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GaN 30W USB C Fast Charger

Disassembly report: GOOD-SHE Tech Mini 30W Gallium Nitride Fast Charger

owadays, 20-30W mini chargers are very popular in the market. For this reason, GOOD SHE Tech recently launched ultra-thin 20W biscuit chargers and 30W-class mini fast chargers for customers to choose from. The former is designed for iPhone 12 users and is compact and portable.

The 30W mini charger is designed for other brands of mobile phones to meet the user's demand for more powerful mini chargers. This charger has two styles, fixed and folding pins, to meet the needs of different scenarios such as home office and carrying out, and has passed CCC, FCC, PSE, ETL certification, and can be used in major countries or regions around the world.



1. The appearance of GOOD SHE Tech Mini 30W GaN Fast Charge


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The front of the box is printed with the name of the charger, a sketch of the appearance, and three close-up logos, which are concise and protruding.

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The front of the box is printed with the name of the charger, a sketch of the appearance, and three close-up logos, which are concise and protruding.

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Product parameters and certification information are printed on the side.

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Only charger in the package


In fact, GOOD SHE Tech mini 30W GaN charger has two styles, fixed and folding pins, which can meet the needs of home office and portable use.

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The body length of the two chargers is different, the folding pin style is slightly longer, and the extra pin is exactly the position of the pin.

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In addition, the cross-sectional size of the two is the same, and the performance parameters are also the same. Let's take the fixed pin style as an example to introduce.

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The charger adopts a small square shape design, a PC flame-retardant white shell, a waist drawing process, a high-gloss top surface, and the overall appearance is very simple.

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Charger parameter information is marked on the input shell

Model: GS-W30A0931

Input: 100-240V~ 50/60Hz 0.8A

Output: 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.5A,

PPS: 3.3-11V3A

The products have passed CCC, FCC, PSE, ETL certification

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Equipped with US standard pins.

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The top surface of the output is slightly convex, equipped with a single USB-C port, and the white rubber core does not expose copper.

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The height of the charger body is measured to be 34.9mm.

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The width is 32.13mm.

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The thickness is 32.08mm. According to the three-dimensional calculation, the volume of the charger is about 35.97mm. If it is calculated by 30W power, the power density is 0.83W/cm³; if it is calculated by 33W power, the power density is 0.92W/cm³.

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Compared with iphone 30W charger, the volume advantage is very obvious.

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The cross section is larger than a dollar coin。

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The net weight of the charger is about 43g.

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Use ChargerLAB POWER-Z KT002 to detect the USB-C port output protocol, showing that it supports Apple 2.4A, Samsung 5V2A, DCP protocol, and QC2.0/3.0, AFC, PD3.0, PPS fast charge protocol.

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In addition, the PDO message shows that port C also has five fixed voltage gears of 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.5A, and two sets of PPS voltage gears of 3.3-11V3A and 3.3-16V2A.

2. GOOD SHE Tech Mini 30W GaN Fast Charge Disassembly

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The input end shell is disassembled, the pins are crimped with the metal sheet, and the contact is energized.

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The measured module length is 31.35mm.

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21.32mm width

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The thickness is 25.06mm.

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PCBA module adopts three small board combination welding design.

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Glue reinforcement between components.

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The input and output capacitors are covered with an insulating plastic shell. Through observation, it is found that the 30W mini charger of GOOD SHE Tech adopts a high-frequency QR switching power supply with a wide range of output, and the design architecture of the protocol chip to control the output voltage of the interface. Below we start from the input terminal to understand the information of each device one by one.


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A rectifier bridge and a switching power supply main control chip are arranged on the back of the input end small board.

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Separate the module, the middle of the two small boards is an integrated plastic insulator, the front of the input end small board is equipped with fuses, NTC surge suppression resistors, common mode inductance, filter capacitors, I-shaped inductors, transformers, etc.

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The fuse jacket is protected by an insulating tube.

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NTC surge suppression resistor is used to suppress the power-on surge current and reduce the impact of plug-in.


A close-up of common mode inductors, used to filter out EMI interference.

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WRMSB30M rectifier bridge close-up.

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The three high-voltage filter electrolytic capacitors are from Emerald, the specifications are all 400V 18μF.

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I-shaped inductance jacket heat shrinkable tube.

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The power supply capacitor specification of the main control chip is 50V 10μF.

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The main control chip of the switching power supply is Nanxin SC3021D, which supports 170KHz GaN direct drive and is specially designed for 30W GaN chargers. Under this scheme, ATQ17/15 winding transformers can be used, which is very cost-effective.

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It is understood that Nanxin SC3021x meets various high-frequency QR fast charging needs, adopts a proprietary GaN direct drive design, eliminating external drivers or discrete drive devices; integrated segmented power supply mode, single-winding power supply, no complicated power supply Circuit; built-in high voltage start and AC input Brown In/Out function, integrated X-cap discharge function

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Close-up of the transformer, tightly wrapped with insulating tape.

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A gallium nitride power switch tube, an optocoupler and a patch Y capacitor are provided on the front side of the connecting plate.

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The GaN power chip adopts InnoSec INN650DA04, with a withstand voltage of 650V, and a conduction resistance of 480mΩ (max). It has the characteristics of high frequency and high efficiency, very low loss, and fast active heat dissipation. At the same time, it adopts DFN5*6 package to achieve small size and high Efficient charger design.

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InnoSec INN650DA04 data information.

CONTACT US

Contact: Jelly Pan

Phone: 18665806839

Tel: 0755-29969955

Email: jelly@good-she.com

Add: Daronghua Technology Park Building, Jiuwei Road 15, Xixiang Street, Baoan District, Shenzhen

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