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Old 19th November 2001, 10:38 PM   #11
AudioFreak is offline AudioFreak  Australia
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Location: Queensland, Australia
100A ..... lol....... someones been taking you for a ride

for 300W +/-50V @ 20-25A will be fine........

that post you made yesterday was the 1st one where you said 300W ..... before that, you were saying 1kW which is why the current was no where even close.

good luck.

[Edited by AudioFreak on 11-19-2001 at 05:58 PM]
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Old 22nd November 2001, 07:06 PM   #12
HaaiFaai is offline HaaiFaai
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Default switching power supply, see Velleman


You might try the link of Velleman.


They have a switching power supply for car amplifiers in their program.
(It's also in English)

Good luck
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Old 23rd November 2001, 12:56 AM   #13
blmn is offline blmn  Brazil
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SMPS power supplies are a little bit harder to develop but they are a very good way to improve your electronic skills. I used to design my own car power amps using basically these three books as references:

- Switching power supply design - Pressman -ISBN 0-07-052236-7
- switchmode power supply handbook - Billings - 0-07-005330-8
- designing magnetic components for high frequency dc-dc converters - McLyman - 1-883107-00-8.

I reached 2x400W continuous at 2ohms loads using regulated push pull designs.

I suggest you start with basic designs like one in Audio Amateur Power Amp Designs (ISBN 1-882580-08-7)to deal with the basic pratical matters, and, after that, make your own design to achieve more power.

The PCB layout and correct transformer design are VERY important.


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Old 23rd November 2001, 04:22 PM   #14
HaaiFaai is offline HaaiFaai
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Join Date: Nov 2001
Default Found the link on switching psu car amp

Not sure if it will help you:


A diy power supply rated up to 300 Watts.

Otherwise look at this website:

http://www.epanorama.net under circuits to build.

good luck

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