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Original question:

TPS54J061: UV fault behavior

TPS54J061: Fault: auto retry or latch

Naizeng Wang
Expert 5450 points
Part Number: TPS54J061

Tool/software:

Hi team, 

May I know the fault response for all faults? Could you please confirm? 

(1) OCL: I think it is auto retry

(2) UVP: I think it is auto retry

(3) Negative OCL: I think it is auto retry

(4) OVP: I think it is Latch 

(5) OOB: I think it is auto retry

(6) UVLO: I think it is auto retry

(7) TSD: I think it is auto retry

  • 0
    TI__Genius 15117 points

    Hi Naizeng, 

    The responses are stated in the datasheet. 

    (1) OCL:

     

    (2) UVP: 

    (3) Negative OCL: 

    (4) OVP: 

    (5) OOB:

    (6) UVLO: 

    (7) TSD: 

    Best,
    Ryan

  • 0 in reply to Ryan Chen
    TI__Expert 5450 points

    Hi Ryan,

    I know how to read datasheet. Please give your brief confirmation. Thanks! 

  • +1 in reply to Naizeng Wang
    TI__Genius 15117 points

    Hi Nison, 

    (1) OCL: LS FET is on until current is less than OCL 

    (2) UVP: After FB is lower than 80%, there is a delay and then device latches off. The device will try to start up again after the soft start. 

    (3) Negative OCL: When negative OC is greater than -3.5 A, device turns off LS FET and turns on HS FET. After HS FET on time, LS FET turns on again. 

    (4) OVP: After FB is greater than 116% than Vinref, ovp latches off HS FET driver turns on LS FET until it reaches negative OC. Then LS turns off and HS turns on again

    (5) OOB: LS FET turns on to discharge, then gets output voltage to setpoint. 

    (6) UVLO: Non latch, shuts off device when VCC voltage is less than uvlo threshold, once it is higher device turns back on and soft starts

    (7) TSD: Non latch Stops switching and discharges ss. After temp drops 38 C below threshold, device turns back on with soft start. 

    Best,

    Ryan

  • 0 in reply to Ryan Chen
    TI__Expert 5450 points

    Hi Ryan,

    Thanks! It seems that only OVP will latch the device.