i've been asked by Customer as below.
1. is it realistically happened that It takes 20sec for start up time as below condition.
start up R...188kohm(there are 4 resister(47k) in series.
Cap for Vcc..470uF
basically it takes 4sec for start up time but customer has seen that it took 20sec just one time.
i know it is difficult to assume though, what root cause can we expect ?
when customer replaced cap for Vcc, customer had seen it one time never happened ever.