LP5523: LED Driver IC only run register with I2c , not with 3 engines

ming you

Prodigy 40 points

Part Number: LP5523

hello ,

i have a lp5523 LED ic , now i config the registers through I2C , not use 3 engines, to light one LED.

LP5523_write_byte(0x00,0x40);
LP5523_write_byte(0x05,0x01);
LP5523_write_byte(0x16,0x10);
LP5523_write_byte(0x26,0x02);

but the LED　not working, i check the i2c communication , it worked well.

so please help check the configuration , perhaps some registrations need to be configured

over 4 years ago

0 Hardy Wu over 4 years ago

TI__Genius 12915 points

Hi Ming,

You could try adding a command to turn on charge pump as below.

LP5523_write_byte(0x00,0x40);
LP5523_write_byte(0x36,0x58);
LP5523_write_byte(0x05,0x01);
LP5523_write_byte(0x16,0x10);
LP5523_write_byte(0x26,0x02);

0 ming you over 4 years ago in reply to Hardy Wu

Prodigy 40 points

Hello Wu

thanks! it works well.

Another question is that :

if i want to pick LED1 ,LED2 as a group to let them lighting at the same times by using master fader function. what should i config the registers. below is my configurations, but it do not work, please help me check it. thanks

LP5523_write_byte(0x00,0x40);

LP5523_write_byte(0x06,0x40);
LP5523_write_byte(0x07,0x40);

LP5523_write_byte(0x36,0x58);
LP5523_write_byte(0x05,0x01);
LP5523_write_byte(0x16,0x10);
LP5523_write_byte(0x26,0x02);

0 Hardy Wu over 4 years ago in reply to ming you

TI__Genius 12915 points

Hi Ming,

After config LED0 and LED1 to Master1, you could use register 48h to control these two LEDs.

0 ming you over 4 years ago in reply to Hardy Wu

Prodigy 40 points

thanks, it works well.

Power management

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LP5523: LED Driver IC only run register with I2c , not with 3 engines