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TPS65217: Behavior after an overvoltage condition

Part Number: TPS65217
Other Parts Discussed in Thread: AM3352


We have one board using a TPS65217 and a AM3352 microcontroller. The PMIC is used in 5V only. 5V is connected to AC, BAT pins are pull-down according to document SLVA901. Note that the latest datasheet specifies to let these pins open by the way.

When running various tests, I noticed that if I artificially create an overvoltage condition on AC, let's say 6.5V during 50ms, then the PMIC enters the OFF state. This is what is written in the datasheet. But, I would have expect that the PMIC restart by itself. It's not the case. To be clear, AC does 5V -> 6.5 -> 5V.

  • Which conditions trigger precisely the overvoltage event ? There is a threshold, but is there a minimal duration of the overvoltage ?
  • Why the PMIC stays in the off state ?

Thank you,