Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Power supply design from High Input DC voltage....

Status
Not open for further replies.

malli_1729

Full Member level 5
Joined
Feb 13, 2007
Messages
242
Helped
46
Reputation
92
Reaction score
45
Trophy points
1,308
Location
INDIA
Activity points
3,050
Power supply design....

Hi!

we have a project, for which we are designing Power supply.
Thing is
Input: 50 to 85V DC with Vin_nominal =72V DC
output1 = 12V@3A
Output2 = +/-24@1A

I have checked most of the manufacturers sites like TI,Linear tech,National semiconductors,Maxim-ic and other companies.

most of the companies are not supporting this much input voltge...mostly all are going upto max Vin = 72V .....
can u help in suggesting a way to me......
if it was a module also no problem.....
any method to reduce the Input voltage to around 50V without losing much power....

regrds
 

malli_1729

Full Member level 5
Joined
Feb 13, 2007
Messages
242
Helped
46
Reputation
92
Reaction score
45
Trophy points
1,308
Location
INDIA
Activity points
3,050
Re: Power supply design....

Thnx for the reply....

we need max input voltage upto 85V......


Thanks once again....

ours is a test equipment, these suplies will take lot of space...that too we can generate only one of the voltages 12 or 24 or -24 by using these modules...
so, we have to use 3 modules ...which is not practical......

from Powerone and wallindustries we have selected some of the modules, But same problem persists as we need to use saparate for each supply......

is there any remedy...like we can generate atleast +/-24 with one module and 12V with another one....

thanking you,
 

pinoy

Member level 1
Joined
May 25, 2007
Messages
40
Helped
2
Reputation
4
Reaction score
0
Trophy points
1,286
Activity points
1,508
Power supply design....

Your input voltage requirements seems high.
One option is to use a transformer to stepdown the input voltage and regulate it afterwards.
 

karesz

Advanced Member level 5
Joined
Apr 13, 2008
Messages
2,332
Helped
327
Reputation
654
Reaction score
52
Trophy points
1,328
Location
EU
Activity points
14,632
Power supply design....

Hi Malli,
Maybe you have to select some synchronizable versions, than I believe too zhat their are in one modul or system to realize...
Eventually you can apply 3 individual modules, but with Power sequencer/"hot plug-in Switcher" for "at one time" get it on/off circuits.
K.
 

niks

Full Member level 3
Joined
Mar 18, 2002
Messages
189
Helped
2
Reputation
4
Reaction score
0
Trophy points
1,296
Activity points
1,385
Re: Power supply design....

Please try power modules from Murata, Powerone. They are reliable and may b as per your requirement
 

frankliner

Member level 5
Joined
Sep 9, 2009
Messages
82
Helped
12
Reputation
24
Reaction score
8
Trophy points
1,288
Activity points
1,679
Power supply design....

If you use a topology like flyback, sepic, or CUK you could add a voltage limiter to the IC supply.

This way the output voltage is limited only by external components not the control IC.
 

malli_1729

Full Member level 5
Joined
Feb 13, 2007
Messages
242
Helped
46
Reputation
92
Reaction score
45
Trophy points
1,308
Location
INDIA
Activity points
3,050
Re: Power supply design....

from powerone i have selected some modules....

i got a module for 12V@2A ..but for +/-24V@0.5A no module........

i don't know murata has power modules...i will see and get back to u...

thanks for the reply..
 

karesz

Advanced Member level 5
Joined
Apr 13, 2008
Messages
2,332
Helped
327
Reputation
654
Reaction score
52
Trophy points
1,328
Location
EU
Activity points
14,632

malli_1729

Full Member level 5
Joined
Feb 13, 2007
Messages
242
Helped
46
Reputation
92
Reaction score
45
Trophy points
1,308
Location
INDIA
Activity points
3,050
Re: Power supply design....

thank u once again....

i will see and come back
 

karesz

Advanced Member level 5
Joined
Apr 13, 2008
Messages
2,332
Helped
327
Reputation
654
Reaction score
52
Trophy points
1,328
Location
EU
Activity points
14,632
Hi malli,
I read yet an article over following Switcher, what maybe helps for you: 80-V DC/DC converter targets boost, flyback, SEPIC and inverting power supplies, has an On-Board 84 V/3.5 A Power Switch, The1000-piece price starts at 3.05 US Dollars each.... LT3898
K.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search


Welcome to EDABoard.com

Sponsor

Sponsor

Design Fast


×
Top