Hello,
I have some problems with TPS65288 when turning on one of the bucks (buck 1). The buck 2 & 3 are enabled first, and later on buck 1 is turned on from MCU (EN1 goes high). The problem is that when the buck 1 load is fully discharged, after turning it on (about 20ms after EN1 goes high) the whole PMIC goes off (all three bucks) for about 20ms, and then retries turning on the bucks. It seems to me that buck 1 detected overcurrent condition (lasting more than 10ms) and the device hiccup mode is entered.
My questions are:
- is there a way to tell if there is overcurrent condition?
- is there a way to get around this (manipulating enable, slow-start, current limit)
Any help is greatly appreciated
Best, Andy