Dc-Dc converter

Adam

Take a look at

Brian

Why wouldn't you just use a solid state voltage regulator IC. They are ready to go right off the shelf. Something like an NTE-933 will regulate up to 5amps and if you didn't want to parallel two of these you should be able to boost the current using power transistors of the proper size. If you were going to do that you might start with an NTE-1954 (a 1 amp regulator and cheaper) as your reference regulator and boost that with power transistors. The whole point is to avoid the complexity and losses of a DC to DC conversion process. Keep it simple.

In message , dated Sat, 12 Aug 2006, snipped-for-privacy@gmail.com writes

How very magenta. (;-) 240 precious watts wasted. The Earth will become a cinder overnight! (;-)

--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

Because it may be homework. There are suitable circuits in app notes easily find-able through google at all the usual suspects web sites, but the professors know all those canned circuits ;)

If the OP is a little more forthcoming on more details (required transient response, load variations etc.) [s]he may get more help

Cheers

PeteS

If you use a simple series regulator, you throw away 120W. Adding some complexity could save some of that power.

-- john

Getting rid of 24W isn't all that simple. The NTE933 is a linear regulator.

Simple switching regulators avoid that particular problem.

--
Bill Sloman

Be your age. Getting rid of 120W without driving a linear regulator into thermal overload protection is hard work and requires a big heatsink with a low thermal resistance to ambient, which usually means fan-blown.

It isn't the earth that turns into a cinder overnight, but the project costs.

--
Bill Sloman, Nijmegen

Why? It's dull being 68 and a bit. I'd rather be my shoe-size (British size, preferably, but I'll settle for Continental).

Indeed. I abjectly apologise for writing 240 W in error.

You haven't understood a bit, have you? What do you think is the significance of that odd word 'magenta' in this context? Followed by a ridiculously exaggerated comment about global warming?

--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

I've managed to write 24W at another point in the is thread, which was just as abjectly in error - senior moments seem to start at 63 (possibly earlier).

Haven't a clue - a google search on "magenta" and another on "magenta+global+warming" didn't help either. Do tell ...

--
Bill Sloman, Nijmegen

In message , dated Sun, 13 Aug 2006, snipped-for-privacy@ieee.org writes

Magenta is the complementary colour of green - as near to an 'opposite' as you can get in the context.

I think we should form an International Magenta Party, to combat the worst excesses of the green movement. You know, opposing the restoration of a landfill refuse site because it would displace the seagulls [1].

Members would be required to eat five portions a day of magenta food, with some tolerance on what is 'magenta'. Examples are: red cabbage, aubergines (eggplants), lollo rosso, beetroot, red grapes, purple peppers (rare but they do exist), boysenberries....

[1] Far more serious is the proposal from a group of British MPs to raise the car tax on cars with a fuel consumption that they consider 'high' to £1800 a year, and even family cars would attract £1500 tax. Considering what that would do to the values of the cars, it amounts to summary confiscation of assets. Stalin would be proud! Both of John Prescott's Jaguars would, of course be exempt, as they are 'essential'.

--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

I can follow the logic.

If you want my opinion of the worst excesses of the green movement, it is their tendency to over-state and over-simplify their case. I've pretty much lost patience with the Dutch branch of Greenpeace - listening to them is like being exposed to a non-stop TV commercial, a continuous stream of emotionally loaded non sequiteurs. Worse, my wife still gives them money ...

Once the rent-a-crowd fanatics latch onto a cause, no matter how worthy, principle goes out the window. Fundamentalist Christians and fundamentalist muslims provide endless examples - one of the stronger arguments against the existence of god is his failure to spend a few lightning bolts on the likes of Ian Paisley and Osama bin Laden.

--
Bill Sloman, Nijmegen

schreef in bericht news: snipped-for-privacy@75g2000cwc.googlegroups.com...

Aren't you forgetting someone?

--
Thanks, Frank.
(remove \'q\' and \'.invalid\' when replying by email)

Hahah!!!- lemme guess....

In message , dated Sun, 13 Aug 2006, snipped-for-privacy@ieee.org writes

Beat her.

At Scrabble, of course.

I entirely agree with you. That must be a nice change, seeing how almost all of your posts are received. (;-)

--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

In message , dated Sun, 13 Aug 2006, Frank Bemelman writes

Phat Thingy? No, I don't support the summary execution of imbeciles.

--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

ROTFLMAO!

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.

So at what IQ can you perform summary execution?

martin

In message , dated Sun, 13 Aug 2006, martin griffith writes

What's yours? (;-)

-- OOO - Own Opinions Only. Try

and

2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK