PARALLELING FIXED REGULATORS (SAFELY)
- Craig Kendrick Sellen
- Posts: 32
- Joined: Thu Jan 25, 2007 1:01 am
- Location: Carbondale Pennsylvania USA
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PARALLELING FIXED REGULATORS (SAFELY)
I NEED TO HAVE 6VDC AT 10 AMPS. I WAS THING OF MAYBE SEVERAL SMALLER IC REGULATORS IN PARALLELING THEM? OR IS THERE A 10 AMP. REG. OUT THERE?
I agree with dyarker. Use a pass transistor such as a pair of 2N3055 paralleled as a common base configuration. Unregulated voltage enters the COLLECTOR. The three terminal regulator gets its input voltage off the unregulated supply. Ground is ground or a "virtual" ground from a voltage divider. Output of the voltage regulator drives the BASE of the transistors. Output of the supply is taken at the EMITTER of the transistors.
Google "2N3055 Regulated Supply" (no quotes) to see some example schematics. There are multiple designs as this is extremely common.
I tried paralleling these three teriminal devices in the past with poor luck. The pass transistor method works best.
If you REALLY need a schematic posted, let us know.
Google "2N3055 Regulated Supply" (no quotes) to see some example schematics. There are multiple designs as this is extremely common.
I tried paralleling these three teriminal devices in the past with poor luck. The pass transistor method works best.
If you REALLY need a schematic posted, let us know.
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- GoingFastTurningLeft
- Posts: 163
- Joined: Wed Sep 06, 2006 7:33 pm
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At least some regulators are parallel capable, See these articals
http://www.edn.com/contents/images/6475014.pdf
http://electronicdesign.com/Articles/In ... cleID=9270
http://www.edn.com/contents/images/6475014.pdf
http://electronicdesign.com/Articles/In ... cleID=9270
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Hi again Hackle,
Ok thanks, i found some pics that seem to help a little.
I was a little disappointed however, in that many of the 'solutions'
were very 'partie' in that they used lots of resistors and perhaps a
few op amps. I was hoping for less parts.
The controller ic they showed was interesting though in that it can
drive low side *and* high side N-MOSFETS it seems.
Ok thanks, i found some pics that seem to help a little.
I was a little disappointed however, in that many of the 'solutions'
were very 'partie' in that they used lots of resistors and perhaps a
few op amps. I was hoping for less parts.
The controller ic they showed was interesting though in that it can
drive low side *and* high side N-MOSFETS it seems.
LEDs vs Bulbs, LEDs are winning.
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