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LM5155-Q1: OVP protection delay time confirmation

Songzhen Guo
Intellectual 2770 points
Part Number: LM5155-Q1

Hi Experts.

Could you share the OVP delay time of LM5155-Q1? When I read the datasheet of LM5155-Q1, I just find the work model for OVP. 

If the voltage at the FB pin rises above the overvoltage threshold (VOVTH), OVP is triggered and switching stops. During OVP, the internal error amplifier is operational, but the maximum source and sink capability is decreased to 40 µA.

Does it mean the delay time of OVP is the propagation time of this smith trigger? Could you check it for me? Thanks.

Best Regards

Songzhen Guo

  • 0
    TI__Genius 11215 points

    Hello, 

    Thanks for reaching out. The delay is the internal circuit delay, which can be estimated being less than 100ns as the FB is checked in real time. Let me know if you need further help. 

    Kind regards,
    EM