H Bridge to drive EL panel

Discussion in 'Analog & Mixed-Signal Design' started by Green-0424, Aug 23, 2016.

  1. Green-0424

    Thread Starter New Member

    May 2, 2016
    Hi all,
    Just wondering if a H-Bridge could be used to drive an EL Panel? The panel is about 36" square and the EL circuits I have tried don't seem to be able to drive a panel that big. I was thinking that a H-Bridge could provide a good A/C voltage from a DC voltage source. Not sure if it is possible, any help would be appreciated.
  2. RichardO

    Well-Known Member

    May 4, 2013
    All the small EL panels I have seen need about 100 volts (RMS, I think) to work. The easiest way I can think of is to use a high current H-bridge driving a step-up transformer. Fortunately, EL panels work at 60Hz so a common power transformer should work.
  3. DickCappels


    Aug 21, 2008
    An H Bridge would be a good choice. Just be aware that using power transformers "backwards" is fraught with hazards and it is difficult to get very good efficiency that way. I think this is mainly because of and IR drop in the low voltage primary -the resistance of the low voltage winding times the magnetizing current in that winding, which can be huge. I did something similar recently and went through a lot of different transformers before I achieved success.
  4. wayneh


    Sep 9, 2010
    I've spent some time designing a DIY inverter for EL tape, but haven't made it to the build yet. Just need a few rainy days.

    If you care to have a look, see the thread containing this post, as well as my thread on the topic.