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Digital IO controlls the power supply for other board

guohui Xu
Prodigy 220 points
Other Parts Discussed in Thread: TPS25942A

Hi,

I am looking for an IC to achieve that using one of the MCU's GPIOs to control the power supply for another board. I want just control the on/off state of the power. E.g.,If the IO output a high level, the power is supplied for another board, and if the IO output a low level, the power is cut off from the another board. I have been looking for the IC for a bit long time but a waste of time. Is there any suggested IC for my application?

Thanks.

Guohui.

  • 0
    TI__Expert 5275 points

    Hi Guohui,

     

    It looks like you have come to the right place.  TI integrated load switches perform this function.  In you can share some more about the system requirements, I can help to determine which part is best.

     

    1. What is the voltage range?

    2. What is the load current for the other board?

    3. Since there is a separate board, are there any ESD, hotswap, or reverse current protection requirements?

     

    Best Regards,

    Adam Hoover

    DLS Applications

  • 0 in reply to Adam Hoover
    Prodigy 220 points

    Hi, Adam,

    Thanks for your kindly help!

    1. The voltage range from 3.3V at least to 12V or above will be better.

    2. The load current may be up to 2A since it may drive a motor.

    3. Yes,  equipting both will be better

    There is one more requirement that  the load swith must be bidirectional as the board may power for another board or accept power from another board. Is there an IC owns these abilities?

     

    Best regards,

    Guohui

  • 0 in reply to guohui Xu
    TI__Expert 5275 points

    Hi Guohui,

     

    Currently there are no integrated load switches available for votlages above 5.5V.   You could use the TPS25942A eFuse in this situation.  Although it does have reverse current protection all the time to would would need one to receive power and the other to deliver power.   The up side is this will provide very robust reverse current protection.

     

    Regards,

    Adam

  • 0 in reply to Adam Hoover
    Prodigy 220 points

    Hi Adam,

    Thanks for your help.

    I'll try this IC in my application. 

    Thanks!

    Best regards,

    Guohui