Version 4
SHEET 1 1792 932
WIRE -368 -672 -400 -672
WIRE 848 -672 816 -672
WIRE -400 -640 -400 -672
WIRE 848 -640 848 -672
WIRE -224 -512 -288 -512
WIRE -48 -512 -224 -512
WIRE 176 -512 80 -512
WIRE 272 -512 176 -512
WIRE 496 -512 400 -512
WIRE 592 -512 496 -512
WIRE 640 -512 592 -512
WIRE 752 -512 720 -512
WIRE -224 -480 -224 -512
WIRE -48 -480 -48 -512
WIRE 80 -480 80 -512
WIRE 400 -480 400 -512
WIRE 272 -464 272 -512
WIRE 592 -464 592 -512
WIRE -224 -384 -224 -416
WIRE -224 -384 -272 -384
WIRE 80 -368 80 -400
WIRE 272 -368 272 -400
WIRE -224 -352 -224 -384
WIRE -48 -352 -48 -400
WIRE 400 -352 400 -400
WIRE 592 -352 592 -400
WIRE 592 -224 496 -224
WIRE 688 -224 592 -224
WIRE -224 -208 -304 -208
WIRE -144 -208 -224 -208
WIRE -96 -208 -144 -208
WIRE 16 -208 -16 -208
WIRE 32 -208 16 -208
WIRE 64 -208 32 -208
WIRE 160 -208 144 -208
WIRE 176 -208 160 -208
WIRE 288 -208 256 -208
WIRE 496 -192 496 -224
WIRE -144 -176 -144 -208
WIRE 688 -176 688 -224
WIRE -224 -160 -224 -208
WIRE 32 -160 32 -208
WIRE 496 -80 496 -112
WIRE 688 -80 688 -112
WIRE -272 -64 -288 -64
WIRE 32 -64 32 -96
WIRE 112 -64 32 -64
WIRE 176 -64 112 -64
WIRE 288 -64 256 -64
WIRE -224 -48 -224 -96
WIRE -144 -48 -144 -96
WIRE -272 96 -304 96
WIRE -144 96 -192 96
WIRE -128 96 -144 96
WIRE -96 96 -128 96
WIRE 0 96 -16 96
WIRE 592 96 496 96
WIRE 688 96 592 96
WIRE 496 128 496 96
WIRE -144 144 -144 96
WIRE 688 144 688 96
WIRE 496 240 496 208
WIRE 688 240 688 208
WIRE -144 256 -144 208
WIRE -272 352 -288 352
WIRE -144 352 -192 352
WIRE -112 352 -144 352
WIRE -80 352 -112 352
WIRE 592 352 496 352
WIRE 688 352 592 352
WIRE 752 352 736 352
WIRE 496 384 496 352
WIRE -144 400 -144 352
WIRE 688 400 688 352
WIRE 496 496 496 464
WIRE 688 496 688 464
WIRE -144 512 -144 464
WIRE -400 608 -400 576
WIRE -368 608 -400 608
WIRE 848 608 848 576
WIRE 848 608 816 608
FLAG 16 -208 er
FLAG 592 96 latch
FLAG -112 352 hys
FLAG 496 240 0
FLAG 688 240 0
FLAG 176 -512 ok
FLAG 80 -368 0
FLAG 272 -368 0
FLAG 496 -80 0
FLAG 752 -512 Out
IOPIN 752 -512 Out
FLAG 688 -80 0
FLAG -288 -512 Vcc
IOPIN -288 -512 In
FLAG 592 352 Ierr
FLAG 496 496 0
FLAG 688 496 0
FLAG -304 96 Ref
IOPIN -304 96 Out
FLAG -288 352 Osc
IOPIN -288 352 In
FLAG -272 -384 Com
IOPIN -272 -384 In
FLAG 752 352 Ifb
IOPIN 752 352 In
FLAG -128 96 5
FLAG -304 -208 Err
IOPIN -304 -208 Out
FLAG -288 -64 Vfb
IOPIN -288 -64 In
FLAG 592 -224 drv
FLAG 112 -64 2v5
FLAG -144 512 COM
FLAG 496 -512 o
FLAG 160 -208 e
FLAG -224 -352 COM
FLAG 592 -352 COM
FLAG -224 -48 COM
FLAG -144 256 COM
FLAG 288 -208 COM
FLAG 288 -64 COM
FLAG -144 -48 COM
FLAG 400 -352 COM
FLAG 0 96 Vcc
FLAG -48 -352 COM
SYMBOL bi -144 -96 R180
WINDOW 0 24 88 Left 2
WINDOW 3 208 176 Right 2
SYMATTR InstName Be1
SYMATTR Value I = limit(10*V(er,Err),.8m,-6m)*V(ok)
SYMBOL bi -272 352 R270
WINDOW 0 -34 40 VBottom 2
WINDOW 3 -192 -80 VRight 2
WINDOW 123 -160 -80 VRight 2
SYMATTR InstName Bosc
SYMATTR Value I = 8.3m*u(V(hys,com)+V(Osc,Com)-2.6)
SYMATTR Value2 tripdt=300n
SYMBOL cap -160 400 R0
WINDOW 0 32 0 Left 2
WINDOW 3 32 64 Left 2
WINDOW 39 0 64 Right 2
SYMATTR InstName Cosc
SYMATTR Value 50p
SYMATTR SpiceLine Rpar={1.7/8.3m}
SYMBOL bi 496 -112 M180
WINDOW 0 48 64 Left 2
WINDOW 3 304 -96 Right 2
