Forums

little HV supply

Started by John Larkin June 27, 2015

Here's a little high-voltage supply. I only need the HV1 (250V) and
HV4 (1200V) outputs. It needs tuning, but I need lunch first. Maybe a
less fierce mosfet, maybe a bit of snubbing, maybe I'll take the
feedback from HV4. I'd prefer less primary inductance in the
transformer, but that Coilcraft thing should work.

This is to power a pulsed driver into a Pockels-cell-like gadget, for
an optical application. Sort of a charity job.

Version 4
SHEET 1 2184 704
WIRE 1312 -608 1280 -608
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FLAG 1904 -608 HV4
SYMBOL PowerProducts\\LTC3803 144 256 R0
SYMATTR InstName U1
SYMBOL ind2 480 -48 R0
WINDOW 0 -32 36 Right 2
WINDOW 3 -30 74 Right 2
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SYMATTR Value 300�
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SYMBOL ind2 592 64 R180
WINDOW 0 -26 76 Right 2
WINDOW 3 -26 44 Right 2
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SYMATTR Value 2.7m
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WINDOW 3 75 84 Left 2
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SYMATTR Value Si4848DY
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SYMATTR InstName R1
SYMATTR Value 50m
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WINDOW 0 -50 33 Left 2
WINDOW 3 -52 64 Left 2
SYMATTR InstName R2
SYMATTR Value 1K
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WINDOW 0 -97 78 Left 2
WINDOW 3 -126 43 Left 2
SYMATTR InstName R3
SYMATTR Value 6.25Meg
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WINDOW 0 -74 64 Left 2
WINDOW 3 -80 31 Left 2
SYMATTR InstName R4
SYMATTR Value 20K
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SYMATTR Value 22n
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SYMATTR Value 10�
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pn="C575OX7RIE106M" type="X7R" ppPkg=1
SYMBOL res -32 240 R90
WINDOW 0 -62 55 VBottom 2
WINDOW 3 -49 59 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
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WINDOW 0 -72 44 Left 2
WINDOW 3 -82 7 Left 2
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WINDOW 39 0 0 Left 2
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SYMATTR Value 24
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WINDOW 3 5 56 VBottom 2
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WINDOW 3 -18 97 VBottom 2
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SYMATTR Value 1
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WINDOW 3 45 28 VTop 2
SYMATTR InstName C4
SYMATTR Value 100�
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WINDOW 3 -32 31 VBottom 2
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SYMBOL diode 1056 -176 R180
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WINDOW 3 -27 -35 Left 2
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SYMBOL cap 832 -256 R270
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WINDOW 3 104 34 VBottom 2
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SYMATTR Value 22n
SYMBOL cap 1296 -176 R180
WINDOW 0 -59 45 Left 2
WINDOW 3 -65 15 Left 2
SYMATTR InstName C7
SYMATTR Value 22n
SYMBOL diode 1104 -256 R270
WINDOW 0 -31 30 VTop 2
WINDOW 3 -32 31 VBottom 2
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WINDOW 0 54 48 Left 2
WINDOW 3 57 81 Left 2
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SYMATTR Value 1Meg
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WINDOW 3 -27 -35 Left 2
SYMATTR InstName D4
SYMBOL cap 1488 -336 R180
WINDOW 0 -52 46 Left 2
WINDOW 3 -60 16 Left 2
SYMATTR InstName C5
SYMATTR Value 22n
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SYMATTR InstName D5
SYMBOL cap 1120 -416 R270
WINDOW 0 77 32 VTop 2
WINDOW 3 71 33 VBottom 2
SYMATTR InstName C8
SYMATTR Value 22n
SYMBOL diode 1488 -512 R180
WINDOW 0 -37 -6 Left 2
WINDOW 3 -27 -35 Left 2
SYMATTR InstName D6
SYMBOL cap 1680 -512 R180
WINDOW 0 -52 46 Left 2
WINDOW 3 -60 16 Left 2
SYMATTR InstName C9
SYMATTR Value 22n
SYMBOL diode 1536 -592 R270
WINDOW 0 -31 30 VTop 2
WINDOW 3 -32 31 VBottom 2
SYMATTR InstName D7
SYMBOL cap 1312 -592 R270
WINDOW 0 -38 33 VTop 2
WINDOW 3 -43 34 VBottom 2
SYMATTR InstName C10
SYMATTR Value 22n
TEXT 528 -136 Bottom 2 !K1 L1 L2 1
TEXT 216 -440 Left 2 !.tran 10ms startup
TEXT 440 -192 Left 2 ;Coilcraft HA4060  1:3
TEXT 1080 256 Left 2 ;0.8V
TEXT 1080 -312 Left 2 ;MMBD5004
TEXT 120 -512 Left 2 ;HV SUPPLY   J LARKIN  June 27, 2015
TEXT 840 -312 Left 2 ;500V



