CN216290708U - Adapter - Google Patents

Abstract

The application relates to the field of charging equipment, in particular to an adapter; the adapter comprises an adapter body and a control circuit board, wherein the adapter body comprises a conductive plugboard and a mounting shell, and the control circuit board is coated in the mounting shell, so that the condition that the control circuit board is damaged by external dust, gravel and the like is reduced; the control circuit board comprises a voltage transformation module, a first charging module and a second charging module; the voltage transformation module transforms an external 220V voltage into a working direct-current voltage of the adapter, and comprises a voltage stabilization module and an output module; the voltage stabilizing module stabilizes the working voltage at a certain value; the output module outputs direct-current voltage to the first charging module and the second charging module; the first charging module and the second charging module can charge external equipment at the same time or can independently charge the external equipment; the application has the function of charging the external equipment.

Description

Adapter

Technical Field

The application relates to the field of charging equipment, in particular to an adapter.

Background

With the popularization of electronic products, the role of a power adapter in life is more and more important; people can not leave the help of the power adapter when charging electronic products such as mobile phones, tablet computers, MP3 and the like.

Because the battery capacity of electronic products often cannot meet the requirements of people, the frequency of using the power adapter by people is high; at the same time, the disadvantages of the power adapter are exposed; the existing power adapter can only supply power to a single product, so that the number of occupied sockets is large.

In view of the above-mentioned related art, the inventor considers that the existing power adapter cannot meet the charging requirement of people.

SUMMERY OF THE UTILITY MODEL

In order to enable a power adapter to simultaneously supply power to a plurality of products, the present application provides an adapter.

The application provides an adapter adopts following technical scheme:

an adapter comprises a module circuit board, wherein the module circuit board comprises a voltage transformation module, a first charging module and a second charging module.

The voltage transformation module is used for converting external alternating current high voltage into direct current low voltage and outputting the direct current low voltage to the first charging module and the second charging module.

The first charging module is used for supplying power to external equipment.

And the second charging module is used for supplying power to external equipment.

The output end of the voltage transformation module is connected with the first charging module and the second charging module respectively.

The first charging module comprises a first charging port, and the second charging module comprises a second charging port.

By adopting the technical scheme, external high-voltage alternating current is input into the voltage transformation module, and the voltage transformation module converts the high-voltage alternating current into low-voltage direct current; the transformation module outputs the low-voltage direct current to the first charging module and the second charging module; owing to be provided with two modules that charge, then can provide charging service to two equipment simultaneously, reach the effect for a plurality of products power supplies simultaneously.

Optionally, the voltage transformation module includes a voltage stabilization module and an output module.

The voltage stabilizing module is used for stabilizing the voltage output to the first charging module and the second charging module.

The output module is used for outputting direct-current voltage to the first charging module and the second charging module.

The voltage stabilizing module is connected with the output module, and the output end of the output module is respectively connected with the first charging module and the second charging module.

By adopting the technical scheme, after the external high-voltage alternating current is output to the voltage transformation module, firstly, the voltage stabilization module converts the high-voltage alternating current into stable pulsating high-voltage direct current; the voltage stabilizing module outputs the high-voltage pulsating direct current to the output module, the output module converts the high-voltage pulsating direct current into low-voltage direct current, and the output module outputs the low-voltage direct current to the first charging module and the second charging module.

Optionally, the pressure stabilizing module includes a regulating unit and a filtering unit; the filtering unit is used for filtering clutter in the circuit, and the adjusting unit is used for adjusting the PWM duty ratio of the direct-current voltage; the filtering unit is connected with the adjusting unit, and the adjusting unit is connected with the output module.

By adopting the technical scheme, the high-voltage alternating current is firstly converted into the high-voltage pulsating direct current, and the filtering unit filters noise waves in the high-voltage pulsating direct current, so that the alternating current property in the high-voltage pulsating direct current is reduced, and the fluctuation amplitude of the high-voltage pulsating direct current is more stable; the filtering unit outputs the high-voltage pulsating direct current to the adjusting unit, the adjusting unit controls the PWM duty ratio of the high-voltage pulsating alternating current output to the output module, and the PWM duty ratio determines the actual voltage output to the output module under the condition that the rated voltage of the high-voltage pulsating alternating current is fixed, so that the effect of controlling the voltage of the low-voltage direct current is achieved.

