the second light emitting diode DL2 is connected with the power ground.

The power supply circuit shown in fig. 4 is described with reference to the working principle, a bridge-type rectifying circuit formed by the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 rectifies the mains supply into a third dc voltage, when the first fet Q1 is in a conducting state and the third dc voltage is in a positive half cycle change, the primary winding of the transformer T1 converts the electric energy into the secondary winding of the transformer T1, when the first fet Q1 is in a conducting state and the third dc voltage is in a negative half cycle change, the secondary winding of the transformer T1 converts the electric energy into the secondary winding of the transformer T1 through the secondary winding of the transformer T1, the secondary winding of the transformer T1 converts the transformed third dc voltage into a second dc voltage through the energy storage of the first inductor L1, the second dc voltage controls the conducting degree of the controllable precision voltage-stabilizing source U4 to control the positive pole of the third dc voltage and the negative pole of the optical coupler OU, thereby controlling the conduction degree of the optical coupler OU and feeding back to the compensation end CMOP of the synchronous voltage reduction chip U2, controlling the duty ratio of the signal of the first field effect tube Q1 according to the GATE control end GATE of the synchronous voltage reduction chip U2 of the conduction degree of the optical coupler OU, thereby controlling the conversion of the first transformer T1 to the third direct current voltage, enabling the output second direct current voltage to be more stable, converting the second direct current voltage to the voltage suitable for the work of the Bluetooth control chip U3 through the twenty-first resistor R21 and the voltage transformation chip U1 in sequence, when the antenna end of the Bluetooth control chip U3 obtains the charging parameter information of the electric equipment from the Bluetooth communication link through the antenna, outputting a pulse width modulation signal (adjustment signal) corresponding to the duty ratio to the base of the third field effect tube Q3 according to the charging parameter information through the pulse output end PWM of the Bluetooth control chip U3, when the adjustment signal is in a positive pulse (at this time, the voltage value of the adjustment signal is greater than the base driving voltage of the base of the third field effect tube The effect transistor Q3 is turned on, the gate of the second field effect transistor Q2 is grounded through the third field effect transistor Q3, the second field effect transistor Q2 is turned on, the second dc voltage is output to the second inductor L2 through the second field effect transistor Q2, the second inductor L2 stores energy in the second dc voltage, the third field effect transistor Q3 is turned off when the adjustment signal is in a negative pulse, the second field effect transistor Q2 is turned off, the second inductor L2 converts the stored energy into the first dc voltage and applies the first dc voltage to the electric equipment through the second common mode choke LD2 and the twelfth diode D12, when the second inductor L2 outputs the second dc voltage, the current of the bluetooth control chip U3 detects a current signal, and the voltage output state display terminal PA2 of the bluetooth control chip U3 outputs a high level to control the lighting of the second light emitting diode DL2, so as to indicate that the current power supply circuit is supplying power to the electric equipment.

The embodiment of the present application further provides a power adapter, which includes the power circuit according to any of the above embodiments, because the power adapter of the present embodiment includes the power circuit according to any of the above embodiments, the power adapter of the present embodiment at least has the corresponding advantages of the power circuit according to any of the above embodiments.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A power supply circuit, comprising:

2. The power supply circuit of claim 1, wherein the voltage adaptation circuit comprises a switching power supply circuit and a dc voltage regulator circuit;

3. The power supply circuit according to claim 2, wherein the switching power supply circuit includes a rectifying component, a transforming component, a conversion control component, and a filtering component;

4. The power supply circuit of claim 3, wherein the rectifying component comprises a first voltage dependent resistor, a fuse, a first capacitor, a first resistor, a second resistor, a first common mode choke, a first diode, a second diode, a third diode, and a fourth diode;

5. The power supply circuit of claim 3, wherein the voltage transformation component comprises a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a ninth diode, a twelfth diode, an eleventh diode, and a transformer;

