Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Power Supplies and Power Supply Design
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 11-20-2018, 04:13 AM   #1
Y. Signal
Member
 
Y. Signal's Avatar
 
Join Date: Apr 2018
City & State: South Spain
My Country: Spain
Line Voltage: 230VAC 50Hz
I'm a: Knowledge Seeker
Posts: 60
Question Looking for a reliable +5V and +12V PSU with low ripple

Hello. I'd like to get suggestions for a reliable PSU with good caps and low ripple with +5V (adjustable), +12V and optionally -5V. I don't really need the -5V but it would be nice to have this output too.

I've read good things about the Meanwell MWP-606A with 50mV ripple for the +5V output (the most important for my application) so I've called to an official distributor. Sadly this PSU is not produced anymore and the replacement they suggest me (TP-100A) has 100mV ripple noise, more than the 80mV of the RT-125A I'm currently using.

Apart from this second PSU I plan to buy, I'd like to get cleaner outputs from my actual RT-125A, is using a line filter the way to go? if so, could you recommend me one or point me on what I should look for? my application (arcade boards) typically uses 2 to 5A, and the efficiency of this PSU is 80% if I recall correctly.

I live in Europe, so being able to buy it from here is a big plus since import taxes are very high.

Thank you in advance.
Y. Signal is offline   Reply With Quote
Old 11-20-2018, 10:16 AM   #2
sam_sam_sam
Badcaps Veteran
 
Join Date: Jul 2011
City & State: Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
I'm a: Knowledge Seeker
Posts: 1,382
Default Re: Looking for a reliable +5V and +12V PSU with low ripple

I hope you find thi usage

http://pdf.eepw.com.cn/m20091019/5c3...86b334dcf8.pdf
__________________
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Desk Top Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *


These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

1 Over Head Crane Current Sensing Board
2 Hem Saw Computer Stack Board

All of these had CAPs POOF
All of the mosfet that are taken out by bad caps
sam_sam_sam is offline   Reply With Quote
Old 11-20-2018, 09:17 PM   #3
budm
Badcaps Veteran
 
budm's Avatar
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 35,392
Default Re: Looking for a reliable +5V and +12V PSU with low ripple

What effect does the 100mV have on the arcade board?
__________________
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
budm is offline   Reply With Quote
Old 11-21-2018, 01:42 AM   #4
Y. Signal
Member
 
Y. Signal's Avatar
 
Join Date: Apr 2018
City & State: South Spain
My Country: Spain
Line Voltage: 230VAC 50Hz
I'm a: Knowledge Seeker
Posts: 60
Default Re: Looking for a reliable +5V and +12V PSU with low ripple

Hi, I want to reduce ripple and noise to prolong the life of the arcade boards since they are very old. With some boards that are not so well built in some analog TVs I have observed some wavy noise across the screen, not sure if that's due to the RT-125A.

Would a line filter help with this? could you recommend me one, or what features or certifications should I look for?

Last edited by Y. Signal; 11-21-2018 at 02:08 AM..
Y. Signal is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 02:04 AM.
Did you find this forum helpful?