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TLC6C5912-Q1 PWM dimming ratio

Takao Yamamoto
Genius 4135 points
Other Parts Discussed in Thread: TLC6C5912-Q1

Dear all,

You said 'Output enable pin can be used for global PWM dimming' at paragraph 8.3.5 of data sheet page 11.

Could you teach me how rate is the dimming ratio?

Best regards,

  • 0
    Genius 4135 points
    Dear all,

    I would like to know how.
    I am looking forward hearing from you.

    Best regards,
  • 0 in reply to Takao Yamamoto
    TI__Expert 5380 points

    Hi Yamamoto,

    Sorry for the late reply, as we are just back from chinese new year holiday. 

    As you can find in the TLC6C5912-Q1 datasheet, the propagation delay of the G pin is 210ns and 75ns. 

    so there will be 135ns change on the PWM on time. To minimize this effect, it is better to set a large PWM on time for example 1.35us PWM on time. 

    By the way, may I know what is the PWM frequency and dimming ratio requirements from customer?

  • 0 in reply to Anda Zhang
    Genius 4135 points
    Dear Anda Zhang,

    Thank you for your reply.
    I have not gotten customer requirements yet.

    I posted this because I would like to make sure how quickly this device can control dimming ratio.
    Through this post, I would like to answer my customer when I receive this same question.

    I am sorry I can not give you the customer requirements.
    Best regards,