Optionally, the adjusting unit includes an adjusting control chip and a power switch circuit; the adjusting control chip is used for controlling the on-off of the power switch circuit; the power switch circuit is used for changing the PWM duty ratio of the direct-current voltage; the input end of the adjusting control chip is connected with the filtering unit, the output end of the adjusting control chip is connected with the input end of the power switch circuit, and the output end of the power switch circuit is connected with the output module.

By adopting the technical scheme, the power switch circuit controls the on-off of the power supply loop, the PWM duty ratio of the high-voltage pulsating direct-current voltage changes, and the PWM duty ratio of the high-voltage pulsating direct-current voltage is related to the on-off of the power switch circuit; because the adjusting control chip controls the on-off of the power switch circuit, the effect of controlling the PWM duty ratio of the high-voltage pulsating direct-current voltage is achieved.

Optionally, the first charging module includes a first protocol module, and the second charging module includes a second protocol module.

The first protocol module is used for controlling the voltage output to the first charging port.

The second protocol module is used for controlling the voltage output to the second charging port.

The output module is connected with the first protocol module and the second protocol module, the first protocol module is connected with the first charging port, and the second protocol module is connected with the second charging port.

By adopting the technical scheme, the first charging port supplies power to external equipment, and the second charging port supplies power to the external equipment; the first protocol module supplies power to the first charging port, and the second protocol module supplies power to the second charging port; the output module supplies power to the first protocol module and the second protocol module.

Optionally, the first charging module includes a power distribution module, an output end of the power distribution module is connected to the first protocol module, and an input end of the power distribution module is connected to the second protocol module.

By adopting the technical scheme, when the first charging port and the second charging port sense the access of external equipment at the same time, the second protocol module outputs voltage to the power distribution module, the power distribution module outputs voltage to the first protocol module to trigger the charging signal of the first protocol module, and at the moment, the first charging port and the second charging port supply power to the external equipment at the same time.

Optionally, the first protocol module includes a first protocol configuration pin, and the second protocol module includes a second protocol configuration pin; the first protocol configuration pin is used for detecting a fast charging protocol compatible with the first protocol module, and the second protocol configuration pin is used for detecting a fast charging protocol compatible with the second protocol module; the first configuration pin and the second configuration pin are both grounded.

By adopting the technical scheme, when the external equipment meets the quick charging requirement, the external equipment is connected into the first charging port or the second charging port and then triggers the quick charging protocol; the first configuration pin is used for triggering the fast charging protocol of the first protocol module, and the second configuration pin is used for triggering the fast charging protocol of the second protocol module.

Optionally, the second charging module further includes a compensation unit and a current detection unit, the compensation unit is configured to keep the voltage output by the second charging port stable, and the current detection unit is configured to detect the magnitude of the current output to the second charging port; the compensation unit is connected with the second protocol module in a bidirectional mode, and the input end of the second protocol module is connected with the output end of the current detection unit.

By adopting the technical scheme, when the charging wire is too long, the voltage output to the external equipment battery is reduced, the current detection unit detects the current value of the charging circuit and feeds the current value back to the second protocol module, the second protocol module outputs information to the compensation unit, and the compensation unit controls the second protocol module to increase or decrease the output voltage according to the received information.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the external high-voltage alternating current is input into the voltage transformation module, and the voltage transformation module converts the high-voltage alternating current into low-voltage direct current; the transformation module outputs the low-voltage direct current to the first charging module and the second charging module; due to the fact that the two charging modules are arranged, charging service can be provided for two devices at the same time, and the effect of supplying power for a plurality of products at the same time is achieved;

2. the power switch circuit controls the on-off of the power supply loop, so that the PWM duty ratio of the high-voltage pulsating direct-current voltage changes, and the PWM duty ratio of the high-voltage pulsating direct-current voltage is related to the on-off of the power switch circuit; the effect of controlling the PWM duty ratio of the high-voltage pulsating direct-current voltage is achieved because the adjusting control chip controls the on-off of the power switch circuit;

3. when the first charging port and the second charging port sense the access of external equipment at the same time, the second protocol module outputs voltage to the power distribution module, the power distribution module outputs voltage to the first protocol module to trigger a charging signal of the first protocol module, and at the moment, the first charging port and the second charging port supply power to the external equipment at the same time.

