TLC69610: TLC69610 + TLC69614, after adding the diffuser, there is an issue with uneven brightness.

Hi Adams,

Have you ever met this before? I think maybe you need to ask light diffuser vendor.

Also, I would like to check the scan frequency. What's the line frequency here?

BR, Gracie

Hi  Gracie,

I’m new to TI products and still unfamiliar with them, currently testing only with sample code.

I found a #define in system_info.h. Is this what you referred to as the scan frequency?

BR, Adams

Hi Adams,

Are you using 8scan for this board?

BR, Gracie

HI Gracie,

only one TLC69610 and 17 TLC69614.

BR, Adams

Hi Adams,

I notice you use 8scan lines in your code. So if SUB_PWM is 9bit, your scan line freq is 3.66KHZ. And right now your LED board is in low brightness. Could you pls measure the channel voltage(LED-) waveform?

BR, Gracie

Hi Gracie,

The measured waveform is as follows.

Hi 

I want the TLC69614 OUT waveform, not the MOSFET

Gracie

And pls change the scan line to 4 in your screenshot line#25

You are not using 8scan. So you waste half the time

BR, Gracie