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TPS92630-Q1: TPS92630 PWM Pin Parameters

li darren
Intellectual 520 points
Part Number: TPS92630-Q1

Hi,

I will used TPS92630 in 50mA LED driver by PWM dimming project.  But I can not understand PWM pin description in datasheet as picture,  is it the Pin input range? Could you explain to me, thanks?

By the way, how about TPS92630 PWM dimming level? I can not find it in datasheet.

  • 0
    TI__Expert 5475 points
    Hi Darren,

    VIH(PWMx) means the PWM pin input voltage at which the channel is turned on when PWM voltage is rising.
    VIL(PWMx) means the PWM pin input voltage at which the channel is turned off when PWM voltage is falling.
    What do you mean by PWM dimming level? Do you mean dimming ratio?

    Best Regards,
    Shirley He
  • 0 in reply to Shirley He
    Intellectual 520 points

    Tanks for your reply. 

    when PWM input < VIL, the channel is turned off, 

    when PWM input > VIN, the channel is turned on.

    VIL is  close to VIN,  how to reject ripple? 



    What do you mean by PWM dimming level? Do you mean dimming ratio?

    Yes, how many is TPS92630 dimming ratio?

  • 0 in reply to li darren
    TI__Expert 5475 points
    Hi Darren,

    Sorry I just noticed there is a mistake in the datasheet regarding PWM threshold. The data of VIH and VIL is reversed. We will revise that in the next version. Thanks for pointing it out.
    Dimming level of TPS92630-Q1 is about 9-bit resolution. How much dimming ratio do you need? We have devices with higher dimming ratio.

    Best Regards,
    Shirley He
  • 0 in reply to Shirley He
    Intellectual 520 points
    Hi Shirley,

    Tanks. 9 bit resolution meet my requirements.