Drawings

Fig. 1 is an exploded view of the overall structure of an embodiment of the present application.

Fig. 2 is a circuit diagram of a transformer module according to an embodiment of the present application.

Fig. 3 is a circuit diagram of a first charging module according to an embodiment of the present disclosure.

Fig. 4 is a circuit diagram of a second charging module according to an embodiment of the present disclosure.

Fig. 5 is a circuit diagram at the output module according to an embodiment of the present application.

Fig. 6 is a circuit diagram of a voltage regulation module according to an embodiment of the present application.

Fig. 7 is an overall structural view of the embodiment of the present application.

Description of reference numerals:

1. a module circuit board; 2. a voltage transformation module; 21. a voltage stabilization module; 22. an output module; 221. a transformer; 222. a voltage output submodule; 223. a synchronous rectification submodule; 224. a synchronous rectification control chip; 23. an adjustment unit; 24. a filtration unit; 25. adjusting the control chip; 26. a power switching circuit; 27. a filtering subunit; 28. a peak absorber subunit; 29. a voltage conversion module; 3. a first charging module; 31. a first charging port; 32. a first protocol module; 33. a power distribution module; 34. a first protocol configuration pin; 35. a first protocol chip; 36. a first voltage output module; 37. a power supply prompting lamp; 4. a second charging module; 41. a second charging port; 42. a second protocol module; 43. a second protocol configuration pin; 44. a compensation unit; 45. a current detection unit; 46. a second protocol chip; 47. a second voltage output module; 5. a first mounting case; 6. a second mounting case; 7. a plug; 8. and (7) mounting a seat.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses an adapter.

Example 1.

Referring to fig. 1, an adapter comprises a first mounting shell 5, a second mounting shell 6 and a module circuit board 1, wherein the first mounting shell 5 and the second mounting shell 6 are matched with each other to coat the module circuit board 1, so that the condition that foreign matters such as external dust and gravel damage the module circuit board 1 is reduced.

The module circuit board 1 comprises a transformation module 2, a first charging module 3 and a second charging module 4.

Referring to fig. 2, the transformer module 2 is configured to convert an external ac high voltage into a dc low voltage and output the dc low voltage to the first charging module 3 and the second charging module 4.

Referring to fig. 3, the first charging module 3 is configured to supply power to an external device.

Referring to fig. 4, the second charging module 4 is configured to supply power to an external device.

The output end of the voltage transformation module 2 is connected with the first charging module 3 and the second charging module 4 respectively.

Referring to fig. 3 and 4, the first charging module 3 includes a first charging port 31, and the second charging module 4 includes a second charging port 41.

Specifically, the first charging port 31 is a Type-a interface, and the second charging port 41 is a Type-C interface.

The external high-voltage alternating current is input into the voltage transformation module 2, and the voltage transformation module 2 converts the high-voltage alternating current into low-voltage direct current; the transformation module 2 outputs the low-voltage direct current to the first charging module 3 and the second charging module 4; owing to be provided with two modules that charge, then can provide charging service to two equipment simultaneously, reach the effect for a plurality of products power supplies simultaneously.

Referring to fig. 2, the voltage transforming module 2 includes a voltage transforming module 29, and the voltage transforming module 29 is configured to transform external high-voltage ac power into high-voltage dc power.

As one embodiment, the voltage converting module 29 includes two rectifier bridges connected in parallel, and the two rectifier bridges convert the high-voltage ac power into the high-voltage dc pulsating circuit.

The parallel connection mode of the two rectifier bridges increases the current value of the circuit, so that higher power can be output under the condition of inconvenient voltage.

Referring to fig. 2, the transforming module 2 further includes a voltage stabilizing module 21 and an output module 22.

The voltage stabilizing module 21 is used to stabilize the voltages output to the first charging module 3 and the second charging module 4.

