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TPS54560: TPS54560DDAR, OVERHEAT, THERMAL SHUTDOWN

nacho diz castro
Prodigy 70 points
Part Number: TPS54560

Dear All

We´re an Important automotive company

We´re designing an Electronic System that Includes TPS54560DDAR

Starting from 3A Load the Buck IC gets too hot compared with our previous buck from another vendor (BD9G341AEFJ)

If 4A load the IC turns of due to Juntcion Overheat

If 4A, Tcase is 120C (AgilentU1242 + K Thermocouple)

PCB is 4layers, solid ground plane









Kind regards

  • 0
    TI__Guru 57555 points

    From your layout I can not tell if there is a large top side ground plane/heatsink.

    Although it is important to have ground plane/heatsinks on all layers, the bottom and

    middle layers are not as effective as the top side where the device is mounted.

    Also, it would be more effective to have your thermal vias for the device

    closer to the center of the packaged; and perhaps a few more.  

    Finally, be sure that the DAP is well soldered to the ground plane on top (if there is one).

    Sometimes not enough heat is used, and the DAP does not get completely soldered to the 

    ground plane/heatsink.

  • 0 in reply to Frank De Stasi
    TI__Guru 57555 points

    I am closing this due to inactivity.