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TPS24751: TPS24751 reverse current blocking

[FAE] Andrew Wang
Genius 10685 points
Part Number: TPS24751
Other Parts Discussed in Thread: TPS24750

Hi Team,

Just one quick question, I thought TPS24750/51 is already reverse current blocking load switch, am I correct? 

If yes, why we have example as below in the datasheet?

Thanks for clarify!

Andrew

  • 0
    TI__Guru** 105361 points

    Hi Andrew,

    TPS24750/1 does not provide reverse current blocking due to the body diode of the internal MOSFET (shown below). Can you share your requirements to suggest appropriate solution.

    What is the target application use case?

    Best Regards,

    Rakesh

  • 0
    TI__Guru 57737 points

    Hi Andrew,

    TPS24750/51 do not have the reverse blocking FET integrated into it. You can see the Functional block diagram in the datasheet.

    Also, please note that even with external reverse current blocking FET, the reverse current is blocked only when the device is disabled.

    This is because TPS24750/51 doesn't have any control logic to detect reverse current and turn OFF the FET's. The external blocking FET is connected to the GATE pin which is same GATE signal given to the internal FET.  

  • 0 in reply to Praveen GD
    TI__Genius 10685 points
    Thanks for the detail explain, have a nice day!!