The output module 22 is used for outputting the dc voltage to the first charging module 3 and the second charging module 4.

Referring to fig. 2 and 5, the voltage stabilization module 21 includes a regulation unit 23 and a filtering unit 24; the filtering unit 24 is used for filtering noise waves in the circuit, and the adjusting unit 23 is used for adjusting the PWM duty ratio of the direct-current voltage; the filter unit 24 is connected to the regulating unit 23, and the regulating unit 23 is connected to the output module 22.

The high-voltage alternating current is firstly converted into the high-voltage pulsating direct current, and the filtering unit 24 filters noise waves in the high-voltage pulsating direct current, so that the alternating current property in the high-voltage pulsating direct current is reduced, and the fluctuation amplitude of the high-voltage pulsating direct current is more stable.

Referring to fig. 2 and 5, in particular, the filtering unit 24 includes a filtering subunit 27 and a spike absorbing subunit 28.

The filtering subunit 27 is used for absorbing clutter of the high-voltage pulsating direct current, reducing the occurrence of the condition that the circuit components are damaged by the clutter, and achieving the effect of protecting the circuit components; the input of the filter subunit 27 is connected to the output of the voltage conversion module 29.

The peak absorption subunit 28 is used for absorbing peak voltage in the circuit, reducing the occurrence of the situation that the peak voltage damages circuit components, and achieving the effect of protecting the circuit components; the input of the peak absorbing unit is connected to the output of the regulating unit 23.

The filtering subunit 27 outputs the high-voltage pulsating direct current to the regulating unit 23, the regulating unit 23 controls the PWM duty ratio of the high-voltage pulsating direct current output to the output module 22, and the PWM duty ratio determines the actual voltage output to the output module 22 under the condition that the rated voltage of the high-voltage pulsating direct current is fixed, so as to achieve the effect of controlling the voltage of the low-voltage direct current.

Specifically, the higher the PWM duty ratio, the closer the actual voltage output to the output module 22 is to the rated voltage value, the larger the actual voltage value is; conversely, the lower the PWM duty cycle, the smaller the actual voltage value.

Referring to fig. 2 and 5, the adjusting unit 23 includes an adjusting control chip 25 and a power switching circuit 26; the adjusting control chip 25 is used for controlling the on-off of the power switch circuit 26; the power switch circuit 26 is used for changing the PWM duty ratio of the direct-current voltage; the input end of the adjusting control chip 25 is connected with the filtering unit 24, the output end of the adjusting control chip 25 is connected with the input end of the power switch circuit 26, and the output end of the power switch circuit 26 is connected with the output module 22.

The power switch circuit 26 controls the on-off of the power supply loop, so that the PWM duty ratio of the high-voltage pulsating direct-current voltage changes, and the PWM duty ratio of the high-voltage pulsating direct-current voltage is related to the on-off of the power switch circuit 26; because the adjusting control chip 25 controls the power switch circuit 26 to be switched on and off, the effect of controlling the PWM duty ratio of the high-voltage pulsating direct-current voltage is achieved.

Referring to fig. 2 and 5, specifically, as an embodiment, the regulation control chip 25 is an NCP1342 chip, and a DRV pin of the NCP1342 chip is connected to the power switch circuit 26.

Referring to fig. 2 and 5, further, the power switch circuit 26 includes a GaN MOS transistor, that is, a GaN MOS transistor, a DRV pin of the NCP1342 chip controls on/off of the GaN MOS transistor, and the longer the GaN MOS transistor is connected in a unit time, the higher the PWM duty ratio of the high-voltage pulsating dc voltage output to the output module 22 is, the larger the actual voltage value of the high-voltage pulsating dc voltage output to the output module 22 is; thereby achieving the effect of changing the PWM duty ratio of the direct current voltage.

When the voltage at the output module 22 is too high, the PWM duty ratio of the high-voltage pulsating dc voltage output to the output module 22 is reduced, and the voltage at the output module 22 is reduced; when the voltage at the output module 22 is too low, the PWM duty ratio of the high-voltage pulsating dc voltage output to the output module 22 is increased, and the voltage at the output module 22 is increased.

