Version 4 SHEET 1 1004 680 WIRE 96 80 -48 80 WIRE 192 80 96 80 WIRE 352 80 272 80 WIRE 576 80 512 80 WIRE 704 80 640 80 WIRE 848 80 704 80 WIRE -48 128 -48 80 WIRE 96 128 96 80 WIRE 352 128 352 80 WIRE 512 128 512 80 WIRE 704 128 704 80 WIRE 848 128 848 80 WIRE 304 144 208 144 WIRE 208 160 208 144 WIRE 304 240 304 192 WIRE 304 240 208 240 WIRE -48 256 -48 208 WIRE 96 256 96 192 WIRE 208 256 208 240 WIRE 352 256 352 208 WIRE 512 256 512 208 WIRE 704 256 704 192 WIRE 848 256 848 208 FLAG -48 256 0 FLAG 96 256 0 FLAG 704 256 0 FLAG 848 256 0 FLAG 352 256 0 FLAG 208 256 0 FLAG 848 80 OUT FLAG 512 256 0 SYMBOL voltage -48 112 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL cap 80 128 R0 SYMATTR InstName C1 SYMATTR Value 10µ SYMBOL sw 352 112 R0 WINDOW 0 18 -8 VRight 2 WINDOW 3 50 24 VRight 2 SYMATTR InstName S1 SYMATTR Value FETsw SYMBOL ind2 176 96 R270 WINDOW 0 18 120 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 220µ SYMATTR Type ind SYMBOL schottky 576 64 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value 1N5819 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 688 128 R0 SYMATTR InstName C2 SYMATTR Value 47µ SYMBOL res 832 112 R0 SYMATTR InstName R1 SYMATTR Value 120 SYMBOL voltage 208 256 R180 WINDOW 3 -625 -34 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PWL repeat forever (0s 0V 5us 1V 10us 0V) endrepeat SYMATTR InstName V2 SYMBOL ind2 528 224 R180 WINDOW 0 17 115 Left 2 WINDOW 3 -53 62 Left 2 SYMATTR InstName L2 SYMATTR Value 22m SYMATTR Type ind TEXT 8 0 Left 2 !.model FETsw sw(Vt={1-{Duty}} Ron=1u) TEXT 600 0 Left 2 !.param Duty=.5 TEXT -64 288 Left 2 !.tran 0 50m 0 10n startup TEXT 352 32 Left 2 !K12 L1 L2 1 TEXT 368 64 Left 1 ;û]M0peÔkÿ1:10 LINE Normal 480 48 192 48 2 LINE Normal 480 208 480 48 2 LINE Normal 480 208 480 208 2 LINE Normal 480 208 480 208 2 LINE Normal 480 208 480 208 2