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LP55231: How to control many LEDs

Kaji@PAN
Mastermind 7260 points
Part Number: LP55231

Hello,

I am considering the configuration in the figure below as a way to control many LEDs.
Connect the Dx pin to the gate of the FET and connect the LED in series to the drain of the FET.
Is such a configuration possible?
Is it possible to use 32.768kHz as the external CLK?

Best regards,

  • +1
    TI__Genius 12915 points

    Hi Kaji,

    Yes the configuration should be OK. When channel off, the gate of NFET is pulled down to GND, so the LEDs are also off. When channel on, the gate is pulled high and LEDs on.

    For the external clock, it is used for the internal engine execution. Do you need to use this function?