CN212231148U

CN212231148U - Novel gallium nitride charger

Info

Publication number: CN212231148U
Application number: CN202020868236.8U
Authority: CN
Inventors: 何世友
Original assignee: Shenzhen Beihang Technology Co ltd
Current assignee: Shenzhen Baseus Technology Co Ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-12-25
Anticipated expiration: 2030-05-21

Abstract

The utility model provides a novel gallium nitride charger, include: the power supply comprises an access port, a first rectifying circuit, a PFC circuit, an LLC circuit, a second rectifying circuit and a DC-DC conversion circuit; the PFC circuit comprises a PFC boost loop and a PFC main control IC; a first gallium nitride switch is arranged in the PFC boost loop; the PFC master control IC is connected with the first gallium nitride switch; the access port is connected with the first rectifying circuit, the first rectifying circuit is connected with the PFC boost loop, the PFC boost loop is connected with the LLC circuit, the LLC circuit is connected with the second rectifying circuit, and the second rectifying circuit is connected with the DC-DC conversion circuit so as to output power through the output port of the DC-DC conversion circuit. Through setting up PFC circuit and LLC circuit in charging circuit, through the gallium nitride switch that wherein adopts, based on the characteristic of gallium nitride switch high frequency switch, when improving charging power and charging speed, can also effectively reduce the volume of whole charger, compromise power and volume, realized better charging experience.

Description

Novel gallium nitride charger

Technical Field

The utility model relates to a charging device field, in particular to novel gallium nitride charger.

Background

With the development of technology, electronic products such as mobile phones, tablets, notebook computers and the like are more and more widely applied in life. The use of electronic products is accompanied with the consumption of electric energy, and most of the electronic products in the prior art use rechargeable batteries as power sources, and need to be charged periodically to ensure that the electronic products can be used normally.

In the prior art, a charger is used for charging electronic products, but the conventional charger or the conventional charger with a large volume is similar to a brick block in size, large in volume and large in mass, so that the portability is poor; or the charging power is very small, for example, a 5W (charging voltage 5V, current 1A) charger used in an apple charger for a long time, due to the limitation of the power, the capacity of the present rechargeable battery is increasing, which results in a very long charging time, generally several hours, which seriously affects the normal use of the electronic product.

In summary, the prior art cannot well realize the simultaneous quick charging of multiple chargers, so the prior art needs to be improved.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a novel gallium nitride charger, through PFC circuit and the LLC circuit of setting in charging circuit, through the gallium nitride switch that wherein adopts, based on the characteristic of gallium nitride switch high frequency switch, when improving charging power and charging speed, can also effectively reduce the volume of whole charger, compromise power and volume, realized better charging experience.

Specifically, the utility model provides a following specific embodiment:

the embodiment of the utility model provides a novel gallium nitride charger, include: the power supply control circuit comprises an access port, a first rectification circuit, a PFC circuit, an LLC circuit, a second rectification circuit and a DC-DC conversion circuit, wherein the access port, the first rectification circuit, the PFC circuit, the LLC circuit, the second rectification circuit and the DC-DC conversion circuit are connected with an external power supply; the PFC circuit comprises a PFC boost loop and a PFC main control IC; a first gallium nitride switch is arranged in the PFC boost loop; the PFC master control IC is connected with the first gallium nitride switch so as to control the PFC boost loop and provide a PWM (pulse width modulation) switching signal for the first gallium nitride switch; the access port is connected with the first rectifying circuit, the first rectifying circuit is connected with the PFC boost loop, the PFC boost loop is connected with the LLC circuit, the LLC circuit is connected with the second rectifying circuit, and the second rectifying circuit is connected with the DC-DC conversion circuit so as to output power through an output port of the DC-DC conversion circuit.

In a specific embodiment, the PFC boost loop further comprises: the circuit comprises a first inductor, a second inductor, a third inductor, a first diode, a first capacitor and a protection diode; the first rectifying circuit is connected with the first inductor; the first inductor is connected with the second inductor, the second inductor is connected with the third inductor, the third inductor is connected with the anode of the first diode, and the cathode of the first diode is connected with the first end of the first capacitor; a first end of the first capacitor is connected with the LLC circuit, and a second end of the first capacitor is grounded; one end of the protection diode is respectively connected with the first inductor and the second inductor, and the other end of the protection diode is respectively connected with the first diode and the first capacitor; one end of the gallium nitride switch is connected with the first inductor and the second inductor respectively, and the other end of the gallium nitride switch is connected with the second inductor and the third inductor respectively.

