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TPS25921A: Can TPS25921A be used for bi-directional current protection?

Kazuya Nakai59
Guru 20130 points
Part Number: TPS25921A

 Hello guys,

 One of our customers is considering using TPS25921A for bi-directional switch with current limitter.

 Can TPS25921A be used as the attached schematic? Could you please give me your answer or any comment?

 Your reply would be much appreciated.

 Best regards,

 Kazuya Nakai.TPS25921Ax2_solution.pdf

 

 

  • 0
    TI__Guru* 95911 points
    Hi Kazuya Nakai,

    What is the type of load on either side.? Will the load draw current at < 4.5V?
    please let me know the application use case.

    Best Regards,
    Rakesh
  • 0 in reply to Rakesh
    Guru 20130 points
    Hello Rakesh,
    Thank you for your prompt reply.
    The customer wants to insert the switch consist of eFuse between a battery charger and 3 cells of Litium-Ion battery (10.8V typ) for turning on/off and bi-direction current limit protection.

    Could you please give me your comments?

    Thank you again and best regards,
    Kazuya Nakai
  • 0 in reply to Kazuya Nakai59
    TI__Guru* 95911 points
    Hi Kazuya Nakai,

    I did not see any concern in using the device as per the schematic you shared. But note, TPS25921A can support only up to 1.6A. You can consider of using TPS259241 for currents up to 5A.

    let me know, under which operating conditions you want to cut-off the switch?

    Best Regards,
    Rakesh
  • 0 in reply to Rakesh
    Guru 20130 points
    Hi Rakesh,
    Thank you for letting me know the correct device. I will introduce TPS259241 to the customer.

    They want to cut off the battery from the main circuit block by the switch when the block is shutted down compleatly to avoid leaking current flowing from the battery to the block because the block doesn't have any low power mode (sleep mode). Also they want to avoid a rush current from the battery to the block when the battery is connected to the block.

    Thank you and best regard,
    Kazuya.
  • 0 in reply to Kazuya Nakai59
    TI__Guru* 95911 points
    Hi Kazuya Nakai,

    Thanks for the information.
    Let us know if you face any challenge in evaluation.

    Best Regards,
    Rakesh