UCC5870-Q1: question about gate driver of resistor (Rg)

Jay wang

Expert 3171 points

Part Number: UCC5870-Q1

Hi experts

i have two questions about Rg

Q1: how to place Rg? close to OUTH/OUTL of IC or close to Power switch?

Q2: if Rg consists of multiple parallel resistors, what should i am careful about ?

pls share your comments.

additionally, i cannot find SLLA385 on ti.com as described in UCC5870 datasheet.

over 2 years ago

0 Daniel Norwood over 2 years ago

TI__Expert 5921 points

Hello Jay,

Thank you for reaching out.

Q1: Gate resistors should be placed as close to the power switch.

Q2: There are no specific considerations for parallel resistors. I would recommend putting the resistors close together, but the exact location is not a big deal.

SLLA385 can be found here: https://www.ti.com/lit/an/slla385a/slla385a.pdf?

Regards,

Daniel

0 Jay wang over 2 years ago in reply to Daniel Norwood

TI__Expert 3171 points

hi Daniel

thanks for your professional comments

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UCC5870-Q1: question about gate driver of resistor (Rg)