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TPS2H160-Q1: Overcurrent shot down

na na78
Guru 16770 points
Part Number: TPS2H160-Q1


Hi

Does TPS2H160-Q1 have OCP function?

Or, to protect device, external MCU must turn off TPS2H160-Q1 depending on /FAULT report if overcurrent is detected?

BestRegards

  • 0
    TI__Mastermind 28340 points

    Hello,

    TPS2H160-Q1 has internal and external over current protections. The current limit function regulates the current in the FET at the current limit set. That means it delivers constant current to the load. During over current, the FET is in saturation region. The power losses in the FET is around supply voltage times the current limit set. The high power dissipation rises the junction temeprature Tj and the FET will turn off when Tj is at T(SD) = 175C typical. When the junction cools off and Tj is below 155C typical the FET turns back on agian and the juntion temeprature will be between 155C and 175C. 

    The device is well protected against over current but for longer life time it is better to turn off the FET and do not leave the junction above 150C for long time. 

    Regards

  • 0 in reply to Mahmoud Harmouch
    Guru 16770 points

    Hi Mahmoud

    Thank you for your reply.
    I understood OVP of this device will regulates the current in the FET at the current limit set.

    So, it does not turn off output even if the current reaches current limit set, is it correct?

    And is the fault generated when overcurrent protection worked?

    BestRegards

  • 0 in reply to na na78
    TI__Mastermind 28340 points
    Hello,

    That is right. When the current hits the current limit, it is regulated and stays at the current limit set.
    The FAULT will turn low when overcurrent is detected.

    Regards