In a specific embodiment, the first gallium nitride switch is provided with a PWM interface, and the first gallium nitride switch is connected to the PFC main control IC through the PWM interface.

In a specific embodiment, the LLC circuit includes an LLC main control IC, a second gallium nitride switch, and a third gallium nitride switch; the second gallium nitride switch and the third gallium nitride switch are both provided with PWM interfaces, the LLC main control IC is provided with two PWM contacts, and the LLC main control IC is connected with the PWM interface on the second gallium nitride switch through one PWM contact and is connected with the PWM interface on the third gallium nitride switch through the other PWM contact.

In a specific embodiment, the LLC circuit further includes: a fourth inductor, a fifth inductor, a second capacitor, a third capacitor, a second diode and a transformer;

the PFC boost loop is connected with the fourth inductor; the fourth inductor is connected with a second gallium nitride switch, the second gallium nitride switch is connected with the fifth inductor, the fifth inductor is connected with the third gallium nitride switch, the second gallium nitride switch is connected with the second capacitor, the second gallium nitride switch is connected with one end of a primary coil of the transformer, the third gallium nitride switch is respectively connected with the third capacitor and the anode of the second diode, the cathodes of the third capacitor and the second diode are both connected with the other end of the primary coil of the transformer, and a secondary coil of the transformer is connected with the second rectifying circuit.

In a specific embodiment, the output port comprises any combination of a plurality of: Type-C interface, USB interface, Lighting interface.

In a specific embodiment, the system further comprises a controller for performing power distribution;

the number of the DC-DC conversion circuits is multiple, and each DC-DC conversion circuit is provided with one output port; each DC-DC conversion circuit is connected with the controller so as to distribute the output power of each DC-DC conversion circuit under the control of the controller.

In a specific embodiment, the method further comprises the following steps: a housing: the access port, the first rectifying circuit, the PFC circuit, the LLC circuit, the second rectifying circuit and the DC-DC conversion circuit are respectively arranged in the shell;

in a specific embodiment, the heat dissipation device further comprises a heat dissipation lining, wherein the heat dissipation lining is arranged on the inner wall of the outer shell; the heat dissipation lining is provided with a grounding wire.

In a specific embodiment, the method further comprises the following steps: an EMI suppression module; wherein the access port is connected to the first rectifying circuit through the EMI suppression module.

Therefore, the embodiment of the utility model provides a novel gallium nitride charger is proposed, include: the power supply control circuit comprises an access port, a first rectification circuit, a PFC circuit, an LLC circuit, a second rectification circuit and a DC-DC conversion circuit, wherein the access port, the first rectification circuit, the PFC circuit, the LLC circuit, the second rectification circuit and the DC-DC conversion circuit are connected with an external power supply; the PFC circuit comprises a PFC boost loop and a PFC main control IC; a first gallium nitride switch is arranged in the PFC boost loop; the PFC master control IC is connected with the first gallium nitride switch so as to control the PFC boost loop and provide a PWM (pulse width modulation) switching signal for the first gallium nitride switch; the access port is connected with the first rectifying circuit, the first rectifying circuit is connected with the PFC boost loop, the PFC boost loop is connected with the LLC circuit, the LLC circuit is connected with the second rectifying circuit, and the second rectifying circuit is connected with the DC-DC conversion circuit so as to output power through an output port of the DC-DC conversion circuit. Through setting up PFC circuit and LLC circuit in charging circuit, through the gallium nitride switch that wherein adopts, based on the characteristic of gallium nitride switch high frequency switch, when improving charging power and charging speed, can also effectively reduce the volume of whole charger, compromise power and volume, realized better charging experience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a novel gallium nitride charger according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a partial circuit structure of a novel gallium nitride charger according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of an FRC circuit in a novel gallium nitride charger according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an FRC master IC in a novel gallium nitride charger according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an LLC circuit in a novel gallium nitride charger according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an LLC main control IC in a novel gallium nitride charger according to an embodiment of the present invention;

