CN117728541A - Portable GaN charger - Google Patents

Abstract

The invention relates to the technical field of chargers and discloses a portable GaN charger which comprises a lower shell, wherein an upper shell is arranged on the outer side of the top of the lower shell, and pins are arranged at the bottom of the lower shell; the top intermediate position of inferior valve is provided with the clamp plate, and top one side of inferior valve is provided with the mainboard, and the inboard of mainboard is provided with the EMI circuit board, and the top opposite side of inferior valve is provided with the DC circuit board, is provided with the USB circuit board between DC circuit board and the mainboard, and one side of USB circuit board is provided with first TYPE circuit board, and one side of first TYPE circuit board is provided with the second TYPE circuit board, and one side of second TYPE circuit board is provided with the TF circuit board. The invention adopts the GaN scheme, has compact structure, can effectively utilize the internal space through reasonable layout, reduces the volume of products, has the characteristics of small volume and high power, can further save the internal space of the charger, realizes multifunctional multi-port quick charging, and is convenient to carry when going out.

Description

Portable GaN charger

Technical Field

The invention relates to the technical field of chargers, in particular to a portable GaN charger.

Background

The gallium nitride charger is a charger adopting gallium nitride technology, and realizes small-volume, light-weight and high-efficiency charging by utilizing the characteristics of gallium nitride materials. Specifically, the gallium nitride material has the characteristics of super heat conduction efficiency, high temperature resistance, acid and alkali resistance and the like, so that the charger can stably work in a high-temperature environment and has higher charging efficiency. On the charging protocol, the gallium nitride charger supports the mainstream fast charging protocols such as PD, QC and the like, and can meet the charging requirements of different devices. In addition, the volume of the gallium nitride charger is obviously reduced compared with that of the traditional charger, but the charging power of the gallium nitride charger can reach the same or even higher level.

Meanwhile, the gallium nitride charger has the characteristics of low switching loss, high efficiency and the like, so that the energy loss in the charging process is smaller, and the charging efficiency is higher. In a word, the gallium nitride charger is a device for realizing high-efficiency charging by using gallium nitride materials, has the characteristics of small volume, light weight, high efficiency and the like, and is suitable for the charging requirements of various electronic equipment.

However, for business persons who often need to go on business, the most annoying case is to carry several chargers, including chargers of mobile phones, tablets and notebooks, which greatly increase the travel burden, and several sockets are required for multiple devices to be charged simultaneously to meet the charging requirement.

For the problems in the related art, no effective solution has been proposed at present.

Disclosure of Invention

The present invention provides a portable GaN charger to overcome the above-mentioned problems of the prior art.

For this purpose, the invention adopts the following specific technical scheme:

a portable GaN charger comprises a lower shell, wherein an upper shell matched with the lower shell is arranged on the outer side of the top of the lower shell, and a pin matched with the lower shell is arranged at the bottom of the lower shell; a pressing plate is arranged in the middle of the top of the lower shell, and elastic sheets matched with the pins are arranged between the two sides of the bottom of the pressing plate and the lower shell; a main board is arranged on one side of the top of the lower shell, an EMI circuit board is arranged on one side of the inner side of the main board and positioned on the pressing plate, a plurality of input electrolytic capacitors are arranged on the top of the EMI circuit board, and an output solid capacitor is arranged on the top of the inner side of the main board; the top opposite side of inferior valve is provided with the DC circuit board, be provided with the USB circuit board between DC circuit board and the mainboard, be provided with USB output port on the USB circuit board, one side of USB circuit board is provided with first TYPE circuit board, be provided with first TYPE output port on the first TYPE circuit board, one side that USB circuit board was kept away from to first TYPE circuit board is provided with the second TYPE circuit board, be provided with second TYPE output port on the second TYPE circuit board, one side that first TYPE circuit board was kept away from to the second TYPE circuit board is provided with the TF circuit board, be provided with the transformer on the TF circuit board.

Furthermore, in order to save space, a storage groove matched with the pin is formed in one side of the bottom of the lower shell. A waterproof foam is arranged between the pressing plate and the lower shell, and the pressing plate is connected with the lower shell through a plurality of bolts. The bottom of the EMI circuit board is provided with a plurality of AC wires which are respectively electrically connected with the pins and the main board.

Furthermore, in order to better realize the charging requirement, the input electrolytic capacitor is used for rectifying and filtering the input signal, and the output solid-state capacitor is used for filtering the output signal. The DC circuit board is used to provide a stable voltage to the main board. The main board is also provided with a PWM circuit, an output synchronous rectification circuit, a protocol IC control circuit and an MCU main control circuit; the transformer realizes energy transfer through control adjustment with the PWM circuit, the output synchronous rectification circuit is used for rectifying an output synchronous signal to form energy conversion, the protocol IC control circuit is used for intelligently connecting a first TYPE output port, a second TYPE output port and a USB output port according to the charging equipment to realize power distribution, the aim of quick charging is achieved, and the MCU main control circuit is used for controlling the whole circuit. The chip model in the protocol IC control circuit is SW3536, and the gallium nitride chip model in the MCU master control circuit is SC3057.

