Love Tomb Style No. 574-SC8812 Development Board-F103C8T6 Development Atmosphere

This is a development board, but there are still problems with this development board

The main problem at present is that the inductor will whistle when the 4S lithium battery is input and the output is 20V.

When the output is below 15V, the voltage waveform is relatively stable.

You can use F103C8T6 (this control module has an independent number: No. 589)

Or use ESP-PICO-D4 which is not yet open source (also has an independent number: 566)

Come and mate with this SC8812 development board

VBUS side:

With A+C port output, XT30 and A port are directly connected to the VBUS trunk line 

DC port and C port are respectively connected to the VBUS trunk line through PMOS. The PMOS of C port is controlled by FS512.

The PMOS of the DC port is controlled by SC8812

VBAT test:

XT30 directly connected to VBAT trunk line

Port C is connected to the VBAT trunk line through a PMOS managed by HUSB238

There are 4 independent buttons on board,

The PSTOP INT CE pin of SC8812 has a complete lead-out or pull-up

A more detailed introduction to the opening of another project on No. 589