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TPS2553: schematic review

Jimmy WANG
Genius 3265 points
Part Number: TPS2553

Tool/software:

Hi team,

My customer uses TPS2553 as a simple power protection device.

Could you help check the schematic below?

Another question is, can Fault signal control EN shutdown IC when OC occurs? Thanks 

  • 0
    TI__Mastermind 28300 points

    Hi Jimmy,

    1.  If connected as shown, the switch will only provide 75mA of typical current before going into current limit.

    2.  C62 is not functionally necessary and should be removed.

    3.  a 0.1uF capacitor should be added to the IN pin (1)

    4.  It is not necessary to connect the EN pin (3) to /FAULT.  The switch will turn off in fault conditions.  I suggest directly connecting it to the IN pin (1) instead

    Regards,

    Chuck

  • 0 in reply to Chuck Branch
    Genius 3265 points

    Hi team,

    1.  If connected as shown, the switch will only provide 75mA of typical current before going into current limit. 

    A: Yes. Customer just use the device to protect their system. 

    2.  C62 is not functionally necessary and should be removed.

    A==> Got it.

    3.  a 0.1uF capacitor should be added to the IN pin (1)

    A==>Got it.

    4.  It is not necessary to connect the EN pin (3) to /FAULT.  The switch will turn off in fault conditions.  I suggest directly connecting it to the IN pin (1) instead


    A==> But I saw datasheet shown enter current limit during output short.until thermal shutdown then tune off the FET. instead of turning off FET directly when output is short. right?

  • 0 in reply to Jimmy WANG
    Genius 3265 points

    Hi team,

    Any update?