The output end of the voltage stabilizing module 21 is connected with the output module 22, and the output end of the output module 22 is respectively connected with the first charging module 3 and the second charging module 4.

Referring to fig. 2 and 6, in particular, the output module 22 includes a transformer 221, a voltage output submodule 222 and a synchronous rectification submodule 223, and an output terminal of the voltage stabilizing module 21 is connected to the transformer 221; the transformer 221 is connected in series with the voltage output submodule 222 and the synchronous rectifier submodule 223, and the voltage output submodule 222 is connected in parallel with the synchronous rectifier submodule 223.

The transformer 221 is configured to convert the high-voltage dc voltage output by the voltage stabilizing module 21 into a low-voltage dc voltage, the voltage output submodule 222 is configured to output the low-voltage dc voltage to the first charging module 3 and the second charging module 4, and the synchronous rectifier submodule 223 is configured to improve the efficiency of converting the voltage of the transformer 221.

Referring to fig. 2 and fig. 6, specifically, the output module 22 further includes a synchronous rectification control chip 224, and as one embodiment, the synchronous rectification control chip 224 is an MP6908A chip; VD and HVC pins of the MP6908A chip are connected with the voltage output submodule 222; the VSS and SLEW pins of the MP6908A chip are connected to the synchronous rectifier sub-module 223.

After the external high-voltage alternating current is output to the voltage transformation module 2, firstly, the voltage stabilization module 21 converts the high-voltage alternating current into stable pulsating high-voltage direct current; the voltage stabilizing module 21 outputs the high-voltage pulsating direct current to the output module 22, the output module 22 converts the high-voltage pulsating direct current into low-voltage direct current, and the output module 22 outputs the low-voltage direct current to the first charging module 3 and the second charging module 4.

Referring to fig. 3 and 4, the first charging module 3 includes a first protocol module 32, and the second charging module 4 includes a second protocol module 42.

The first protocol module 32 is used for controlling the voltage output to the first charging port 31.

The second protocol module 42 is used to control the voltage output to the second charging port 41.

Referring to fig. 3 and 4, the output module 22 is connected to the first protocol module 32 and the second protocol module 42, the first protocol module 32 is connected to the first charging port 31, and the second protocol module 42 is connected to the second charging port 41.

The first charging port 31 supplies power to external equipment, and the second charging port 41 supplies power to external equipment; the first protocol module 32 supplies power to the first charging port 31, and the second protocol module 42 supplies power to the second charging port 41; the output module 22 supplies power to the first protocol module 32 and the second protocol module 42.

Referring to fig. 3 and 4, in particular, the first protocol module 32 includes a first protocol chip 35, and the second protocol module 42 includes a second protocol chip 46.

Referring to fig. 3 and 4, as one embodiment, the first protocol chip 35 is a SW3526 chip, and the second protocol chip 46 is a SW3516 chip.

The SW pin of the first protocol chip 35 outputs a voltage to the first charging port 31, and the SW port of the second protocol chip 46 outputs a voltage to the second charging port 41.

The first charging module 3 further includes a first voltage output module 3622, and the second charging module 4 further includes a second voltage output module 4722.

An input end of the first voltage output module 3622 is connected to the SW pin of the first protocol chip 35, and an output end of the first voltage output module 3622 is connected to the first charging port 31.

An input terminal of the second voltage output block 4722 is connected to the SW pin of the second protocol chip 46, and an output terminal of the second voltage output block 4722 is connected to the second charging port 41.

Referring to fig. 3 and 4, the first protocol chip 35 is provided with a CSP pin and a CSN pin, and the CSP pin and the CSN pin of the first protocol chip 35 are used for detecting a voltage value output to the first charging port 31 by the first voltage output module 3622.

Referring to fig. 3, the first protocol chip 35 is further provided with a BST pin, and the BST pin is connected in series with the first voltage output module 3622.

When the voltage output from the first voltage output module 3622 to the first charging port 31 is too low, the BST pin outputs a voltage to the first voltage output module 3622, which plays a role of increasing the voltage at the first charging port 31.

