Version 4
SHEET 1 2536 992
WIRE 16 -160 -96 -160
WIRE 192 -160 16 -160
WIRE 256 -160 192 -160
WIRE 368 -160 256 -160
WIRE 480 -160 368 -160
WIRE -96 -144 -96 -160
WIRE 256 -144 256 -160
WIRE 368 -144 368 -160
WIRE 480 -128 480 -160
WIRE 640 -128 480 -128
WIRE 880 -128 688 -128
WIRE 976 -128 944 -128
WIRE 1072 -128 976 -128
WIRE 16 -96 16 -160
WIRE 640 -96 640 -128
WIRE 688 -96 688 -128
WIRE 1072 -96 1072 -128
WIRE 976 -80 976 -128
WIRE -96 -48 -96 -64
WIRE 256 -48 256 -80
WIRE 368 -48 368 -64
WIRE 368 -48 256 -48
WIRE 368 -32 368 -48
WIRE 640 16 640 -16
WIRE 640 16 480 16
WIRE 688 16 688 -16
WIRE 976 16 976 -16
WIRE 976 16 688 16
WIRE 1072 16 1072 -16
WIRE 1072 16 976 16
WIRE 192 32 192 -160
WIRE 368 48 368 32
WIRE 480 48 480 16
WIRE 480 48 368 48
WIRE 976 48 976 16
WIRE -80 96 -96 96
WIRE 16 96 16 -16
WIRE 16 96 0 96
WIRE 32 96 16 96
WIRE 384 96 352 96
WIRE 480 96 480 48
WIRE 480 96 464 96
WIRE -80 176 -96 176
WIRE 32 176 0 176
WIRE 480 176 480 96
WIRE 480 176 352 176
WIRE -80 256 -96 256
WIRE 32 256 0 256
WIRE 368 256 352 256
WIRE 464 256 448 256
WIRE -80 336 -96 336
WIRE 32 336 -16 336
WIRE 368 336 352 336
WIRE 464 336 432 336
WIRE 128 416 128 400
WIRE 128 496 128 480
WIRE 256 496 256 400
FLAG 256 496 0
FLAG 128 496 0
FLAG -96 336 0
FLAG -96 176 0
FLAG -96 256 0
FLAG -96 -48 0
FLAG 464 336 0
FLAG 464 256 0
FLAG -96 -160 IN
FLAG 1072 -128 OUT
FLAG -96 96 0
FLAG 976 48 0
SYMBOL PowerProducts\\LT3573 192 208 R0
SYMATTR InstName U1
SYMBOL res 16 240 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res 16 160 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 28.7K
SYMBOL voltage -96 -160 R0
WINDOW 123 24 146 Left 0
WINDOW 39 24 125 Left 0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL cap -16 320 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
WINDOW 39 60 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 220p
SYMATTR SpiceLine Rser=51.1K
SYMBOL cap 432 320 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C2
SYMATTR Value 4.7µ
SYMBOL res 480 80 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 80.6K
SYMBOL res 464 240 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 6.04K
SYMBOL cap 960 -80 R0
SYMATTR InstName C3
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=2m
SYMBOL schottky 880 -112 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D1
SYMATTR Value MBRS340
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 112 480 M180
WINDOW 0 24 53 Left 0
WINDOW 3 24 8 Left 0
SYMATTR InstName C4
SYMATTR Value .005µ
SYMBOL res 0 -112 R0
SYMATTR InstName R6
SYMATTR Value 274K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 16 80 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R7
SYMATTR Value 51.1K
SYMBOL res 352 -160 R0
SYMATTR InstName R8
SYMATTR Value 2K
SYMBOL cap 240 -144 R0
SYMATTR InstName C5
SYMATTR Value .22µ
SYMATTR SpiceLine Rser=30m
SYMBOL diode 352 32 M180
WINDOW 0 36 52 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL ind2 624 -112 R0
WINDOW 0 -4 5 Right 0
WINDOW 3 -4 31 Right 0
WINDOW 39 -5 85 Right 0
WINDOW 123 -5 58 Right 0
WINDOW 40 -5 109 Right 0
SYMATTR InstName L1
SYMATTR Value 29.3µ
SYMATTR SpiceLine Rpar=10K
SYMATTR Value2 Rser=62m
SYMATTR SpiceLine2 Cpar=4p
SYMATTR Type ind
SYMBOL ind2 704 0 R180
WINDOW 0 -7 108 Right 0
WINDOW 3 -7 85 Right 0
WINDOW 123 -6 59 Right 0
WINDOW 39 -6 32 Right 0
WINDOW 40 -7 5 Right 0
SYMATTR InstName L2
SYMATTR Value 3.27µ
SYMATTR Value2 Rser=13.4m
SYMATTR SpiceLine Rpar=1.5K
SYMATTR SpiceLine2 Cpar=33p
SYMATTR Type ind
SYMBOL res 1056 -112 R0
SYMATTR InstName Rload
SYMATTR Value 10
TEXT 792 296 Left 0 !.tran 2m startup
TEXT 664 16 Top 0 ;Würth / MIDCOM\n750370047
TEXT 664 -128 Bottom 0 !K1 L1 L2 .995
TEXT 664 -160 Bottom 0 ;T1
TEXT 1168 -240 Right 0 ;5.6% of output power wasted here due to leakage inductance.
LINE Normal 464 -224 416 -168
LINE Normal 1168 -224 464 -224
LINE Normal 422 -184 416 -168
LINE Normal 430 -177 416 -168
RECTANGLE Normal 848 80 496 -160 2
CIRCLE Normal 432 -32 320 -192 2