Hi expert,
My customer have an issue of the noise coupling to FB node.
Their equipment is very noisy. also they found the issue of Vout oscillation sync to equipment noise.
This issue was improved when they try small FB resistance(1kohm + 220kohm). We think, it is due to the noise coupling to FB node.
Now they are using 100kohm and 22kohm from datasheet recommendation.
(Also, we are discussing PCB layout of FB node. but this equipment is already released to market, they want to modify just component value.)
Could you please let me know the recommended minimum FB resistors?
Also, please let me know the degraded by small resistor. the efficiency, loss on FB resistors, and anything else?
Thanks
Muk
