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LP5864: Chip initialisation für 8 bit PWM LED driving

Michael Cerbe
Prodigy 20 points
Part Number: LP5864

Hello, we prepared a LED- illumination board with the LP5864 and 4x 5 RGB- LEDs (4x 15 lines) and want to drive the LEDs via 8bit PWM. We have access to the register area via I2C e.g. read "Dev_initial" = 5Eh.

Can you give me an initialisation setup (control registers) and the address where the 1st LED can be controled via a 8bit PWM value and 20mA ?

many thanks for your support!

 with best regards Michael

  • 0
    TI__Genius 15725 points

    Hi Michael,

    If you want to get 20mA output current, there are a lot of configurations to achieve this and here is one of them:

    1. Set the Maximum_Current to 04h in Dev_config3 Register (0x06)

    2. Set the DC0 Register (0x100) to FFh

    3. Set the pwm_bri0 Register (0x200) to FFh.

    After configuring these 3 registers, then light up the LED dot, I think you can get 20mA output current.

    BR, Jared