Version 4 SHEET 1 1976 804 WIRE 96 -336 96 -352 WIRE 224 -336 224 -352 WIRE 592 -272 352 -272 WIRE 656 -272 592 -272 WIRE 224 -256 224 -272 WIRE 480 -256 224 -256 WIRE 656 -256 656 -272 WIRE 96 -240 96 -272 WIRE 224 -240 224 -256 WIRE 352 -240 352 -272 WIRE -192 -176 -288 -176 WIRE 0 -176 -192 -176 WIRE 480 -176 480 -192 WIRE 480 -176 448 -176 WIRE -288 -160 -288 -176 WIRE 592 -160 592 -272 WIRE 656 -144 656 -176 WIRE -96 -80 -112 -80 WIRE 0 -80 -16 -80 WIRE 544 -80 448 -80 WIRE -288 -64 -288 -80 WIRE 480 -64 480 -176 WIRE 0 16 -128 16 WIRE 480 16 480 0 WIRE 480 16 448 16 WIRE 592 16 592 -64 WIRE 592 16 480 16 WIRE 624 16 592 16 WIRE 736 16 704 16 WIRE 752 16 736 16 WIRE 848 16 832 16 WIRE 912 16 848 16 WIRE 1008 16 912 16 WIRE -128 32 -128 16 WIRE 592 32 592 16 WIRE 912 32 912 16 WIRE 0 112 -16 112 WIRE 544 112 448 112 WIRE 912 112 912 96 WIRE -128 128 -128 112 WIRE 592 144 592 128 WIRE -96 208 -128 208 WIRE 0 208 -32 208 WIRE 736 208 736 16 WIRE 736 208 448 208 WIRE 1008 208 1008 16 WIRE -192 304 -192 -176 WIRE -16 304 -192 304 WIRE 0 304 -16 304 WIRE 848 304 848 16 WIRE 848 304 448 304 WIRE -16 400 -16 304 WIRE 0 400 -16 400 WIRE 848 400 848 384 WIRE 848 400 448 400 WIRE 848 416 848 400 WIRE 0 496 -192 496 WIRE 848 512 848 496 WIRE 1008 512 1008 272 WIRE -192 544 -192 496 WIRE 0 592 -32 592 WIRE 960 592 448 592 WIRE 1008 640 1008 608 WIRE -192 656 -192 624 WIRE 320 688 320 656 WIRE 320 784 320 752 FLAG 656 -144 0 FLAG 656 -272 IN FLAG 592 144 0 FLAG 224 -352 0 FLAG 96 -352 0 FLAG 912 112 0 FLAG 1008 640 0 FLAG 1008 16 OUT FLAG 848 512 0 FLAG 320 784 0 FLAG -32 592 0 FLAG -112 -80 0 FLAG -16 112 0 FLAG -128 208 0 FLAG -128 128 0 FLAG -288 -64 0 FLAG -192 656 0 SYMBOL PowerProducts\\LT3743 224 208 R0 SYMATTR InstName U1 SYMBOL voltage 656 -272 R0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL nmos 544 -160 R0 SYMATTR InstName M1 SYMATTR Value Si7884DP SYMBOL nmos 544 32 R0 SYMATTR InstName M2 SYMATTR Value Si7884DP SYMBOL schottky 464 -256 R0 SYMATTR InstName D1 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 208 -272 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C1 SYMATTR Value 10µ SYMBOL cap 80 -272 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C2 SYMATTR Value 2n SYMBOL cap 464 -64 R0 SYMATTR InstName C3 SYMATTR Value .15µ SYMBOL ind 608 32 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 1.1µ SYMATTR SpiceLine Rser=15m Rpar=5K SYMBOL res 736 32 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 2.5m SYMBOL cap 896 32 R0 SYMATTR InstName C4 SYMATTR Value 1000µ SYMBOL LED 992 208 R0 SYMATTR InstName D2 SYMATTR Value PT-121-B SYMATTR Description Diode SYMATTR Type diode SYMBOL nmos 960 512 R0 SYMATTR InstName M3 SYMATTR Value IRF6620 SYMBOL res 832 400 R0 SYMATTR InstName R2 SYMATTR Value 10K SYMBOL res 832 288 R0 SYMATTR InstName R3 SYMATTR Value 60.4K SYMBOL cap 304 688 R0 WINDOW 39 27 72 Left 2 WINDOW 3 42 35 Left 2 SYMATTR SpiceLine Rser=34K SYMATTR Value 4.7n SYMATTR InstName C5 SYMBOL res 0 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 82.5K SYMBOL cap -32 192 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value .005µ SYMBOL voltage -128 16 R0 SYMATTR InstName V2 SYMATTR Value 1.5 SYMBOL voltage -288 -176 R0 SYMATTR InstName V3 SYMATTR Value 5 SYMBOL voltage -192 528 R0 WINDOW 3 29 149 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 2 1m 1u 1u .1m .3m) SYMATTR InstName V4 TEXT 624 680 Left 2 !.tran 5m startup