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LM5176: LM5176 can not take up the load

Raymond He
Expert 1990 points
Part Number: LM5176

    Dear

     LM5176 can not take up the load,  power supply full power is 450 w, is currently in 2 groups of 225 w LM5176 IC control circuit of the parallel test, the output voltage is 12 v, below 19 v can bring full, but aging for A few minutes MOS tube and IC after the temperature rise to about 60 ℃ or so off voltage will happen until the protection, pick up the load model is to use electronic load CC model test with 37.5 A 

any advive? thanks in advance

  • 0
    TI__Guru 66350 points

    Hello Raymond,

    Would you please share your schematic?

    Is it correct that you are using 2 times LM5176 which shall share the load and the full load is 450W? Are you increasing the load after the converters turned on or did you already apply the load when the converter is not yet started?

    How do you connect the 2 converters and which one is the main converter?

  • 0 in reply to Brigitte
    TI__Guru 66350 points

    Hello Raymond,

    I expect that you have been able to solve the issue. If this is not the case, please post some more information about it below or if this thread is already locked, please start a new one.