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TPS54560: TPS54560 Overheat Issues

Expert 2385 points
Part Number: TPS54560

Hi Ti,

I am working on TPS54560 with the below specs

Vin: 24V

Vout: 12.4V

Iout: 4.2A ~ 4.4A

The load resistor (3 ohm) is used to to draw contstant Iout at 4.2A to 4.4A, after few seconds the IC overheat at 150degC and faced thermal shut down. We did the same testing on TPS54560EVM-515 but the junction temperature of the IC is only 50degC at 4.4A.

We have also checked that the power pad is properly soldered.

I have attached the schematic below.

Kindly please help to advise.