fig. 7 is a schematic circuit diagram of a DC-DC conversion circuit and an output port in a novel gallium nitride charger according to an embodiment of the present invention;

fig. 8 is a schematic circuit diagram of a DC-DC conversion circuit and an output port in a novel gallium nitride charger according to an embodiment of the present invention;

fig. 9 is a schematic circuit diagram of a controller of an output port of a DC-DC conversion circuit in a novel gallium nitride charger according to an embodiment of the present invention;

fig. 10 is a schematic view of a novel gan charger according to an embodiment of the present invention;

fig. 11 is a schematic view of a novel gallium nitride charger according to an embodiment of the present invention;

fig. 12 is a schematic view illustrating a disassembly explosion of a novel gallium nitride charger according to an embodiment of the present invention.

Illustration of the drawings:

100-a charger circuit board;

1-an access port; 2-a first rectifying circuit;

3-a PFC circuit; 31-a PFC boost loop; 32-PFC master control IC;

4-LLC circuit; 5-a second rectifying circuit; 5-a second rectifying circuit; a 6-DC-DC conversion circuit; 7-an EMI suppression module;

101-outer shell, 102-heat dissipation lining.

Detailed Description

Various embodiments of the present disclosure will be described more fully hereinafter. The present disclosure is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the various embodiments of the disclosure to the specific embodiments disclosed herein, but rather, the disclosure is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure.

The terminology used in the various embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present disclosure belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined in various embodiments of the present disclosure.

Examples

The embodiment of the utility model discloses novel gallium nitride charger, as shown in fig. 1-2, include: the power supply control circuit comprises an access port 1 connected with an external power supply, a first rectification circuit 2, a PFC circuit 3, an LLC circuit 4, a second rectification circuit 5 and a DC-DC conversion circuit 6; wherein the PFC circuit 3 comprises a PFC boost loop 31 (shown in fig. 3) and a PFC master IC32 (shown in fig. 4); a first gallium nitride switch (e.g., a switch K1 of U5 in fig. 3, for example, a chip with model number NV6127 may be selected) is disposed in the PFC boost loop circuit 31; the PFC main control IC32 is connected to the first gallium nitride switch to control the PFC boost loop 31 and provide a PWM switching signal for the first gallium nitride switch; the access port is connected with the first rectifying circuit 2, the first rectifying circuit 2 is connected with the PFC boost loop 31, the PFC boost loop 31 is connected with the LLC circuit 4, the LLC circuit 4 is connected with the second rectifying circuit 5, and the second rectifying circuit 5 is connected with the DC-DC conversion circuit 6 so as to output power through an output port of the DC-DC conversion circuit 6.

In this scheme, the charger circuit board 100 carries an access port 1, a first rectifying circuit 2 (as shown in fig. 2, or other rectifying modules for realizing ac to DC), a PFC circuit 3, an LLC circuit 4, a second rectifying circuit 5 (as shown in fig. 2, or other rectifying modules for realizing ac to DC), and a DC-DC conversion circuit 6, and by using the high-frequency switching characteristic of the first gallium nitride switch, the charging speed can be increased, and the charging power higher than that of the charger with ordinary power at present can be realized, specifically, for example, the high-power charging of 45W or 120W can be realized, and based on the characteristic of the high-frequency small volume and the high-power charging effect can be achieved.

Specifically, the access port 1 is connected with a mains supply, for example, the ac-to-dc conversion is realized through the first rectification circuit 2, the input voltage is raised through the PFC circuit 3 to improve the power factor, the transmission loss is reduced, and the high-voltage dc after the boost of the PFC is converted into the low-voltage ac based on the LLC circuit 4 in the following process. The alternating current converted by the LLC circuit 4 passes through the second rectifying circuit 5 to obtain a direct current for the subsequent DC-DC conversion circuit 6, and the direct current obtained by the DC-DC conversion circuit 6 after being rectified by the previous stage can meet the power requirements of different power combinations of three output ports, such as Type-C1, Type-C2, and USBA, required by the complete machine, such as maximum output power of 120W, and one power combination can be: Type-C1+ Type-C2+ USBA 60W +30W + 30W.

