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LP5036: LP5036 VLED and LEDs connected in series

Van-Ngoc Nong
Prodigy 150 points
Part Number: LP5036

Tool/software:

Hi,

Can I connect 3 LEDs in series by LP5036? In case yes, what is the maximum of VLED?

Output pin is current sink, so a dropping resistor in series is not neccessary?

My use case is:

 -  total 36 RGB, always 3 RGBs are connected in series

 -  the RGB has Vf = 5V, can I use 24V (VLED) supply voltage?

Best regards

Ngoc

  • 0
    TI__Expert 5610 points

    Hi Ngoc,

    No, the VLED voltage should not exceed 5.5V.

    Yes, the output is under constant current control, so no series resister is required.

    As for the connection, do you mean that 3 Red LEDs are connected in series on one channel, then 3 Green LEDs are connected in series on one channel, then 3 Blue LEDs are connected in series on one channel, then continue 3 Red LEDs...?

    And Vf = 5V is the forward voltage of 1 single LED or the sum of 3 LED in series?

    Best regards,

    Felix