TLC59108: Got a pulse on OUT pin when change the brightness register from 0x00 to 0xFF

daniel

Genius 5095 points

Part Number: TLC59108

Hi team,

We series a 10 ohm resister between LED and OUT pin, and measure both side waveform.

We found a pulse when change the brightness register from 0x00 to 0xFF.

The waveform as below. Is it normal? Would this pulse damage LED?

Thanks

over 8 years ago

0 Harry Kennedy1 over 8 years ago

TI__Expert 3460 points

Daniel,

Thanks for the question. This is possible when adjusting the register settings, and is normal behavior. this pulse won't damage the LED since there is no current going through the LED during that pulse.

Power management

Power management forum

TLC59108: Got a pulse on OUT pin when change the brightness register from 0x00 to 0xFF