Vince's GC RPS

DJ Exprice · 1st July 2006, 01:01 AM

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:

DJ Exprice · 1st July 2006, 01:05 AM

For those of you who have Eagle, here is the file no hassle!

tiltedhalo · 1st July 2006, 01:58 AM

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.

DJ Exprice · 1st July 2006, 02:32 AM

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......

?

tiltedhalo · 1st July 2006, 03:52 AM

A tidbit wright from National..........
http://www.national.com/an/LB/LB-51.pdf#page=1

DJ Exprice · 1st July 2006, 04:01 AM

No more of my idea I guess

LM338 and LM301A are in! LM78XX and LM79XX are OUT

Khron · 1st July 2006, 04:13 PM

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...

DJ Exprice · 1st July 2006, 04:26 PM

Yes please!

Could we also have some Eagle Files?

That would be great!

Khron · 1st July 2006, 04:42 PM

These have only been drawn up in Eagle, no actual boards etched / populated yet

Positive regulator, 11A / 16A (typical / max)

Khron · 1st July 2006, 04:43 PM

Negative regulator, 11A / 16A (typical / max)

1st July 2006, 01:58 AM	#3
tiltedhalo diyAudio Member Join Date: Sep 2005 Location: Melbourne Florida	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.

1st July 2006, 03:52 AM	#5
tiltedhalo diyAudio Member Join Date: Sep 2005 Location: Melbourne Florida	parallel voltage regulators A tidbit wright from National.......... http://www.national.com/an/LB/LB-51.pdf#page=1

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1st July 2006, 02:32 AM	#4
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	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...... ?

1st July 2006, 04:01 AM	#6
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	No more of my idea I guess LM338 and LM301A are in! LM78XX and LM79XX are OUT

1st July 2006, 04:13 PM	#7
Khron diyAudio Member Join Date: Jul 2005 Location: Finland	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...

1st July 2006, 04:26 PM	#8
DJ Exprice diyAudio Member Join Date: Mar 2006 Location: San Francisco, California	Yes please! Could we also have some Eagle Files? That would be great!