WINDOW 123 48 32 Left 2
WINDOW 39 32 0 Left 2
SYMATTR InstName Bdrv
SYMATTR Value I = V(ok) & V(latch) & !V(hys,com)
SYMATTR Value2 Rpar=1
SYMATTR SpiceLine tripdt=30n
SYMBOL bi 496 208 M180
WINDOW 0 48 63 Left 2
WINDOW 3 304 160 Right 2
WINDOW 123 48 32 Left 2
WINDOW 39 32 0 Left 2
SYMATTR InstName Blch
SYMATTR Value I = (u(V(Ierr)) & V(latch)) | V(hys,com)
SYMATTR Value2 Rpar=1
SYMATTR SpiceLine tripdt=30n
SYMBOL cap 672 144 R0
WINDOW 0 32 0 Left 2
WINDOW 3 32 64 Left 2
SYMATTR InstName Clch
SYMATTR Value 10n
SYMBOL bi 80 -400 R180
WINDOW 0 -48 64 Right 2
WINDOW 3 16 160 Right 2
WINDOW 123 -48 32 Right 2
SYMATTR InstName Bok
SYMATTR Value I = u(V(Vcc,Com)-8.5+.6*V(ok))
SYMATTR Value2 Rpar=1
SYMBOL cap 256 -464 R0
WINDOW 0 32 0 Left 2
WINDOW 3 32 64 Left 2
SYMATTR InstName Cok
SYMATTR Value 100n
SYMBOL cap 672 -176 R0
WINDOW 0 32 0 Left 2
WINDOW 3 32 64 Left 2
SYMATTR InstName Cdrv
SYMATTR Value 10n
SYMBOL bi 496 464 M180
WINDOW 0 48 64 Left 2
WINDOW 3 304 -80 Right 2
WINDOW 123 48 32 Left 2
SYMATTR InstName BIer
SYMATTR Value I = limit(V(Err,Com)-1.2,3,0)-3*V(Ifb,Com)
SYMATTR Value2 Rpar=1
SYMBOL cap 672 400 R0
WINDOW 0 32 0 Left 2
WINDOW 3 32 64 Left 2
SYMATTR InstName CIer
SYMATTR Value 300n
SYMBOL bi -48 -480 R0
WINDOW 0 -48 16 Right 2
WINDOW 3 -304 -80 Left 2
WINDOW 123 -40 48 Right 2
SYMATTR InstName Bi
SYMATTR Value I = 11m*V(ok) + V(drv)*I(Vo)
SYMATTR Value2 Rpar=27k
SYMBOL bi -16 96 R90
WINDOW 0 -32 40 VBottom 2
WINDOW 3 -80 336 VLeft 2
SYMATTR InstName Bref
SYMATTR Value I = limit(5*V(ok)-V(5,Com),80m,0)
SYMBOL res -176 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Rref
SYMATTR Value 2
SYMBOL cap -128 144 M0
WINDOW 0 32 0 Left 2
WINDOW 3 32 64 Left 2
SYMATTR InstName Cref
SYMATTR Value 10n
SYMBOL cap 48 -160 M0
SYMATTR InstName Ce2
SYMATTR Value 10n
SYMBOL bv 160 -208 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -45 57 VBottom 2
SYMATTR InstName Be2
SYMATTR Value V = limit(3k*V(2v5,Vfb),6,.7)
SYMBOL res 160 -224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Re2
SYMATTR Value 50k
SYMBOL res 0 -224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Re1
SYMATTR Value 5e6
SYMBOL bv 160 -64 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -39 56 VBottom 2
SYMATTR InstName B2v5
SYMATTR Value V = 2.5*V(ok)
SYMBOL zener -208 -416 R180
WINDOW 0 48 48 Left 2
WINDOW 3 48 16 Left 2
SYMATTR InstName Di
SYMATTR Value 34V
SYMBOL cap 576 -464 R0
WINDOW 0 32 0 Left 2
WINDOW 3 32 64 Left 2
SYMATTR InstName Co
SYMATTR Value 30n
SYMBOL cap -208 -160 M0
SYMATTR InstName Ce1
SYMATTR Value 30p
SYMBOL bi 400 -400 M180
WINDOW 0 48 64 Left 2
WINDOW 3 402 -81 Right 2
WINDOW 39 32 0 Left 2
WINDOW 123 48 32 Left 2
SYMATTR InstName Bo
SYMATTR Value I = V(drv)*V(Vcc,Com)+table(-I(Vo),-1m,-1.3,0,0,.09,.5,.11,1.3,.3,1.4,1,5)
SYMATTR SpiceLine tripdt=30n
SYMATTR Value2 Rpar=1
SYMBOL voltage 624 -512 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
WINDOW 123 -32 56 VBottom 2
WINDOW 39 -32 56 VBottom 2
SYMATTR InstName Vo
SYMATTR Value 0
TEXT -336 -608 Left 2 !.model 34V D(Ron=.5 Vfwd=.5 Vrev=34 Rrev=22)
TEXT 216 128 Center 2 ;>> UC3843A <<\nBehavioral Model\nCopyright 2003 by\nanalog@ieee.org
RECTANGLE Normal 832 592 -384 -656