-- 

John Larkin         Highland Technology, Inc
picosecond timing   laser drivers and controllers

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

On Sat, 27 Jun 2015 14:16:20 -0700, John Larkin
<jlarkin@highlandtechnology.com> Gave us:

>Here's a little high-voltage supply.
Quite lame. Nearly all HV applications require a supply made specifically for the load circumstance of the application's requirements of the situation involved. Lame also because you sport multiple outputs. Lame to the third, because you tout one of those as being a mere tap off of the other generation. As "HV supplies" go, it is a fail all the way around.
On Sat, 27 Jun 2015 18:23:06 -0400, DecadentLinuxUserNumeroUno
<DLU1@DecadentLinuxUser.org> wrote:

>On Sat, 27 Jun 2015 14:16:20 -0700, John Larkin ><jlarkin@highlandtechnology.com> Gave us: > >>Here's a little high-voltage supply. > > > Quite lame. Nearly all HV applications require a supply made >specifically for the load circumstance of the application's requirements >of the situation involved.
Gosh. Couldn't have said that better meself.
> > Lame also because you sport multiple outputs.
Right, nobody designs multiple-output power supplies. Especially switchers.
> >Lame to the third, because you tout one of those as being a mere tap off >of the other generation.
Can you expand on that please? -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
On Sat, 27 Jun 2015 15:39:38 -0700, John Larkin
<jlarkin@highlandtechnology.com> Gave us:

>Gosh. Couldn't have said that better meself.
Gosh (wuss), you're an idiot. But we knew that. Some idiot probably trying to get you to help him make some kind of shock device without industry approvals. If so, I hope you both end up getting sued or jailed or both.
On Sat, 27 Jun 2015 14:16:20 -0700, John Larkin
<jlarkin@highlandtechnology.com> Gave us:

>TEXT 120 -512 Left 2 ;HV SUPPLY J LARKIN June 27, 2015
You are a true retard.
In article <n34uoatir3rq6qocbjqecgq4ijhas72s8t@4ax.com>, 
jlarkin@highlandtechnology.com says...
> > > Here's a little high-voltage supply. I only need the HV1 (250V) and > HV4 (1200V) outputs. It needs tuning, but I need lunch first. Maybe a > less fierce mosfet, maybe a bit of snubbing, maybe I'll take the > feedback from HV4. I'd prefer less primary inductance in the > transformer, but that Coilcraft thing should work. > > This is to power a pulsed driver into a Pockels-cell-like gadget, for > an optical application. Sort of a charity job. > > >
C1 needs to be increase to at least 1uf, otherwise the feed back is getting very choppy and resulting from a bad start up and lots of noise.. I ran it with 1uf and it looks good. Jamie
On Sat, 27 Jun 2015 18:54:29 -0400, M Philbrook
<jamie_ka1lpa@charter.net> wrote:

