5 Replies Latest reply on Sep 24, 2020 6:56 PM by DaFu_4782656

    CYPD3177 FAULT line - Stuck high?

    DaFu_4782656

      Hi,

       

      we've been using the CYPD3177 for a while. Mainly because it allows to set USB-C PD without any FW development.

       

      The FAULT pin on the chip seems to be constantly high, although the chip is correctly providing power to the whole system (15V @1A). We're puzzled by this and haven't been able to find the root cause. We suspect there's somehow a brief OVP event at some point during startup.

       

      We're wondering: case of a brief OVP event, does the FAULT pin get stuck high? Or does it go back to low as soon as the OVP event disappears?

      The datasheet doesn't offer much detail on this.

       

      Thanks.