LP8866S-Q1: Lp8866 PWM dimming accuracy

Hi, Eric

There are several dimming mode for LP8866S. If customer used phase-shift dimming mode, the dimming ratio is the same. For direct PWM dimming mode, the output duty cycle is equal to the input duty cycle, so it is related with the input PWM accuracy.

Hi Zhiqian,

double check, so the phase shift dimming need to be configured with the IIC and the direct PWM only need the hardware PWM pin, is this right?

Hi Eric,

Our expert is currently out of office. He will reply to you next Monday. Thanks for your understanding. 

Best Regards,

Steven

Hi 

Is there any update? How about the current dimming mode?The accuracy is also depending on the input pwm accuracy?

Hi, Eric

Dimming mode is set by the resister.

Hi Zhiqian,

I know this, how about the PWM dimming ratio with the current dimming mode ? is there any accuracy difference among the phase shift mode 、current mode and the direct pwm mode

Hi Eric,

Our expert is currently out of office. He will reply to you later. Thanks for your understanding.

Best Regards,

Steven

Hi, Eric

Pls see my previous answer for the dimming ratio, analog dimming is another topic, we have mentioned it in the datasheet.

If customer used phase-shift dimming mode, the dimming ratio is the same. For direct PWM dimming mode, the output duty cycle is equal to the input duty cycle, so it is related with the input PWM accuracy.