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TPS92641: TPS92641 dimmers are zero in simulation

hongwei duan
Intellectual 450 points
Part Number: TPS92641

Hello:

I would like to consult TPS92641. When the analog dimming is zero and the input is 0V at the analog end, the LED has a current of 18mA. When the analog dimming is simulated, the LED cannot be turned off

  • 0
    TI__Mastermind 22745 points

    Hi Sir,

        Please carefully read the datasheet section 7.3.4 for the true-zero current operation, " For true zero application, an external capacitor is required across the LED string to provide a negative current path for the inductor current loop. "

    BR

    Sean