Dimmable led drivers?

Discussion in 'LEDs and Optoelectronics' started by primuspaul, Feb 13, 2018.

  1. primuspaul

    primuspaul

    Joined:
    Feb 7, 2018
    Messages:
    28
    Likes Received:
    0
    primuspaul, Feb 13, 2018
    #1
    1. Advertisements

  2. primuspaul

    Harald Kapp Moderator Moderator

    Joined:
    Nov 17, 2011
    Messages:
    7,943
    Likes Received:
    1,447
    Location:
    Germany-Europe-Earth-Sol System-Milky Way-Laniakea
    This kind of dimmable LED driver is meant to be used with a classic dimmer/switch combo used to control brightness of lamps. The featiure "dimmable" needs to be mentioned since not every LED driver will work with this kind of dimmer.
    For setting the brightness on the low voltage side via potentiometer or similar typically a technique called PWM is used. You can buy off the shelf modules for that purpose.
     
    Harald Kapp, Feb 13, 2018
    #2
    1. Advertisements

  3. primuspaul

    primuspaul

    Joined:
    Feb 7, 2018
    Messages:
    28
    Likes Received:
    0
    What if I want to use the dimming module to permanently dim the LED? Do I need a resistor on live 120VAC wire? Is there a cheap way to do it without generating waste heat?
     
    Last edited: Feb 14, 2018
    primuspaul, Feb 14, 2018
    #3
  4. primuspaul

    Bluejets

    Joined:
    Oct 5, 2014
    Messages:
    2,235
    Likes Received:
    445
    Phase control dimming waste heat would be hardly detectable.
     
    Bluejets, Feb 14, 2018
    #4
  5. primuspaul

    Harald Kapp Moderator Moderator

    Joined:
    Nov 17, 2011
    Messages:
    7,943
    Likes Received:
    1,447
    Location:
    Germany-Europe-Earth-Sol System-Milky Way-Laniakea
    A resistor is a cheap way to generate as much waste heat as possible.
    Use one of the PWM modules I linked.
     
    Harald Kapp, Feb 14, 2018
    #5
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.