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LP8556: PWM Control in Adaptive Output Dimming

K.Yaita
Guru 29690 points
Part Number: LP8556

Hi Team,

Does PWM duty decrease / increase in a linear manner in the range of following red part?
I believe it but would like to confirm just in case.


Best Regards,
Yaita / Japan disty

  • 0
    TI__Expert 4565 points

    Yes, your understanding is correct. PWM duty is linear, and actual duty ratio will be brightness(%)*1/(% of switch point of hybrid dimming). For example, if 25% is switch point, PWM duty ratio at 25% or lower brightness setting will be 4x of brightness setting due to reduced current by hybrid dimming.

    Hope this helps,