LM3648: Connected two LED, how to make the two LED output 500 mA each ?

PYTsai

Genius 10375 points

Part Number: LM3648

we would like to use LM3648 to drive two LED, circuit as below, how to make the two LED output 500 mA each ?

over 4 years ago

0 Charles-Chen over 4 years ago

TI__Genius 11836 points

Hi PYTsai,

What do you mean by 500mA each? Constant current or flash current?

0 PYTsai over 4 years ago in reply to Charles-Chen

TI__Genius 10375 points

Hi Charles,

It is flash current. thanks!

0 Charles-Chen over 4 years ago in reply to PYTsai

TI__Genius 11836 points

Hi PYTsai,

You can try to configure the "LED Flash Brightness" Register.

0 PYTsai over 4 years ago in reply to Charles-Chen

TI__Genius 10375 points

Hi Charles,

May i have your suggestion for how to configure it ?

We need both LED output 500 mA at the same time.

0 Charles-Chen over 4 years ago in reply to PYTsai

TI__Genius 11836 points

Hi PYTsai,

D1 and D3 are the pins of the same output, the current of each pin can not be controlled by register. Only the total current of LED can be controlled by register.

Power management

Power management forum

LM3648: Connected two LED, how to make the two LED output 500 mA each ?