The beneficial effects of the invention are as follows:

1) The invention adopts the GaN scheme, has compact structure, can effectively utilize the internal space through reasonable layout, reduces the volume of products, has the characteristics of small volume and high power, can further save the internal space of the charger, realizes multifunctional multi-port quick charging, and is convenient to carry when going out.

2) The invention adopts the structure design of the upper and lower shells and the house-building Type with five circuit boards installed inside, and the design of the folding pins, thereby greatly saving the space, having the advantages of small volume and convenient carrying, simultaneously having 1 USB-A port and 2 Type-C ports, realizing multi-port and multifunctional quick charging and further improving the charging performance.

3) The GaN chip adopts the SC3057+INN150LA070A scheme, the protocol chip adopts SW3536, and simultaneously, the three ports of the 1 USB-A port and the 2 Type-C ports are mutually independent and are not influenced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a portable GaN charger according to an embodiment of the invention;

fig. 2 is a schematic view of an internal structure of a portable GaN charger according to an embodiment of the invention;

fig. 3 is a schematic view showing an internal structure of a portable GaN charger according to an embodiment of the invention at another angle;

FIG. 4 is an exploded view of FIG. 2;

fig. 5 is an overall logic frame diagram of a portable GaN charger according to an embodiment of the invention.

In the figure:

1. a second TYPE circuit board; 2. a first TYPE circuit board; 3. a USB circuit board; 4. a TF circuit board; 5. a main board; 6. a DC circuit board; 7. an EMI circuit board; 8. an AC line; 9. a bolt; 10. a pressing plate; 11. waterproof foam; 12. a spring plate; 13. pins; 14. a lower case; 15. a second TYPE output port; 16. a first TYPE output port; 17. a USB output port; 18. a transformer; 19. inputting an electrolytic capacitor; 20. outputting a solid-state capacitor; 21. an upper case; 22. and a storage groove.

Detailed Description

For the purpose of further illustrating the various embodiments, the present invention provides the accompanying drawings, which are a part of the disclosure of the present invention, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present invention, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.

According to an embodiment of the present invention, there is provided a portable GaN charger.

The invention will now be further described with reference to the accompanying drawings and detailed description, as shown in fig. 1 to 5, a portable GaN charger according to an embodiment of the invention includes a lower case 14, an upper case 21 cooperating with the lower case 14 is provided at the top outside of the lower case 14, and a mating pin 13 is provided at the bottom of the lower case 14; a pressing plate 10 is arranged in the middle of the top of the lower shell 14, and a spring piece 12 matched with the pin 13 is arranged between the two sides of the bottom of the pressing plate 10 and the lower shell 14; a main board 5 is arranged on one side of the top of the lower shell 14, an EMI circuit board 7 is arranged on one side of the inner side of the main board 5 and positioned on the pressing board 10, a plurality of input electrolytic capacitors 19 are arranged on the top of the EMI circuit board 7, and an output solid capacitor 20 is arranged on the top of the inner side of the main board 5; the top opposite side of inferior valve 14 is provided with DC circuit board 6, be provided with USB circuit board 3 between DC circuit board 6 and the mainboard 5, be provided with USB output port 17 on the USB circuit board 3, one side of USB circuit board 3 is provided with first TYPE circuit board 2, be provided with first TYPE output port 16 on the first TYPE circuit board 2, one side that USB circuit board 3 was kept away from to first TYPE circuit board 2 is provided with second TYPE circuit board 1, be provided with second TYPE output port 15 on the second TYPE circuit board 1, one side that first TYPE circuit board 2 was kept away from to second TYPE circuit board 1 is provided with TF circuit board 4, be provided with transformer 18 on the TF circuit board 4.

In one embodiment, a receiving groove 22 is formed at one side of the bottom of the lower case 14 to be matched with the pins 13. A waterproof foam 11 is arranged between the pressing plate 10 and the lower shell 14, and the pressing plate 10 is connected with the lower shell 14 through a plurality of bolts 9. The bottom of the EMI circuit board 7 is provided with a plurality of AC lines 8 electrically connected to the pins 13 and the motherboard 5, respectively.

