Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Stacked switching supplies for 100V DC

The AM Forum
February 25, 2018, 02:48:45 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
Author Topic: Stacked switching supplies for 100V DC  (Read 931 times)
0 Members and 1 Guest are viewing this topic.

Offline Offline

Posts: 4

« on: November 21, 2017, 11:01:00 PM »

I'm working on a quick 160M transmitter for the holidays. Not wanting to go the route of a linear supply with heavy iron, I stacked two Meanwell LRS-350-48 supplies in series. Each supply is a 48VDC (+/- 10%) 350W switcher, with an inferred sufficient isolation voltage at the output. (Since MW USA never answered my emails.)

Today I did a quick load test of that stackup to make sure there were no hidden gremlins. The two supplies were adjusted up to 50V and have 60A rectifier diodes across their outputs for safety and being able to run a single supply for low power.

So far I am satisfied with the performance. Not bad for $34 a supply.

It's MUCH lighter and will offer better load regulation over a linear.

* 20171121_131710.jpg (2872.8 KB, 4032x2268 - viewed 122 times.)

* 20171121_151732.jpg (2671.27 KB, 4032x2268 - viewed 105 times.)

Offline Offline

Posts: 234

« Reply #1 on: November 22, 2017, 07:45:51 AM »

It looks as if you're on the right track.  W6QPL has a discussion of multiple switching supplies on his website.

Pages: [1]   Go Up
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.043 seconds with 18 queries.