i'm using TPS2660 0 and everything is working fine. TPS26600 mode pin is left open, so it works as a circuit breaker with auto retry mode. FLT# Pin is pulled up with 4K7 resistor to OUT. Furthermore the FLT# pin is working on the anode of an optocoupler. If a fault condition happens, TPS26600 shuts down the voltage at OUT and FLT# pin is low. But: in hic up mode the fault pin goes up whenever the chip tries to put on the voltage on OUT and then goes low again when the fault persists. Reading datasheet page 22, figure 41 the FLT# pin is always low during fault condition as i expected.
What went wrong? Please let me know if you need any further information.
Thanks a lot.
Kind regards Thomas