In one embodiment, the input electrolytic capacitor 19 is used to rectify and filter the input signal, and the output solid state capacitor 20 is used to filter the output signal. The DC circuit board 6 is used to provide a stable voltage to the main board 5. The main board 5 is also provided with a PWM circuit, an output synchronous rectification circuit, a protocol IC control circuit and an MCU main control circuit; the transformer realizes energy transfer through control adjustment with the PWM circuit, the output synchronous rectification circuit is used for rectifying an output synchronous signal to form energy conversion, the protocol IC control circuit is used for intelligently connecting a first TYPE output port, a second TYPE output port and a USB output port according to the charging equipment to realize power distribution, the aim of quick charging is achieved, and the MCU main control circuit is used for controlling the whole circuit. The chip model in the protocol IC control circuit is SW3536, and the gallium nitride chip model in the MCU master control circuit is SC3057.

As shown in fig. 5, the overall circuit characteristics of the portable GaN charger are: the alternating current input forms direct current voltage after passing through an input rectifying and filtering circuit; the transformer circuit realizes energy transmission through control adjustment with the PWM circuit; the output synchronous rectification circuit forms energy conversion, so that conversion efficiency is improved; the output filter circuit filters the energy transmitted by the transformer circuit, so that more stable output is obtained; the protocol IC control circuit is intelligently connected with TYPE-C1, TYPE-C2 and USB-A output ports according to the charging equipment to realize power distribution so as to meet the power output and achieve the aim of quick charging; the MCU master control circuit controls the whole circuit; the LDO circuit provides stable voltage for the MCU master control circuit.

The correspondence between the logic block diagram in fig. 5 and the components of the portable GaN charger is as follows:

AC line 8 corresponds to an AC input (alternating current input); the input electrolytic capacitor 19 corresponds to the input rectifying and filtering circuit; transformer 18 corresponds to a transformer circuit; the output solid-state capacitor 20 corresponds to an output filter circuit; the second TYPE output port 15 corresponds to TYPE-C1; first TYPE output port 16 corresponds to TYPE-C2; the USB output port 17 corresponds to USB-A; the main board 5 is provided with a PWM circuit, an output synchronous rectification circuit, a protocol IC control circuit and an MCU main control circuit; an LDO circuit is provided on the DC circuit board 6.

In this embodiment, the primary main control chip of the charger is from south core technology, and an SC3057 seal gallium nitride chip is adopted, and the chip integrates circuits such as a high-performance multimode flyback controller, gallium nitride drive, gallium nitride switching tube, power supply, protection and the like into a QFN6×8 package with enhanced heat dissipation. The number of external elements is simplified by the encapsulation, and the influence of parasitic parameters of the traditional driving wiring on the high-frequency switch is eliminated. The south core technology SC3057 adopts the design that the power wiring and the control wiring are separated, reduces the influence of the high-frequency switch on the control loop, optimizes the design of the charger wiring and the electrical performance through the optimized pad design, and simplifies the design development. SC3057 is internally provided with a 165mΩ gallium nitride switching tube, supports 175KHz switching frequency, and supports X capacitance discharge.

The charger secondary synchronous rectification MOS is INN150LA070A from Innociception, and is an enhanced gallium nitride single tube with a withstand voltage of 150V and a conduction resistance of 7mΩ. The INN150LA070A is packaged by adopting flip-chip FCLGA3.2 x 2.2, so that the INN150LA070A has larger contact area with a bonding pad, lower thermal resistance, effectively reduces temperature rise and obviously improves heat dissipation performance. The high-frequency power amplifier has very low grid charge and ultra-low conduction resistance, can effectively reduce driving loss and conduction loss, and is suitable for synchronous rectification of AC-DC, D-type power amplifier, high-frequency DC-DC converter, communication base station and motor driving.

The protocol IC is the voltage-reducing output of the intelligent SW3536 chip. SW3536 is ase:Sub>A high-integration multi-fast-charging-protocol dual-port charging chip, supports USB-A+USB-C dual-port fast charging output and supports dual-port independent current limiting. A7A high-efficiency synchronous buck converter is integrated inside, and various fast charging protocols such as PPS/PD/QC/AFC/FCP/SCP/PE/SFCP/TFCP are supported, and 140W output power is supported at maximum.

SW3536 integrates the CC/CV mode, the dual-port management logic and the dual-chip dynamic power distribution, and peripheral elements are simplified, so that the dual-port charging solution of the high-performance multi-fast charging protocol is complete. SW3536 supports 36V input voltage, meets 12-24V input vehicle charging application, and is suitable for quick charging adapter, power strip and vehicle charging application. Three SW3536 protocol ICs are adopted to realize that 1 USB-A port and 2 Type-C ports are independent from each other and are not affected by each other.

①TYPE-C1：

PD mode: 5V/3A;9V/3A;12V/3A;15V/3A;20V/3.35A;

PPS mode: 3.3V-11V/5A.

②TYPE-C2：

PD mode: 5V/3A;9V/3A;12V/3A;15V/3A;20V/3.35A;

PPS mode: 3.3V-11V/5A.

③USB-A：

QC2.0/AFC mode: 5V/3A;9V/2A;12V/1.5A;

SCP mode: 4.5V/5A;5V/4.5A;10V/2.25A.

