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Old 1st July 2006, 01:01 AM   #1
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Default Vince's GC RPS

I was pondering the idea of being able to make a regulated power supply with high amperage (about 8 to 12 amps), and at 24 volts WITHOUT using a single "Adjustable" regulator. Only preset regulators.

I have done it. I have made a new kind of regulator:


BEHOLD the all new 8x7824 and 8x7924 voltage regulator.

Eagle screen shot below:
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Old 1st July 2006, 01:05 AM   #2
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For those of you who have Eagle, here is the file no hassle!
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Old 1st July 2006, 01:58 AM   #3
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Default parallel voltage regulators

If you have not built this yet be carefull, the error voltage correction can be as high as 1.5% on adjustable or fixed regulators even with load shareing resistors that difference will cycle the regulators to full current then thermal shutdown and then repeat the cycle one after another, you will never see any current gain.
Try useing an adjustable with an op amp comparator to sync the regs.
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Old 1st July 2006, 02:32 AM   #4
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An op amp comparator? I know that the regulators must be synced up, but on the national website, they said it was okay to put regulators in parallel as long as you put a very low ohm resistor on the output of each of the regulators. Is that enough to say this is a good idea; or is it a big...... ?
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Old 1st July 2006, 03:52 AM   #5
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Default parallel voltage regulators

A tidbit wright from National..........
http://www.national.com/an/LB/LB-51.pdf#page=1
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Old 1st July 2006, 04:01 AM   #6
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No more of my idea I guess LM338 and LM301A are in! LM78XX and LM79XX are OUT
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Old 1st July 2006, 04:13 PM   #7
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About a week ago, i "cooked up" a pair of high-current adjustable v-regs, using 5 paralelled LM317's and 5 LM337's, on separate pcb's, with summing resistors on each chip's output. I can attach the pcb's if anyone's interested...
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Old 1st July 2006, 04:26 PM   #8
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Yes please!

Could we also have some Eagle Files? That would be great!
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Old 1st July 2006, 04:42 PM   #9
Khron is offline Khron  Romania
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These have only been drawn up in Eagle, no actual boards etched / populated yet

Positive regulator, 11A / 16A (typical / max)
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Old 1st July 2006, 04:43 PM   #10
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Negative regulator, 11A / 16A (typical / max)
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