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TPS24750 / Reverse current

ACGUY
Guru 11170 points
Other Parts Discussed in Thread: TPS24750, CSD17553Q5A

Hi,

Please let me know about TPS24750.
During normal operation, if VIN is short-circuit, output voltage is higher than VIN.How much the reverse current to allowable of body diode?

Regards,
Nagai

  • 0
    TI__Genius 12621 points
    Hi Nagai,

    All eFuse questions now belong under the "Load Switches" forum. I will move this thread accordingly so the appropriate team can assist you.

    Thanks!
    Alex
  • 0 in reply to Alex Triano
    TI__Intellectual 865 points

    Hi Nagai-san,

    For the reverse current blocking feature you can implement the design with an external N-FET as shown in Figure 46 in the datasheet. When Input supply get short circuited, the reverse current from output side will get blocked with this implementation. However there will be a transient reverse current through the FETs. Please select a logic gate level external FET with VGSth < 1.5V for the design (example: CSD17553Q5A). This will help to reduce the transient time for the reverse current through the body diode of the internal FET.

    The internal FET can handle 20 A of transient current.

    Regards,

    Dilip

  • 0 in reply to Dilip Jain
    TI__Intellectual 865 points
    Hi Nagai-san,
    The *body diode* of the internal FET can handle 20 A of transient current.