TPS60231: 2ch LED drive

Ryo Akashi

Genius 9470 points

Part Number: TPS60231

Hello experts,

I want to drive 2 parallel LEDs (20mA/ch) like as below;

Totally I need 40mA. In this case, how do I set "ISET"?

How much Rset should set?

Thanks and best regards,

Ryo Akashi

over 6 years ago

0 Sean Zhou over 6 years ago

TI__Mastermind 22745 points

Hi Ryo,

For two parallel two LEDs up to total 40mA, you need to set each channel to 40mA/3 with the "Rset". Rset=600mV*260/(40mA/3)=11.7kohm(EN1 and EN2 connected together to PWM signal).

Regards

Sean

0 Ryo Akashi over 6 years ago in reply to Sean Zhou

TI__Genius 9470 points

Hello Sean,

Thank you very much for your quick support.

I understand.

Thanks and best regards,

Ryo Akashi

Power management

Power management forum

TPS60231: 2ch LED drive