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TPS563201: TPS563201&TPS564201: Questions for over-current limit(OCL)

Part Number: TPS563201

Hi Experts,

TPS563201 over-current limit (OCL) is implemented using a cycle-by-cycle valley detect control circuit. But I find, when the valley current exceeds the threshold, there is no immediate protection, but action after a few cycles, which does not match the description of cycle-by-cycle detect control.

The picture below is the waveform when I tested TPS563201, please help me to find which lead to mismatch, thanks a lot!