>In article <n34uoatir3rq6qocbjqecgq4ijhas72s8t@4ax.com>, >jlarkin@highlandtechnology.com says... >> >> >> Here's a little high-voltage supply. I only need the HV1 (250V) and >> HV4 (1200V) outputs. It needs tuning, but I need lunch first. Maybe a >> less fierce mosfet, maybe a bit of snubbing, maybe I'll take the >> feedback from HV4. I'd prefer less primary inductance in the >> transformer, but that Coilcraft thing should work. >> >> This is to power a pulsed driver into a Pockels-cell-like gadget, for >> an optical application. Sort of a charity job. >> >> >> > C1 needs to be increase to at least 1uf, otherwise the >feed back is getting very choppy and resulting from a >bad start up and lots of noise.. > > I ran it with 1uf and it looks good. > >Jamie
Hey, I said it needed tuning. But I can get 22nF 500 volt ceramic caps cheap. The startup is a little ratty, but that doesn't matter. I do need to tune the loop compensation, which is currently just a wild guess. I don't want to design a HV supply, but I need the two outputs, and the commercial bricks are really expensive. One output is for applying an adjustable initial bias to the optical thing, and the other is for a short HV pulse. I bet that LT Spice has sold a billion dollars worth of ICs by now. It's so easy to pick an LTC part, import the demo circuit, and tweak. Then just buy the expensive LTC chips. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
In article <2jauoa9r6sa3rmpnafrisn903iv7ak2ffn@4ax.com>, 
jlarkin@highlandtechnology.com says...
> > On Sat, 27 Jun 2015 18:54:29 -0400, M Philbrook > <jamie_ka1lpa@charter.net> wrote: > > >In article <n34uoatir3rq6qocbjqecgq4ijhas72s8t@4ax.com>, > >jlarkin@highlandtechnology.com says... > >> > >> > >> Here's a little high-voltage supply. I only need the HV1 (250V) and > >> HV4 (1200V) outputs. It needs tuning, but I need lunch first. Maybe a > >> less fierce mosfet, maybe a bit of snubbing, maybe I'll take the > >> feedback from HV4. I'd prefer less primary inductance in the > >> transformer, but that Coilcraft thing should work. > >> > >> This is to power a pulsed driver into a Pockels-cell-like gadget, for > >> an optical application. Sort of a charity job. > >> > >> > >> > > C1 needs to be increase to at least 1uf, otherwise the > >feed back is getting very choppy and resulting from a > >bad start up and lots of noise.. > > > > I ran it with 1uf and it looks good. > > > >Jamie > > Hey, I said it needed tuning. But I can get 22nF 500 volt ceramic caps > cheap. The startup is a little ratty, but that doesn't matter. I do > need to tune the loop compensation, which is currently just a wild > guess. > > I don't want to design a HV supply, but I need the two outputs, and > the commercial bricks are really expensive. One output is for applying > an adjustable initial bias to the optical thing, and the other is for > a short HV pulse. > > I bet that LT Spice has sold a billion dollars worth of ICs by now. > It's so easy to pick an LTC part, import the demo circuit, and tweak. > Then just buy the expensive LTC chips.
It's like some of the PLC s systems I screw around with. One family charges you all out doors for the programming tools to program their hardware, where as many others offer free programming tools for PLC's that do more than is needed most of the time and the hardware price is even lower, in many cases much lower. I am sure you can guess which ones have been selling more hardware lately:) Jamie
On Sat, 27 Jun 2015 16:11:34 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

