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Notes for using Ir-LED with ADP8140 white LED driver

Dear Sir/Madam,

Our customer is studying to use Ir-LED driver with your white LED driver like a ADP8140.

So what is the notes to use as Ir-LED driver?

Only Vf difference?

Why are your LED drivers designed for white LED only?

Thanks Kaos

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  • Hi Kaos,

    Actually, nearly all of ADI's LED drivers can be used to drive any LED.  You can see the list here:

    http://www.analog.com/en/products/power-management/display-and-lighting.html

    The only exception is the ADM8843 and ADM8845, which are intended to drive LEDs with a forward voltage (Vf) between 3 and 4.5V.  Other than that, any of these ICs will work well with IR LEDs.  Often times, our IR LED customers are looking for higher current drives, and if that is the case for you, then I would recommend to start with looking at the ADP8140 and the ADD5211.  The ADP8140 is a 4 channel, high current, feature rich and incredibly flexible LED controller.  It can be used in nearly any topology or application.  The ADD5211 is a multi channel, 800mA (total LED current), high voltage, boost regulator.  Please let me know if you have any questions about these parts.  Or if you would like to do something that you don't see a good solution for. 


    Best Regards,

    Jon Kraft

    jon.kraft@analog.com

Reply
  • Hi Kaos,

    Actually, nearly all of ADI's LED drivers can be used to drive any LED.  You can see the list here:

    http://www.analog.com/en/products/power-management/display-and-lighting.html

    The only exception is the ADM8843 and ADM8845, which are intended to drive LEDs with a forward voltage (Vf) between 3 and 4.5V.  Other than that, any of these ICs will work well with IR LEDs.  Often times, our IR LED customers are looking for higher current drives, and if that is the case for you, then I would recommend to start with looking at the ADP8140 and the ADD5211.  The ADP8140 is a 4 channel, high current, feature rich and incredibly flexible LED controller.  It can be used in nearly any topology or application.  The ADD5211 is a multi channel, 800mA (total LED current), high voltage, boost regulator.  Please let me know if you have any questions about these parts.  Or if you would like to do something that you don't see a good solution for. 


    Best Regards,

    Jon Kraft

    jon.kraft@analog.com

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