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LM3481-FLYBACKEVM: How to make response faster

Part Number: LM3481-FLYBACKEVM
Other Parts Discussed in Thread: LM3481

Hello all,

I replaced R16 to 1kOhm in order to make the output voltage to 5V. Changing the output voltage, the phase/gain margin may change, so I measured those margin by FRA by putting 50Ohm resistor on R8. The result is like the below:

I would like to make the response faster. How can I change the frequency of poles and/or zeros, and add poles and zeros? I think R17, C19, R12, C15, R10, C16 might be related to this. Can you share your ideas?

Best regards,
RYO