Synchronous rectification MOS tube screen printing 66940, from AOS Bandai.

The output filter capacitor is from YMIN, NPX series solid capacitor, the specification is 470μF 25V.

The USB PD fast charging protocol chip adopts Infineon CYPD3174, which supports PD3.0 including PPS protocol, QC4.0, Apple 2.4A and other fast charging protocols; built-in multiple comprehensive protection functions, built-in 32-bit M0 processor, Integrated oscillator and no external clock required.

Weld an NTC thermistor on the left side of CYPD3174 to detect the internal temperature of the USB-C socket and the charger to realize the live protection function.