Thread: Ta-da!
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Jamie M Jamie M is offline
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Default Ta-da!
On 10/7/2012 3:59 PM, Jim Thompson wrote:
Critiques, suggestions welcome...

http://www.analog-innovations.com/SE...ype_Supply.pdf

Sand in air ignored.

...Jim Thompson

I don't know for sure but guess that circuit is for the initial
start up, until the flyback takes over. I have a circuit I made
using a depletion mode fet too that works for this and has been
built.

cheers,
Jamie


Version 4
SHEET 1 7488 1496
WIRE 1840 -1104 -1648 -1104
WIRE -48 -704 -656 -704
WIRE 144 -704 -48 -704
WIRE 352 -704 208 -704
WIRE 736 -704 352 -704
WIRE -48 -688 -48 -704
WIRE 352 -624 352 -704
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WIRE 128 -96 128 -400
WIRE 208 -96 128 -96
WIRE 288 -96 208 -96
WIRE -656 -80 -656 -128
WIRE 624 -64 624 -112
WIRE 704 -64 624 -64
WIRE 208 -48 208 -96
WIRE 288 -32 288 -96
WIRE 336 -32 288 -32
WIRE 480 -32 400 -32
WIRE 512 -32 480 -32
WIRE 544 -32 512 -32
WIRE 640 -32 608 -32
WIRE 944 -32 864 -32
WIRE 1168 -32 1008 -32
WIRE 1376 -32 1168 -32
WIRE 704 -16 704 -64
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WIRE 736 -16 704 -16
WIRE 1168 0 1168 -32
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WIRE 1376 16 1376 -32
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WIRE 960 48 864 48
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WIRE 960 80 960 48
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WIRE 336 96 128 96
WIRE 1168 112 1168 64
WIRE 128 128 128 96
WIRE 336 144 336 96
WIRE 560 144 336 144
WIRE 656 144 624 144
WIRE 736 144 736 -16
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WIRE 1840 1392 -1648 1392
FLAG -656 -80 0
FLAG 496 80 0
FLAG 960 80 0
FLAG -48 -112 0
FLAG -1088 -96 0
FLAG 480 -32 vref
FLAG -240 16 vref
FLAG 208 64 0
FLAG 1168 112 0
FLAG 1376 144 0
FLAG 128 672 0
FLAG 352 -496 0
SYMBOL res -176 304 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res -336 48 R0
SYMATTR InstName R2
SYMATTR Value 33k
SYMBOL res -336 208 R0
SYMATTR InstName R3
SYMATTR Value 4.7k
SYMBOL res 656 416 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL cap -176 464 R0
SYMATTR InstName C1
SYMATTR Value 1.8n
SYMBOL cap -112 192 R0
SYMATTR InstName C2
SYMATTR Value 100p
SYMBOL res -192 176 R0
SYMATTR InstName R5
SYMATTR Value 150k
SYMBOL res 720 448 R0
SYMATTR InstName R6
SYMATTR Value 0.5
SYMBOL cap 464 480 R0
SYMATTR InstName C3
SYMATTR Value 470p
SYMBOL res 560 256 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R7
SYMATTR Value 22
SYMBOL cap -672 -192 R0
SYMATTR InstName C4
SYMATTR Value 0.01µ
SYMBOL ind2 720 -128 R0
SYMATTR InstName L1
SYMATTR Value 1mH
SYMATTR Type ind
SYMATTR SpiceLine Rser=1.1 Cpar=30p
SYMBOL ind2 624 64 M180
WINDOW 0 36 80 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName L2
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SYMATTR Type ind
SYMATTR SpiceLine Rser=0.4
SYMBOL cap 192 -48 R0
SYMATTR InstName C6
SYMATTR Value 10µ
SYMBOL ind2 880 64 R180
WINDOW 0 36 80 Left 0
WINDOW 3 49 40 Left 0
SYMATTR InstName L3
SYMATTR Value 28µH
SYMATTR Type ind
SYMATTR SpiceLine Rser=0.037
SYMBOL diode 944 -16 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D4
SYMATTR Value GSD2004W-V
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WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
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SYMATTR SpiceModel SMAZ16
SYMBOL schottky 528 176 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName D3
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
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WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
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WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName D2
SYMATTR Value GSD2004W-V
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WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
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SYMBOL diode 400 -48 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
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SYMATTR Value GSD2004W-V
SYMBOL cap 496 -32 R0
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SYMATTR Value 0.1µ
SYMBOL nmos -96 -688 R0
SYMATTR InstName M1
SYMATTR Value DN2535
SYMBOL res -32 -448 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
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SYMATTR Value 1K
SYMBOL PowerProducts\\LT1246 128 272 R0
SYMATTR InstName U1
SYMBOL polcap 1152 0 R0
SYMATTR InstName C10
SYMATTR Value 100µ
SYMBOL res 1360 0 R0
SYMATTR InstName R9
SYMATTR Value 15
SYMBOL nmos 688 144 R0
SYMATTR InstName M2
SYMATTR Value STP8NM60
SYMBOL schottky 672 320 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D1
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 624 128 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName D6
SYMATTR Value 1N5819
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL npn -192 400 M0
SYMATTR InstName Q1
SYMBOL res -272 496 R0
SYMATTR InstName R11
SYMATTR Value 1meg
SYMBOL res 608 -304 R0
SYMATTR InstName R12
SYMATTR Value 100
SYMBOL cap 608 -176 R0
SYMATTR InstName C5
SYMATTR Value 0.047nF
SYMBOL diode 144 -688 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D7
SYMATTR Value GSD2004W-V
SYMBOL cap 336 -624 R0
SYMATTR InstName C8
SYMATTR Value 44µF
TEXT -128 824 Left 0 !.tran 1000m startup
TEXT 768 120 Left 0 !K L1 L2 L3 1
TEXT -1080 888 Left 0 !.options reltol=0.01
TEXT -1080 928 Left 0 !.options trtol=7
TEXT -1088 968 Left 0 !.options Gmin=1e-9 method=Gear
TEXT -1080 792 Left 0 !.include supertex.lib
TEXT -744 -840 Left 0 ;ICE components part#: TX08069 (100kHz flyback
transformer 120VDC-170VDC input and 20VDC output@1200mA plus 20Vaux@50mA)
TEXT -728 -776 Left 0 ;how can we get full 1200mA regulated output load?
(our bias winding is 20V but our output sags at high current draw..)

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