As shown in fig. 2 and 3, the PFC boost loop circuit 31 further includes: a first inductor (e.g., L1 in fig. 3), a second inductor (e.g., L9 in fig. 3), a third inductor (e.g., the combination of L4 and L5 in fig. 3), a first diode (e.g., D16 in fig. 3), a first capacitor (e.g., the combination of CA4-C4 in fig. 3), a protection diode (e.g., D9 in fig. 3); the first rectifying circuit 2 is connected with the first inductor; the first inductor is connected with the second inductor, the second inductor is connected with the third inductor, the third inductor is connected with the anode of the first diode, and the cathode of the first diode is connected with the first end of the first capacitor; the first end of the first capacitor is connected with the LLC circuit 4, and the second end of the first capacitor is grounded; one end of the protection diode is respectively connected with the first inductor and the second inductor, and the other end of the protection diode is respectively connected with the first diode and the first capacitor; one end of the gallium nitride switch is connected with the first inductor and the second inductor respectively, and the other end of the gallium nitride switch is connected with the second inductor and the third inductor respectively.

Specifically, in the PFC boost loop 31, a first inductor (e.g., L1 in fig. 3), a second inductor (e.g., L9 in fig. 3), a third inductor (e.g., a combination of L4 and L5 in fig. 3), a first diode (e.g., D16 in fig. 3), a first capacitor (e.g., a combination of CA4-C4 in fig. 3), and a first gallium nitride switch form a loop, the PFC main control IC32 is configured to control the whole PFC loop to operate and provide PWM switching, and the protection diode (e.g., D9 in fig. 3) is a protection diode of the PFC circuit 3, so as to prevent the first gallium nitride switch from being damaged by magnetic saturation overcurrent and the like caused by instantaneous flowing through the PFC inductor during startup.

In a specific embodiment, as shown in fig. 3 and 4, the first gallium nitride switch is provided with a PWM interface, and the first gallium nitride switch is connected to the PFC main control IC32 through the PWM interface.

Therefore, the high-frequency switch of the gallium nitride switch is driven under the control of the control signal of the PFC main control IC32, so that the subsequent LLC circuit 4 can perform charging and discharging operations based on the switching frequency of the gallium nitride switch.

In a specific embodiment, as shown in fig. 5 and fig. 6, the LLC circuit 4 includes an LLC master IC (shown in fig. 6), a second gallium nitride switch (e.g., Q3 shown in fig. 5 may be, for example, NV6115), and a third gallium nitride switch (e.g., Q4 shown in fig. 6 may be, for example, a chip of NV6115 DE); the second gallium nitride switch and the third gallium nitride switch are both provided with PWM interfaces, the LLC main control IC is provided with two PWM contacts, and the LLC main control IC is connected with the PWM interface on the second gallium nitride switch through one PWM contact and is connected with the PWM interface on the third gallium nitride switch through the other PWM contact.

Specifically, the LLC circuit 4 includes two gallium nitride switches, and the two gallium nitride switches convert high-voltage dc boosted by the PFC into low-voltage ac under the control of the LLC main control IC based on the settings of their own inductors, capacitors, and transformers, so as to be subsequently applied to a high-frequency, high-power-density power supply product to be charged in the charger.

In a specific embodiment, the LLC circuit 4 further includes: a fourth inductor (e.g., L8 in fig. 6), a fifth inductor (e.g., L7 in fig. 6), a second capacitor (e.g., the parallel combination of C70-C72 in fig. 6), a third capacitor (e.g., L3 in fig. 6), a second diode (e.g., D8 in fig. 6), a transformer (e.g., T1 in fig. 6);

the PFC boost loop circuit 31 is connected with the fourth inductor; the fourth inductor is connected to a second gallium nitride switch, the second gallium nitride switch is connected to the fifth inductor, the fifth inductor is connected to the third gallium nitride switch, the second gallium nitride switch is connected to the second capacitor, the second gallium nitride switch (for example, fig. 6, specifically, port 9 connected to the fifth inductor) is connected to one end of the primary coil of the transformer, the third gallium nitride switch (for example, fig. 6, specifically, port 9) is connected to the third capacitor and the anode of the second diode, the cathodes of the third capacitor and the second diode are both connected to the other end of the primary coil of the transformer, and the secondary coil of the transformer is connected to the second rectifying circuit 5.

