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CSD17577Q3A: SOA and MOSFET haven't fully turn off.

Part Number: CSD17577Q3A
Other Parts Discussed in Thread: TPS65982,

Hi All,

My application is typeC PD Vbus switch. This is my schematic.

When i use e-load short Type-C output side. Q7 will damage.

My current limit setting 4.7~5.3A.

Please refer following picture. This is MOSFET damage waveform.

Because TPS65982 have ocp protect. So it has turn off CSD17577Q3A.

Why Vgs=0V. I have measure output still 5A current.

Short point - zoom in