Referring to fig. 3 and 4, the first charging module 3 includes a power distribution module 33, an input end of the power distribution module 33 is connected to the second protocol module 42, and an output end of the power distribution module 33 is connected to the first protocol module 32.

When the first charging port 31 and the second charging port 41 sense the access of an external device, the second protocol module 42 outputs a voltage to the power distribution module 33, and the power distribution module 33 outputs a voltage to the first protocol module 32 to trigger a charging signal of the first protocol module 32, at this time, the first charging port 31 and the second charging port 41 simultaneously supply power to the external device.

Referring to fig. 3, in particular, the power distribution module 33 includes a power distribution chip, which is SK60E chip as one embodiment.

The first protocol chip 35 includes an EPAD pin, and the second protocol chip 46 includes a VDRV pin; when the first protocol chip 35 supplies power to the first charging port 31, the VDRV pin of the second protocol chip 46 outputs a voltage to the power distribution chip, and the power distribution chip outputs a voltage to the EPAD pin of the first protocol chip 35, so that the first protocol chip 35 receives a signal and the first protocol chip 35 supplies power to the first charging port 31.

Referring to fig. 3, further, the power distribution module 33 further includes a power supply indicator 37, the power supply indicator 37 is a light emitting diode, a cathode of the power supply indicator 37 is connected to the EPAD pin of the first protocol chip 35, and an anode of the power supply indicator 37 is connected to the power distribution chip.

When the power supply prompting lamp 37 is turned on, it indicates that the first protocol chip 35 is supplying power to the first charging port 31.

Referring to fig. 3 and 4, the first protocol module 32 includes a first protocol configuration pin 34, and the second protocol module 42 includes a second protocol configuration pin 43; the first protocol configuration pin 34 is used to detect a fast charging protocol compatible with the first protocol module 32, and the second protocol configuration pin 43 is used to detect a fast charging protocol compatible with the second protocol module 42; the first configuration pin and the second configuration pin are both grounded.

When the external device meets the fast charging requirement, after the external device is accessed into the first charging port 31 or the second charging port 41, the fast charging protocol is triggered; the first configuration pin is used to trigger the fast charging protocol of the first protocol module 32, and the second configuration pin is used to trigger the fast charging protocol of the second protocol module 42.

After the fast charge protocol is triggered, the first protocol module 32 and the second protocol module 42 enter a fast charge mode, the first protocol module 32 increases the output voltage to the first charge port 31, and the second protocol module 42 increases the output voltage to the second charge port 41; the function of accelerating the charging speed is achieved.

Referring to fig. 3 and 4, specifically, the first protocol configuration pin 34 is a CC1 pin of the first protocol chip 35, and the second protocol configuration pin 43 is a CC1 and a CC2 pin of the second protocol chip 46.

Referring to fig. 4, the second charging module 4 further includes a compensation unit 44 and a current detection unit 45, the compensation unit 44 is configured to keep the voltage output by the second charging port 41 stable, and the current detection unit 45 is configured to detect the magnitude of the current output to the second charging port 41; the compensation unit 44 is bidirectionally connected to the second protocol module 42, and an input terminal of the second protocol module 42 is connected to an output terminal of the current detection unit 45.

When the charging line is too long, the voltage output to the external device battery is reduced, the current detection unit 45 detects the current value of the charging circuit and feeds the current value back to the second protocol module 42, the second protocol module 42 outputs information to the compensation unit 44, and the compensation unit 44 controls the second protocol module 42 to increase or decrease the output voltage according to the received information.

Referring to fig. 4, specifically, the current detection unit 45 is connected to the CSPC and CSNC pins of the second protocol chip 46; the compensation unit 44 is connected to the EPAD, COMP pins of the second protocol chip 46.

Referring to fig. 7, the adapter further includes a plug 7 and a mounting seat 8, the plug 7 is mounted on the mounting seat 8, one end of the mounting seat 8 is rotatably disposed on the first mounting shell 5, and the other end of the plug 7 is rotatably disposed on the second mounting shell 6.

When charging is needed, the mounting seat 8 rotates to expose the plug 7, and when charging is not needed, the mounting seat 8 rotates to hide the plug 7.

