Guest stevenmahoney Posted April 23, 2013 Report Share Posted April 23, 2013 I have a simple schematics with a number of LED drivers. LED strings have a certain number of LEDs that I cannot change. In order for LEDs to operate properly, I have to feed them with 108V and 1.3A current (combined). If I rectify 120V after diode bridge voltage increases to approximately 168V. I have excess of 32 volts (28V drops on LED drivers).I can use a resistor or a capacitor (on AC side) to get rid off excess of 32 volts, but both are bulky (and in case of the resistor hot) solutions.Is there any other smarter way to solve this problem? Any ideas will be appreciated. :-)Steven Quote Link to comment Share on other sites More sharing options...
Muhammad Abu Bakar Posted May 4, 2013 Report Share Posted May 4, 2013 You may use voltage regulator like LM317 as constant current sourse:http://www.electronics-lab.com/blog/?p=620 Quote Link to comment Share on other sites More sharing options...
Guest stevenmahoney Posted May 4, 2013 Report Share Posted May 4, 2013 Thanks, Mohammad! I will take a look at it tonight.Have you had a chance to use it? I just wonder how it will dissipate an excess power. Hope I am not trading one resistor for another. :-)) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.