The number of the DC-DC conversion circuits is multiple, and each DC-DC conversion circuit is provided with one output port; the Type-C interface and the USB interface are taken as examples for explanation, and as shown in fig. 7, the DC-DC conversion circuit 6 corresponds to the Type-C interface, while fig. 7 corresponds to the DC-DC conversion circuit 6 of the USB interface; in the actual application process, a double Type-C interface combination of a Type-C interface and a Type-C interface can be selected, other combinations such as a combination of a Type-C interface and a USB interface can be selected, and the specific output port can be selected according to the actual situation; for example, in one embodiment, the specific output port may be a single Type-C interface, a single USB interface, or a single Lighting interface, and certainly, in order to better match the charging requirement in the real environment, a combination of two output ports, a combination of three output ports, and a combination of a greater number of output ports may also be selected, and the specific output port is not limited to these specifically listed interfaces, and interfaces of other specifications may also be adopted as long as the power supply can be output.

In a specific embodiment, the system further comprises a controller for performing power distribution; each DC-DC conversion circuit is connected with the controller so as to distribute the output power of each DC-DC conversion circuit under the control of the controller. The specific controller may be an MCU (i.e., a single chip microcomputer), specifically, taking two interfaces as an example, the MCU in fig. 9 is connected to a VDRV pin labeled 14 of U1 (for example, a chip with model No. QFN28_4X4_ EPAD SW 3516H) in the DC-DC module in fig. 7 through a VDRV port; meanwhile, the MCU is connected to a VDRV1 pin labeled 14 of a U3 (for example, a chip with a model of QFN28_4X4_ EPAD SW 3516H) in the DC-DC module in fig. 8 through a VDRV1 port, so as to control the two, for example, when the number of output ports is 2 (or 3 or other numbers), the output ports of the two independent DC-DC conversion circuits 6 may output simultaneously, and the output may be dynamically allocated by controlling and adjusting the output power through the MCU.

In a specific embodiment, as shown in fig. 10-12, further comprising: the casing 101: the access port 1, the first rectification circuit 2, the PFC circuit 3, the LLC circuit 4, the second rectification circuit 5 and the DC-DC conversion circuit 6 are respectively arranged in the shell 101;

in order to ensure the long-term normal and stable charging, the scheme can also be provided with a heat dissipation lining 102, wherein the heat dissipation lining 102 is arranged on the inner wall of the shell; the heat dissipation liner 102 is provided with a ground wire. The particular heat sink liner 102 may be a copper sheet or other multi-layer heat sink. The copper sheet can be selected preferably, heat dissipation can be better carried out, and the design of ground connection is adopted, so that the safety in use can be further ensured.

In a specific embodiment, the present solution may further include: an EMI suppression module 7; wherein the access port 1 is connected with the first rectification circuit 2 through the EMI suppression module 7. Specifically, considering that the application environment of the charger has a large number of electronic devices or electronic components, the design of the EMI suppression module 7 can avoid the electromagnetic interference of the surrounding environment as much as possible, and ensure the normal operation of the electronic devices and the electronic components in the surrounding environment. Thus, as shown in fig. 2, the EMI suppression module 7 includes: a common mode choke coil. The Common mode Choke, also called Common mode inductor (Common mode Choke), passes through a bidirectional filter: on one hand, common mode electromagnetic interference on a signal line is filtered, on the other hand, electromagnetic interference which is not emitted outwards is restrained, and normal work of other electronic equipment under the same electromagnetic environment is prevented from being influenced.