④TYPE-C1+TYPE-C2：

TYPE-C1：5V/3A；9V/3A；12V/3A；15V/3A；20V/2.25A；

TYPE-C2：5V/3A；9V/2.22A。

(5) TYPE-C1 (or TYPE-C2) +USB-A:

TYPE-C1/TYPE-C2：5V/3A；9V/3A；12V/3A；15V/3A；20V/2.35A；

USB-A：5V/3A；9V/2A；12V/1.5A。

⑥TYPE-C1+TYPE-C2+USB-A：

TYPE-C1：5V/3A；9V/3A；12V/3A；15V/3A；20V/2.25A；

TYPE-C2：5V/2.4A；

USB-A：5V/1.5A。

in summary, by means of the technical scheme, the GaN-based charger has the advantages that the GaN-based charger is compact in structure, can effectively utilize the inner space through reasonable layout, reduces the volume of products, has the characteristics of small volume and high power, can further save the inner space, realizes multifunctional multi-port quick charging, and is convenient to carry when going out.

In addition, the invention adopts the structure design of the upper and lower shells and the house-building Type with five circuit boards installed inside and the design of the folding pins, thereby greatly saving the space, having the advantages of small volume and convenient carrying, simultaneously having 1 USB-A port and 2 Type-C ports, realizing multi-port and multifunctional quick charging and further improving the charging performance.

In addition, the GaN chip adopts the SC3057+INN150LA070A scheme, the protocol chip adopts SW3536, and simultaneously, the three ports of the 1 USB-A port and the 2 Type-C ports are mutually independent and are not influenced.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (8)

1. The portable GaN charger comprises a lower shell (14), wherein an upper shell (21) matched with the lower shell is arranged on the outer side of the top of the lower shell (14), and the portable GaN charger is characterized in that a pin (13) matched with the lower shell is arranged at the bottom of the lower shell (14);

a pressing plate (10) is arranged in the middle of the top of the lower shell (14), and elastic sheets (12) matched with the pins (13) are arranged between two sides of the bottom of the pressing plate (10) and the lower shell (14);

a main board (5) is arranged on one side of the top of the lower shell (14), an EMI circuit board (7) is arranged on the inner side of the main board (5) and positioned on one side of the pressing plate (10), a plurality of input electrolytic capacitors (19) are arranged on the top of the EMI circuit board (7), and an output solid capacitor (20) is arranged on the top of the inner side of the main board (5);

the utility model discloses a transformer, including inferior valve (14), DC circuit board (6), USB circuit board (3) are provided with DC circuit board (6) and mainboard (5) between the top opposite side of inferior valve (14), be provided with USB output port (17) on USB circuit board (3), one side of USB circuit board (3) is provided with first TYPE circuit board (2), be provided with first TYPE output port (16) on first TYPE circuit board (2), first TYPE circuit board (2) keep away from one side of USB circuit board (3) is provided with second TYPE circuit board (1), be provided with second TYPE output port (15) on second TYPE circuit board (1), one side that second TYPE circuit board (2) was kept away from is provided with TF circuit board (4), be provided with transformer (18) on TF circuit board (4).

2. A portable GaN charger according to claim 1, characterized in that a receiving groove (22) is provided on the bottom side of said lower case (14) to be fitted with said pins (13).

3. The portable GaN charger according to claim 1, characterized in that a waterproof foam (11) is provided between the pressing plate (10) and the lower case (14), and the pressing plate (10) and the lower case (14) are connected by a plurality of bolts (9).

4. A portable GaN charger according to claim 1, characterized in that the bottom of said EMI circuit board (7) is provided with a plurality of AC lines (8) electrically connected to said pins (13) and said motherboard (5), respectively.

5. A portable GaN charger according to claim 1, characterized in that said input electrolytic capacitor (19) is used for rectifying and filtering an input signal, and said output solid state capacitor (20) is used for filtering an output signal.

6. A portable GaN charger according to claim 1, characterized in that the DC circuit board (6) is adapted to provide a stable voltage to the motherboard (5).

7. The portable GaN charger of claim 1, wherein the main board (5) is further provided with a PWM circuit, an output synchronous rectification circuit, a protocol IC control circuit and an MCU main control circuit;

the transformer realizes energy transfer through control adjustment with the PWM circuit, the output synchronous rectification circuit is used for rectifying an output synchronous signal to form energy conversion, the protocol IC control circuit is used for intelligently connecting a first TYPE output port, a second TYPE output port and a USB output port according to charging equipment to realize power distribution so as to achieve the purpose of quick charging, and the MCU main control circuit is used for controlling the whole circuit.

8. The portable GaN charger of claim 7, wherein the chip model in the protocol IC control circuit is SW3536 and the gallium nitride chip model in the MCU master circuit is SC3057.