the first end of the second capacitor, the first end of the sixth resistor, the first end of the third resistor, the first end of the fifth resistor, the first end of the primary winding of the transformer and the first end of the fifth capacitor are connected in common and are connected to a third direct-current voltage input end of the voltage transformation component, the second end of the third resistor is connected with the first end of the fourth capacitor, the second end of the fifth resistor, the second end of the fourth capacitor and the cathode of the eleventh diode are connected in common, the second end of the sixth resistor, the cathode of the fifth diode, the first end of the ninth capacitor, the first end of the tenth capacitor, the cathode of the eighth diode and the power supply end of the synchronous buck chip are connected in common, the anode of the fifth diode is connected with the first end of the ninth resistor, the second end of the ninth resistor, the first end of the fifth resistor, the cathode of the fifth resistor and the power supply end of the synchronous buck chip are connected, A cathode of the sixth diode and a first end of the eleventh capacitor are commonly connected, an anode of the sixth diode is connected to the first end of the auxiliary winding of the transformer, an anode of the eleventh diode, a second end of the primary winding of the transformer and a drain of the first field effect transistor are commonly connected, a gate of the first field effect transistor, an anode of the seventh diode, a first end of the sixteenth resistor and a first end of the seventeenth resistor are commonly connected, a cathode of the seventh diode, a first end of the fifteenth resistor and a second end of the sixteenth resistor are commonly connected, a second end of the seventeenth resistor, a first end of the nineteenth resistor, a first end of the twentieth resistor and a source of the first field effect transistor are commonly connected, a second end of the nineteenth resistor is connected to an anode of the eighth diode, a second end of the fifteenth resistor is connected with a gate control end of the synchronous buck chip, a current detection end of the synchronous buck chip is connected with a first end of the fourteenth capacitor, a compensation end of the synchronous buck chip, a first end of the fourteenth resistor and a first end of the thirteenth capacitor are connected in common, a second end of the fourteenth resistor is connected with a collector of the opto-coupler, a voltage feedback end of the synchronous buck chip is connected with a first end of the thirteenth resistor, a first end of a secondary winding of the transformer, an anode of the ninth diode, an anode of the twelfth polar tube and a first end of the third capacitor are connected in common, a cathode of the ninth diode, a cathode of the twelfth polar tube, a first end of the fourth resistor, a first end of the seventh resistor, a first end of the eighth resistor, a first end of the sixth capacitor and a first end of the first inductor are connected in common, the second end of the third capacitor is connected with the second end of the fourth resistor, the second end of the first inductor, the first end of the seventh capacitor and the first end of the eighth capacitor are connected in common and are connected to the second direct-current voltage output end of the filter assembly, the second end of the seventh resistor, the anode of the optocoupler, the first end of the eleventh resistor and the first end of the tenth resistor are connected in common, the cathode of the optocoupler, the second end of the tenth resistor, the first end of the twelfth resistor and the cathode of the controllable precision voltage-stabilizing source are connected in common, the second end of the twelfth resistor is connected with the first end of the twelfth capacitor, the second end of the twelfth capacitor, the control electrode of the controllable precision source, the second end of the eleventh resistor and the first end of the eighteenth resistor are connected in common, the second end of the second capacitor, The second end of the fifth capacitor, the second end of the sixth capacitor, the second end of the seventh capacitor, the second end of the eighth capacitor, the second end of the ninth capacitor, the second end of the tenth capacitor, the second end of the eleventh capacitor, the second end of the thirteenth capacitor, the second end of the fourteenth capacitor, the second end of the eighth resistor, the second end of the thirteenth resistor, the second end of the eighteenth resistor, the second end of the twentieth resistor, the second end of the secondary winding of the transformer, the second end of the auxiliary winding of the transformer, the emitter of the optical coupler, the anode of the controllable precision voltage-stabilizing source and the ground end of the synchronous buck chip are all connected with a power ground.

6. The power supply circuit of claim 2, wherein the dc voltage regulation circuit comprises a twenty-second resistor, a twenty-third resistor, a twenty-fifth resistor, a twenty-sixth resistor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a second fet, a third fet, a second inductor, a second common mode choke, a first light emitting diode, and a twelfth diode;

7. The power supply circuit of claim 6, wherein the second terminal of the second inductor, the first terminal of the seventeenth capacitor, the first terminal of the eighteenth capacitor, the first terminal of the twenty-sixth resistor, and the first terminal of the second common mode choke are commonly connected to the current feedback terminal of the DC voltage regulator circuit.

8. The power supply circuit of claim 1, wherein the bluetooth control circuit comprises a bluetooth control chip, an antenna, a transformer chip, a switch, a fifteenth capacitor, a sixteenth capacitor, and a twenty-first resistor;

9. The power circuit of claim 8, wherein the bluetooth control circuit further comprises a twenty-fourth resistor, a twenty-sixth resistor, and a second light emitting diode;

10. A power adapter comprising a power circuit as claimed in any one of claims 1 to 9.