LP8866S-Q1: LP8866S Questions

Hi, Eric

Dimming ratio means the Maximum brightness : Minimum brightness.

For PWM dimming, maximum brightness is the T(related with the frequency), the minimum brightness is the minimum on time.

For analog dimming, maximum brightness is the 100%, minimum brightness is the 1/2^12.

Hi Zhiqian，

For Q1, 12 bit analog dimming，the min brightness is  1/2^12. 

For Q2，Do we have a formula for the Max brightness related to the T. how to calculate it？

Hi, Eric

For max brightness, T is related with the dimming frequency, you can calculate as 1/f.

Hi Zhiqian,

thanks, I know this , we want to know the follow table. is there any formula for the below table. can you pls help to explain why the dimming ratio resolution are both the 16bit for 152HZ and 305HZ?  and for 16bit , why the resolution is not 2^16-1 instead of the 32000?

Hi, Eric

As aligned in the phone, the Dimming ratio is ratio between max brightness and min brightness. The resolution is the minimum step of the brightness.