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TPS22976: Over current problem & How to protect

Leo He
Intellectual 420 points
Part Number: TPS22976

We test TPS22976 that   11A  current could keep 0.5~0.7ms .   

Dose  it mean that it will   trigger start protection in more than 0.5~0.7ms .

Thank you for your answer in advance!

  • 0
    TI__Genius 10855 points

    Hi Leo, 

    Thanks for reaching out on E2E!

    Depending on the input voltage and operating temperature, you could be entering thermal shutdown on the device. Can you comment on your operating conditions, and output load resistance / capacitance?

    You can calculate the power dissipation of the device using the following equation:

    Power Dissipation = Iload^2 * Ron

    Tj = Ta + RθJA*Power Dissipation

    If the junction temperature of the device is exceeding 160C, which is the thermal shutdown temperature, then the device will turn off to protect itself.

    Thanks,

    Arthur Huang