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TPS54061: TPS54061 ocp behavior

Part Number: TPS54061

Hi Team,

Customer have some question about TPS54061 OCP behavior.

Test condition:

VIN = 24V, Iload = 0.1A ~ 0.4A. T = 1ms, 50% duty, slew rate : 32mA/us

Questions:

1.When the output load are 0.1A, why device stop switching?

2. The waveform shown sw node switching but output drop. Any possible reason? 

Waveform:

Shaq