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LP5012EVM: LED Sink Current never goes above 20mA

Chris Kang1
Prodigy 40 points
Part Number: LP5012EVM
Other Parts Discussed in Thread: LP5012

Even I set the registers as below, the LED sink current stays @ 20mA and never goes up to 35mA.

40 1E 0F FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 

I supplied 3.6V for VIN_EXT.

  • 0
    TI__Genius 12915 points

    Hi Chris,

    Max output current was set by external resistor RIREF (R4 on EVM). You can find detail information in LP5012 datasheet section 8.3.3. Default value is 3.57k so it can only get 20.5mA. You can replace it to a smaller resistor to get larger output current range.