tanhong007
Newbie level 4
![pic01.png pic01.png](https://www.edaboard.com/data/attachments/7/7741-9d5ae8737e1cea8805e2164eb1e7ba51.jpg)
Dear all, with the attached is the circuit schematic.
I tried to do the calculation for the power supply part of TPS92001.
I have a few questions about the circuit:
Is the D2 work as a snubber in this circuit?
What is the C6 used for?
How the PNP part works to maintain the supply voltage for the chip TPS92001.
Thank you very much for all your time and efforts!:smile: