Hi,
From TPS40400 datasheet, IC sense FB node and trigger output UV or OV protection.but the there is no spec about the delay /response time from FB out of limit to protection active. In some case like FB is short to ground (assume external trim resistor is short), and E/A amplifier output will be saturated, duty will be max, Vo maybe rise very fast before FB lower than limit and trigger protection.
so please advise the response time/delay for this UV/OV feature, and in such case, will the UV protection be triggerd?
Regards,
Frank Luo