High Voltage Regulator Design

dsavitsk · 20th January 2007, 06:56 AM

I am looking for a simple, yet effective, high voltage regulator design that can supply between 20 and 50mA at about 150 to 200V. Any suggestions, or any suggestions on where to look? Solid state is fine, and is probably preferred.

Thanks

Gold_xyz · 20th January 2007, 08:47 AM

look this http://www.tubecad.com/2006/11/blog0087.htm
or the evergreen LM317 with H.T. bjt ...
http://www.national.com/ms/LB/LB-47.pdf

bye

nhuwar · 20th January 2007, 12:54 PM

One thing I was thinking of is youk now how you can hook a normal lm317 and have it switch transistor in series to run at higher voltages. Well I was also wouldering if it can switch igbt because I have igbt rateed at 1600vdc at 10 amps that would do for any regulator anyone would need here.

Nick

jackinnj · 20th January 2007, 01:09 PM

Maida regulator which SY likes, the LastPAS regulator which I like, the LR8N3 regulator.

I had PCB's made up for this circuit -- only a couple -- but should have included a bypass on the adjust pin to ground -- it works very nicely when bypassed:

hacknet · 20th January 2007, 02:45 PM

cant seemt to find the lr8n3 from my usual farnell.

are these chips expensive?

jackinnj · 20th January 2007, 03:39 PM

I have them on my webstore -- the TO-92 version:
email me privately

jackinnj · 27th January 2007, 07:10 PM

fwiw -- here's a simulation of the phase-gain plot for the LastPAS regulator:

leadbelly · 28th January 2007, 02:25 AM

For that service, I would just use the lm317 as is, nothing else required. 50mA at 200V won't come close to overwhelming it for heatsinking. Sure, just one accidental short and the 317 is toast, but who cares, they are cheaper than all the do-hickeys on a Maida regulator. I have a simple 317 regulator in my 160V B+ 6922 preamp and it is still going strong for a year or two now.

EDIT: Forgot to mention, if your design assumption is 15% mains variation, which is way-overdesigning for the homes I have lived in, that's only 30V for a 200V B+, less than the 40Vdiff rating of an LM317 or the 60Vdiff rating of an LM317HV. It'll work fine unless you are trying to burn a lot of voltage.

jackinnj · 28th January 2007, 12:31 PM

Quote:

Originally posted by leadbelly
For that service, I would just use the lm317 as is, nothing else required.

LM317 impedance charts in Audio Amateur crafted by Janneman may change your opinion.

Wavebourn · 28th January 2007, 05:55 PM

You may use simple source follower like one discussed recently,
or this one for better regulation and slow start:

20th January 2007, 06:56 AM	#1
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	High Voltage Regulator Design I am looking for a simple, yet effective, high voltage regulator design that can supply between 20 and 50mA at about 150 to 200V. Any suggestions, or any suggestions on where to look? Solid state is fine, and is probably preferred. Thanks

20th January 2007, 08:47 AM	#2
Gold_xyz diyAudio Member Join Date: Dec 2005 Location: Italy	look this http://www.tubecad.com/2006/11/blog0087.htm or the evergreen LM317 with H.T. bjt ... http://www.national.com/ms/LB/LB-47.pdf bye __________________ My English originates from here

28th January 2007, 02:25 AM	#8
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	For that service, I would just use the lm317 as is, nothing else required. 50mA at 200V won't come close to overwhelming it for heatsinking. Sure, just one accidental short and the 317 is toast, but who cares, they are cheaper than all the do-hickeys on a Maida regulator. I have a simple 317 regulator in my 160V B+ 6922 preamp and it is still going strong for a year or two now. EDIT: Forgot to mention, if your design assumption is 15% mains variation, which is way-overdesigning for the homes I have lived in, that's only 30V for a 200V B+, less than the 40Vdiff rating of an LM317 or the 60Vdiff rating of an LM317HV. It'll work fine unless you are trying to burn a lot of voltage. __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

28th January 2007, 05:55 PM	#10
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	You may use simple source follower like one discussed recently, or this one for better regulation and slow start: __________________ If I disappear suddenly, that means I finally created a time machine and pushed wrong button that brought me to Stalin's Russia. In any experiment any result is the result. Even if it is negative.

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20th January 2007, 12:54 PM	#3
nhuwar diyAudio Member Join Date: Jan 2007 Location: Cypress Texas	One thing I was thinking of is youk now how you can hook a normal lm317 and have it switch transistor in series to run at higher voltages. Well I was also wouldering if it can switch igbt because I have igbt rateed at 1600vdc at 10 amps that would do for any regulator anyone would need here. Nick

20th January 2007, 01:09 PM	#4
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Maida regulator which SY likes, the LastPAS regulator which I like, the LR8N3 regulator. I had PCB's made up for this circuit -- only a couple -- but should have included a bypass on the adjust pin to ground -- it works very nicely when bypassed:

20th January 2007, 02:45 PM	#5
hacknet diyAudio Member Join Date: Nov 2002 Location: sg	cant seemt to find the lr8n3 from my usual farnell. are these chips expensive?

20th January 2007, 03:39 PM	#6
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	I have them on my webstore -- the TO-92 version: email me privately

27th January 2007, 07:10 PM	#7
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	fwiw -- here's a simulation of the phase-gain plot for the LastPAS regulator:

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