Jump to content
Electronics-Lab.com Community

How to reduce DC a bit without resistor or capacitor? Is there a simple solution


Guest stevenmahoney
 Share

Recommended Posts

Guest stevenmahoney

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

problem.png

post-91880-1427914453703_thumb.png

Link to comment
Share on other sites

  • 2 weeks later...
Guest stevenmahoney

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. :-))

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...