LED Driver and SMPS Difference

Discussion in 'General Electronics Chat' started by shahkrishp, Jan 5, 2013.

  1. shahkrishp

    Thread Starter New Member

    Jan 5, 2013
    Dear Sir,
    Can you explain me what is the difference between LED Driver and normal power supply and SMPS.

    IS LED Driver output is PWM?

    If I use SMPS instead of LED Driver as a constant voltage LED Driver then It should be work or not and if work then what should be future problem occur due to SMPS Supply

    please advise me.
    Last edited by a moderator: Jan 5, 2013
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
    LEDs must not be driven with a voltage source unless you include some series current limiting resistance.
    Switch mode LED drivers are configured as constant current sources, not as voltage sources.
  3. takao21203

    AAC Fanatic!

    Apr 28, 2012
    Professionals can use a voltage controlled power supply.

    It is required to have a good heatsink, to know the LEDs, to measure current + to observe temperature.

    Regular users should only use constant current supplies.

    Nonetheless, you need to cool the LED. If you don't use a fan, you need a fairly large cooler for 30W, 50W etc.

    Commercial lamps should even monitor the fans, and the temperature, to prevent fire, or LED burnout.