About Feedforward capacitor value

GARAM AN

Hello all,

I learned that feedforward capacitor value should be careful, the value has limit at the bandwidth is 1/5 of switching frequency.

Can you tell me why the bandwidth should be 1/5 of fsw?

What is going to be happened if I put the higher feedforward capacitor value?

Thank you

0 Daniel Li14 over 5 years ago

Hi:

It is engineering setup for 1/5 fsw, higher cross frequency will make the loop don't have enough phase or gain margin.

Thanks

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