TPS61166: LED current programming

Jim Huang28

Part Number: TPS61166

Hi Sir:

The FB voltage is 0.2-V , LED current was programmed by R1 resistor. What will happened when I set the current is 120 mA and use PWM 100 % but the panel BL module only accepts maximum current is 50 mA ? Does it damage the panel BL module ??

over 4 years ago

0 Yuting Shao over 4 years ago

TI__Genius 13001 points

Hi Jim,

It's recommended that LED driver output current should be lower than the panel BL module maximum current.

BR,

Robin

0 Jim Huang28 over 4 years ago in reply to Yuting Shao

Prodigy 20 points

Hi Robin:

I have several panels but I don't want to have different skus bom. I want to use SW PWM to control it. for example R1 decide maximum 120 mA but I use PWM to handle the current output from TPS61166 ??

0 Yuting Shao over 4 years ago in reply to Jim Huang28

TI__Genius 13001 points

Hi,

TPS61166 only supports PWM dimming, so the output current is 0 or 120mA. According to your previous description, it's dangerous. So I suggest you choose other analog dimming device with PWM input.

BR,

Robin

Power management

Power management forum

TPS61166: LED current programming