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Designing Or buying a 150A, 0.5V to 4.5V Power supply

N

Naveed

Jan 1, 1970
0
Anybody has any experience designing (or buying) very high current low
voltage power supplies. There are many dc-dc converters available,
but they are not programmable for the full range. So I am now
thinking of designing my own.

Here's the requirement:

Voltage In: preferably 48V dc
Voltage Out = 0.5V to 4.5V (Programmable through DAC)
Current: 150A
Features Desired: Current sharing, Very High Frequency (to save on
capacitors), Very fast transients, Power on/off,

I would appreciate any help here.

Thanks
 
R

Robert C Monsen

Jan 1, 1970
0
Naveed said:
Anybody has any experience designing (or buying) very high current low
voltage power supplies. There are many dc-dc converters available,
but they are not programmable for the full range. So I am now
thinking of designing my own.

Here's the requirement:

Voltage In: preferably 48V dc
Voltage Out = 0.5V to 4.5V (Programmable through DAC)
Current: 150A
Features Desired: Current sharing, Very High Frequency (to save on
capacitors), Very fast transients, Power on/off,

I would appreciate any help here.

Thanks

That's one heck of a toaster you are building. Here is a paper you might be
interested in

http://www.iop.org/EJ/abstract/0022-3735/17/8/006

I haven't read it (its $30 to look at) but it sounds like it might apply.

Regards,
Bob Monsen
 
F

Fred Bartoli

Jan 1, 1970
0
Naveed said:
Anybody has any experience designing (or buying) very high current low
voltage power supplies. There are many dc-dc converters available,
but they are not programmable for the full range. So I am now
thinking of designing my own.

Here's the requirement:

Voltage In: preferably 48V dc
Voltage Out = 0.5V to 4.5V (Programmable through DAC)
Current: 150A
Features Desired: Current sharing, Very High Frequency (to save on
capacitors), Very fast transients, Power on/off,

I would appreciate any help here.

Thanks

Hi,

I've designed one about 3 years ago that did exactly that, and a bit more.
That was part of an ATE tester. From some aspects of your specs I guess your
app is similar.
You won't find anything like that readymade, except buying the whole tester.
Be prepared for the 100s $K though.

Fred.
 
T

Thomas C. Sefranek

Jan 1, 1970
0
Naveed said:
Anybody has any experience designing (or buying) very high current low
voltage power supplies. There are many dc-dc converters available,
but they are not programmable for the full range. So I am now
thinking of designing my own.

Here's the requirement:

Voltage In: preferably 48V dc
Voltage Out = 0.5V to 4.5V (Programmable through DAC)
Current: 150A
Features Desired: Current sharing, Very High Frequency (to save on
capacitors), Very fast transients, Power on/off,

I would appreciate any help here.

Thanks

I'd look into VICOR, but it will be a killobuck.


--
*
| __O Thomas C. Sefranek [email protected]
|_-\<,_ Amateur Radio Operator: WA1RHP
(*)/ (*) Bicycle mobile on 145.41, 448.625 MHz

http://hamradio.cmcorp.com/inventory/Inventory.html
http://www.harvardrepeater.org
 
C

CFoley1064

Jan 1, 1970
0
From: [email protected] (Naveed)
Date: 1/15/04 5:35 PM Central Standard Time
Anybody has any experience designing (or buying) very high current low
voltage power supplies. There are many dc-dc converters available,
but they are not programmable for the full range. So I am now
thinking of designing my own.

Here's the requirement:

Voltage In: preferably 48V dc
Voltage Out = 0.5V to 4.5V (Programmable through DAC)
Current: 150A
Features Desired: Current sharing, Very High Frequency (to save on
capacitors), Very fast transients, Power on/off,

I would appreciate any help here.

Thanks

Hi, Naveed. Actually, with the exception of the requirement of 48VDC input
power, I'd suggest that the Kepco ATE 6-100 would fit your requirement exactly.
It's externally programmable with an input voltage, and has current sharing
capability and remote on/off. It can be used in the high-power operational
amplifier mode, and has full power bandwidth into the mid-audio frequencies.

Ah, but that 48VDC requirement. May I suggest using a telecom-quality inverter
to get 120VAC from the 48VDC power bus, and then use that to drive the Kepco.
You can get inverters capable of 5KVA off the shelf. That will complete a
rather large (full rack width, 10U or so) but relatively inexpensive solution.
Not only that, but since everything's off-the-shelf, you can walk away from it
when you're done.

I've used numerous Kepco programmable power supplies for different
applications, but have never powered them from an inverter. You might want to
check with the Kepco and inverter manufacturer apps engineers before cutting
the P.O.s. to avoid any surprises.

Good luck, and good hunting, sir.
Chris
 
P

Peter Bennett

Jan 1, 1970
0
Anybody has any experience designing (or buying) very high current low
voltage power supplies. There are many dc-dc converters available,
but they are not programmable for the full range. So I am now
thinking of designing my own.

Here's the requirement:

Voltage In: preferably 48V dc
Voltage Out = 0.5V to 4.5V (Programmable through DAC)
Current: 150A
Features Desired: Current sharing, Very High Frequency (to save on
capacitors), Very fast transients, Power on/off,

I would appreciate any help here.

Thanks


We've used Power-ten
(http://www.elgar.com/products/PowerTen/index.htm)
high current, low voltage supplies - but they are 120 or 208VAC input.
 
N

Naveed

Jan 1, 1970
0
Thankyou everybody,

I appreciate so many people answering this.

I have been seriously looking into Vicor, (as somebody suggested).
Looks like their solutions are not as expensive as I thought.

This power supply needs to go on to a PCB, so it can't be too large or
bulky.

Thanks again for your answers.
 
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