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LM5175: controller self-heating

Robin Liu
Intellectual 1920 points
Part Number: LM5175

Tool/software:

hi BU,

for the LM5175, there is 2 issue with below board, please help check what's the issue?

1. the LM5175- self is heating, about 80C, 

2. the load abililty is limit, not as design target, 

LM5175 test.pdf

regards,

robin Liu3286.mosfet.pdf

  • 0
    TI__Guru 58461 points

    Hi Robin,

    thank you for supporting the LM5175.

    Could you please attach the filled out LM5175QUICKSTART-CALC to this thread? 

    This will give the best overview on the application setup and requirement.

    Can you also add some more details on the conditions:

    - Under which condition does the controller heat up to 80Deg.

    - for Point 2 the Quickstart calculator should give most of the required answers.

    - the Compensation network on COMP is wrong - please check this again - here also the Quickstart calculator can help

       Note: it should be R + C with an C in parallel   - schematic shows   R  +   R with C in parallel

    Best regards,

     STefan