Therefore, the embodiment of the utility model provides a novel gallium nitride charger is proposed, include: the power supply control circuit comprises an access port 1 connected with an external power supply, a first rectification circuit 2, a PFC circuit 3, an LLC circuit 4, a second rectification circuit 5 and a DC-DC conversion circuit 6; the PFC circuit 3 includes a PFC boost loop 31 and a PFC main control IC 32; a first gallium nitride switch is arranged in the PFC boost loop circuit 31; the PFC master IC32 is connected to the gallium nitride switch to control the PFC boost loop 31 and provide a PWM switching signal for the first gallium nitride switch; the access port 1 is connected with the first rectifying circuit 2, the first rectifying circuit 2 is connected with the PFC boost loop 31, the PFC boost loop 31 is connected with the LLC circuit 4, the LLC circuit 4 is connected with the second rectifying circuit 5, and the second rectifying circuit 5 is connected with the DC-DC conversion circuit 6, so that power is output through an output port of the DC-DC conversion circuit 6. Through setting up PFC circuit 3 and LLC circuit 4 in charging circuit, through the gallium nitride switch that wherein adopts, based on the characteristic of gallium nitride switch high frequency switch, when improving charging power and charging speed, can also effectively reduce the volume of whole charger, compromise power and volume, realized better charging experience.

Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.

Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.

The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario.

The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.

Claims

1. A novel gallium nitride charger, comprising: the power supply control circuit comprises an access port, a first rectification circuit, a PFC circuit, an LLC circuit, a second rectification circuit and a DC-DC conversion circuit, wherein the access port, the first rectification circuit, the PFC circuit, the LLC circuit, the second rectification circuit and the DC-DC conversion circuit are connected with an external power supply; the PFC circuit comprises a PFC boost loop and a PFC main control IC; a first gallium nitride switch is arranged in the PFC boost loop; the PFC master control IC is connected with the first gallium nitride switch so as to control the PFC boost loop and provide a PWM (pulse width modulation) switching signal for the first gallium nitride switch; the access port is connected with the first rectifying circuit, the first rectifying circuit is connected with the PFC boost loop, the PFC boost loop is connected with the LLC circuit, the LLC circuit is connected with the second rectifying circuit, and the second rectifying circuit is connected with the DC-DC conversion circuit so as to output power through an output port of the DC-DC conversion circuit.

2. The novel gan charger of claim 1, wherein the PFC boost loop further comprises: the circuit comprises a first inductor, a second inductor, a third inductor, a first diode, a first capacitor and a protection diode; the first rectifying circuit is connected with the first inductor; the first inductor is connected with the second inductor, the second inductor is connected with the third inductor, the third inductor is connected with the anode of the first diode, and the cathode of the first diode is connected with the first end of the first capacitor; a first end of the first capacitor is connected with the LLC circuit, and a second end of the first capacitor is grounded; one end of the protection diode is respectively connected with the first inductor and the second inductor, and the other end of the protection diode is respectively connected with the first diode and the first capacitor; one end of the gallium nitride switch is connected with the first inductor and the second inductor respectively, and the other end of the gallium nitride switch is connected with the second inductor and the third inductor respectively.

3. The novel gan charger according to claim 1 or 2, wherein the first gan switch is provided with a PWM interface, and the first gan switch is connected to the PFC main control IC through the PWM interface.

4. The novel gan charger of claim 1, wherein the LLC circuit includes an LLC master IC, a second gan switch, and a third gan switch; the second gallium nitride switch and the third gallium nitride switch are both provided with PWM interfaces, the LLC main control IC is provided with two PWM contacts, and the LLC main control IC is connected with the PWM interface on the second gallium nitride switch through one PWM contact and is connected with the PWM interface on the third gallium nitride switch through the other PWM contact.

5. The novel GaN charger of claim 4, wherein the LLC circuit further comprises: a fourth inductor, a fifth inductor, a second capacitor, a third capacitor, a second diode and a transformer;

6. The novel gallium nitride charger according to claim 1, wherein said output port comprises any combination of a plurality of: Type-C interface, USB interface, Lighting interface.

7. The novel GaN charger according to claim 1 or 6, further comprising a controller for performing power distribution;

8. The novel gallium nitride charger according to claim 1, further comprising: a housing: the access port, the first rectifying circuit, the PFC circuit, the LLC circuit, the second rectifying circuit and the DC-DC conversion circuit are arranged in the shell respectively.

9. The novel gallium nitride charger according to claim 8, further comprising a heat dissipating liner disposed on an inner wall of said housing; the heat dissipation lining is provided with a grounding wire.

10. The novel gallium nitride charger according to claim 1, further comprising: an EMI suppression module; wherein the access port is connected to the first rectifying circuit through the EMI suppression module.