The space between the two PCBs is soldered with high-voltage filter capacitors and transformers.

Separate the two small boards by welding, and use a white plastic insulator between the small boards for isolation between the primary electrolytic capacitor and the output solid capacitor.

Through the observation of the charger PCBA module, it is found that Anke's 30W GaN charger adopts a high-frequency QR switching power supply design, uses Nanxin Technology to seal the GaN chip and synchronous rectification controller, and the output voltage is passed by the protocol chip. Optocoupler control.

Next, we will start to understand the design and materials of the entire charger from the input end.

Front view of the small board at the bottom, welding fuse, common mode inductor, synchronous rectifier, VBUS switch tube and USB-C socket. The output filter capacitor is welded by sinking plate to reduce the thickness.