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Original question:

LP5861: Dynamically controlling individual LEDs

LP5861: CS Pin cannot be controlled and LED cannot be lighted

Matt Qi
Intellectual 2520 points
Part Number: LP5861

Hi team,

My customer faced a problem during using our LP5861. They found that they cannot control the CS pins.

The schematic is attached, and first you can help review the schematic, whether it has any problems.

LP5861 Schematic.pdf

Second, I want to tell you the programming logic process and control process:

1. Write 0x01 to Address 000 to enable the chip, write 0x58 to address 001 to enter mode1. (The request is to light up the LED, no PWM need)

2. Read back the address 000 and 001, to ensure the writing successfully.

3. Write different current value to address 100, and read back the address 100, which is following, and there is no LED lighting.

Please help debugging this issue, and looking forward to your reply.

Best Regards,

Matt.