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Original question:

CSD87381P: Higher voltage variant for CSD87381 or similar

CSD87381P: Snubber circuit

Shunsuke Nagata
Genius 12620 points
Part Number: CSD87381P

Hi,

I would like to set Snubber circuit.

I understand user should check the affection by changing Rsnb and Csnb but I would like to know start point.

I guess below calculation may be useful.

-  Csnb = 2Cp
-  Rsnb = Vs / Is= Vout / Iout

Q1) Could you please let me know Cp in Low side of CSD87381P?
Q2) Is there recommend calculation for snubber circuit?

The system is 
- VIN = 12V
- VOUT = 0.85V
- IOUT = 10A

Regards,
Nagata.

  • 0
    TI__Expert 7445 points

    Nagata san,

    Thanks for your interest in our FETs.

    Q1) Cp in the MOSFET datasheet is known as Coss, please see fig 16 in the CSD87381P datasheet for th elow side or sync FET.

    Q2) I found this article on this e2e forum that talks about snubber design for buck converters here: