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TLC5941-Q1: GS values and DC values

Li Chen92
Expert 3040 points
Part Number: TLC5941-Q1

Hi TI expert

we are developing an application where we want to vary the intensity of LEDs using tlc5941-q1, we are using the Imax current as 30ma.we are loading DC values as 63 since we want to drive complete 30ma current for each output channel and we trying to vary the GS values to make a change in intensity levels. when we are trying to load GS values greater than 500 we are not able to see any intensity change but if we vary GS values within 500 we can see the intensity variation.
What is the reason for not observing intensity change when the GS values are above 500, since we can load the GS values upto 4095.

 

Best regards,

Thomas

 

 

  • 0
    TI__Genius 12915 points

    Hi Thomas,

    It is weird that GS control is effective under 500 but out of controlled in high value. Could you help to set 3 channel in different value (like 100, 500, 4000) and capture the waveform of them together with GSCLK?