The implementation principle of the embodiment 1 of the application is as follows: the external high-voltage alternating current is input into the voltage transformation module 2, and the voltage transformation module 2 converts the high-voltage alternating current into low-voltage direct current; the transformation module 2 outputs the low-voltage direct current to the first charging module 3 and the second charging module 4; because be provided with two modules that charge, then can provide charging service to two equipment simultaneously, played the effect of supplying power for a plurality of products simultaneously.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. An adapter comprising a modular circuit board (1), characterized in that: the module circuit board (1) comprises a transformation module (2), a first charging module (3) and a second charging module (4);

the voltage transformation module (2) is used for converting external alternating current high voltage into direct current low voltage and outputting the direct current low voltage to the first charging module (3) and the second charging module (4);

the first charging module (3) is used for supplying power to external equipment;

the second charging module (4) is used for supplying power to external equipment;

the output end of the voltage transformation module (2) is respectively connected with the first charging module (3) and the second charging module (4);

the first charging module (3) comprises a first charging port (31), and the second charging module (4) comprises a second charging port (41).

2. An adapter as claimed in claim 1, wherein: the transformation module (2) comprises a voltage stabilizing module (21) and an output module (22);

the voltage stabilizing module (21) is used for stabilizing the voltage output to the first charging module (3) and the second charging module (4);

the output module (22) is used for outputting direct-current voltage to the first charging module (3) and the second charging module (4);

the voltage stabilizing module (21) is connected with the output module (22), and the output end of the output module (22) is respectively connected with the first charging module (3) and the second charging module (4).

3. An adapter as claimed in claim 2, wherein: the pressure-stabilizing module (21) comprises a regulating unit (23) and a filtering unit (24); the filtering unit (24) is used for filtering noise in the circuit, and the adjusting unit (23) is used for adjusting the PWM duty ratio of the direct-current voltage; the filtering unit (24) is connected with the adjusting unit (23), and the adjusting unit (23) is connected with the output module (22).

4. An adapter as claimed in claim 3, wherein: the adjusting unit (23) comprises an adjusting control chip (25) and a power switch circuit (26); the adjusting control chip (25) is used for controlling the on-off of the power switch circuit (26); the power switch circuit (26) is used for changing the PWM duty ratio of the direct-current voltage; the input end of the adjusting control chip (25) is connected with the filtering unit (24), the output end of the adjusting control chip (25) is connected with the input end of the power switch circuit (26), and the output end of the power switch circuit (26) is connected with the output module (22).

5. An adapter as claimed in claim 1, wherein: the first charging module (3) comprises a first protocol module (32), and the second charging module (4) comprises a second protocol module (42);

the first protocol module (32) is used for controlling the voltage output to the first charging port (31);

the second protocol module (42) is used for controlling the voltage output to the second charging port (41);

the output module (22) is connected with a first protocol module (32) and a second protocol module (42), the first protocol module (32) is connected with a first charging port (31), and the second protocol module (42) is connected with a second charging port (41).

6. An adapter as claimed in claim 5, wherein: the first charging module (3) comprises a power distribution module (33), the output end of the power distribution module (33) is connected with the first protocol module (32), and the input end of the power distribution module (33) is connected with the second protocol module (42).

7. An adapter as claimed in claim 5, wherein: the first protocol module (32) comprises a first protocol configuration pin (34), the second protocol module (42) comprises a second protocol configuration pin (43); the first protocol configuration pin (34) is used for detecting a fast charging protocol compatible with the first protocol module (32), and the second protocol configuration pin (43) is used for detecting a fast charging protocol compatible with the second protocol module (42); the first configuration pin and the second configuration pin are both grounded.

8. An adapter as claimed in claim 5, wherein: the second charging module (4) further comprises a compensation unit (44) and a current detection unit (45), wherein the compensation unit (44) is used for keeping the voltage output by the second charging port (41) stable, and the current detection unit (45) is used for detecting the magnitude of the current output to the second charging port (41); the compensation unit (44) is bidirectionally connected with the second protocol module (42), and the input end of the second protocol module (42) is connected with the output end of the current detection unit (45).

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