>On Sat, 27 Jun 2015 18:54:29 -0400, M Philbrook ><jamie_ka1lpa@charter.net> wrote: > >>In article <n34uoatir3rq6qocbjqecgq4ijhas72s8t@4ax.com>, >>jlarkin@highlandtechnology.com says... >>> >>> >>> Here's a little high-voltage supply. I only need the HV1 (250V) and >>> HV4 (1200V) outputs. It needs tuning, but I need lunch first. Maybe a >>> less fierce mosfet, maybe a bit of snubbing, maybe I'll take the >>> feedback from HV4. I'd prefer less primary inductance in the >>> transformer, but that Coilcraft thing should work. >>> >>> This is to power a pulsed driver into a Pockels-cell-like gadget, for >>> an optical application. Sort of a charity job. >>> >>> >>> >> C1 needs to be increase to at least 1uf, otherwise the >>feed back is getting very choppy and resulting from a >>bad start up and lots of noise.. >> >> I ran it with 1uf and it looks good. >> >>Jamie > >Hey, I said it needed tuning. But I can get 22nF 500 volt ceramic caps >cheap. The startup is a little ratty, but that doesn't matter. I do >need to tune the loop compensation, which is currently just a wild >guess. > >I don't want to design a HV supply, but I need the two outputs, and >the commercial bricks are really expensive. One output is for applying >an adjustable initial bias to the optical thing, and the other is for >a short HV pulse. > >I bet that LT Spice has sold a billion dollars worth of ICs by now. >It's so easy to pick an LTC part, import the demo circuit, and tweak. >Then just buy the expensive LTC chips.
Adding the slope compensation resistor (5K from R1 to U1.Sense) really cleans things up. Tuning a switcher is a PITA. Every run takes several minutes, and there are too many knobs to turn. Almost makes a boy want to do math. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
In article <gjduoa1sf35bt3u2rtnq040ncu58abh02c@4ax.com>, 
jlarkin@highlandtechnology.com says...
> > On Sat, 27 Jun 2015 16:11:34 -0700, John Larkin > <jlarkin@highlandtechnology.com> wrote: > > >On Sat, 27 Jun 2015 18:54:29 -0400, M Philbrook > ><jamie_ka1lpa@charter.net> wrote: > > > >>In article <n34uoatir3rq6qocbjqecgq4ijhas72s8t@4ax.com>, > >>jlarkin@highlandtechnology.com says... > >>> > >>> > >>> Here's a little high-voltage supply. I only need the HV1 (250V) and > >>> HV4 (1200V) outputs. It needs tuning, but I need lunch first. Maybe a > >>> less fierce mosfet, maybe a bit of snubbing, maybe I'll take the > >>> feedback from HV4. I'd prefer less primary inductance in the > >>> transformer, but that Coilcraft thing should work. > >>> > >>> This is to power a pulsed driver into a Pockels-cell-like gadget, for > >>> an optical application. Sort of a charity job. > >>> > >>> > >>> > >> C1 needs to be increase to at least 1uf, otherwise the > >>feed back is getting very choppy and resulting from a > >>bad start up and lots of noise.. > >> > >> I ran it with 1uf and it looks good. > >> > >>Jamie > > > >Hey, I said it needed tuning. But I can get 22nF 500 volt ceramic caps > >cheap. The startup is a little ratty, but that doesn't matter. I do > >need to tune the loop compensation, which is currently just a wild > >guess. > > > >I don't want to design a HV supply, but I need the two outputs, and > >the commercial bricks are really expensive. One output is for applying > >an adjustable initial bias to the optical thing, and the other is for > >a short HV pulse. > > > >I bet that LT Spice has sold a billion dollars worth of ICs by now. > >It's so easy to pick an LTC part, import the demo circuit, and tweak. > >Then just buy the expensive LTC chips. > > Adding the slope compensation resistor (5K from R1 to U1.Sense) really > cleans things up. > > Tuning a switcher is a PITA. Every run takes several minutes, and > there are too many knobs to turn. Almost makes a boy want to do math.
Still looks like crap to me, I really didn't see it do much over here, so I put the 1uf back over to C1 and it's just wonderful :) btw, I ran that on my Dell XPS (8 core / 12g) buzzing a long very good. I once played with the core level settings and I think I was able to get LTspice to run a single core by it self. I can't say if it really made that much of a difference ? Jamie