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TPS92682-Q1: Question with Input Power Suddenly drop application in TPS92682 CC dimming output.

Part Number: TPS92682-Q1

Hi team,

    We had a problem with the TPS92682 application:

    I. There is one output configured into CC mode, current output 770MA,(output voltage is about 19V) dimming duty cycle set to 30% . When we drop the input voltage from 12V to 8V, the lamp will flicker frequently, and then report OC error.

   II. If we go from 0 V to 8 V, this lamp will be bright and the peak will not be as high as phenomenon before.

  III. If there is no 30% duty cycle, from 12V to 8V does not appear this phenomenon.

    Here want to confirm whether TPS92682 in the PWM dimming output of the case on the input voltage this sudden sudden drop in the processing is going to be a problem? Or there are other good solutions.