Version 4 SHEET 1 1444 824 WIRE 1008 -688 976 -688 WIRE 1136 -688 1088 -688 WIRE 1232 -688 1200 -688 WIRE -528 -576 -528 -624 WIRE -528 -576 -624 -576 WIRE -432 -576 -528 -576 WIRE -272 -576 -272 -624 WIRE -272 -576 -352 -576 WIRE 128 -576 -272 -576 WIRE 528 -576 128 -576 WIRE 688 -576 528 -576 WIRE 784 -576 688 -576 WIRE 976 -576 976 -688 WIRE 1056 -576 976 -576 WIRE 1232 -576 1232 -688 WIRE 1232 -576 1120 -576 WIRE 1424 -576 1232 -576 WIRE 528 -544 528 -576 WIRE 688 -544 688 -576 WIRE 528 -448 528 -464 WIRE 640 -448 528 -448 WIRE 688 -448 688 -480 WIRE 688 -448 640 -448 WIRE 784 -432 784 -576 WIRE 784 -432 704 -432 WIRE 128 -416 128 -576 WIRE 704 -384 704 -432 WIRE 368 -352 256 -352 WIRE 976 -352 976 -576 WIRE 784 -336 784 -432 WIRE 368 -320 368 -352 WIRE 640 -304 640 -448 WIRE 1232 -304 1232 -576 WIRE 704 -288 704 -320 WIRE 368 -208 368 -240 WIRE 640 -208 640 -240 WIRE 704 -208 640 -208 WIRE 784 -208 784 -256 WIRE 784 -208 704 -208 WIRE 208 -192 208 -224 WIRE 256 -192 256 -352 WIRE 256 -192 208 -192 WIRE 528 -160 432 -160 WIRE 784 -160 784 -208 WIRE 784 -160 608 -160 WIRE 128 -144 128 -336 WIRE 256 -144 256 -192 WIRE -448 -80 -496 -80 WIRE -320 -80 -368 -80 WIRE -176 -80 -320 -80 WIRE -128 -80 -176 -80 WIRE 32 -80 -48 -80 WIRE 432 -80 432 -160 WIRE 432 -80 352 -80 WIRE -496 -48 -496 -80 WIRE 528 -32 464 -32 WIRE 784 -32 784 -160 WIRE 784 -32 608 -32 WIRE 976 -32 976 -272 WIRE 1136 -32 976 -32 WIRE 1232 -32 1232 -240 WIRE 1232 -32 1136 -32 WIRE 1136 0 1136 -32 WIRE -176 16 -176 -80 WIRE -176 16 -272 16 WIRE -96 16 -176 16 WIRE 32 16 -16 16 WIRE 464 16 464 -32 WIRE 464 16 352 16 WIRE 784 32 784 -32 WIRE -624 96 -624 -576 WIRE -272 112 -272 16 WIRE -224 112 -272 112 WIRE 32 112 -144 112 WIRE 560 112 352 112 WIRE 688 112 640 112 WIRE 736 112 688 112 WIRE 688 160 688 112 WIRE -272 208 -272 112 WIRE -96 208 -272 208 WIRE 32 208 -16 208 WIRE 464 208 496 160 WIRE 464 208 352 208 WIRE 688 272 688 240 WIRE -320 304 -320 -80 WIRE 32 304 -320 304 WIRE 512 304 352 304 WIRE 560 304 512 304 WIRE 784 304 784 128 WIRE 784 304 640 304 WIRE 512 336 512 304 WIRE 784 352 784 304 WIRE 32 400 -96 400 WIRE 464 400 352 400 WIRE -96 416 -96 400 WIRE 512 432 512 400 WIRE 464 496 352 496 WIRE 464 512 464 496 WIRE 464 592 352 592 WIRE 560 592 464 592 WIRE 464 656 464 592 WIRE 560 672 560 592 WIRE -624 752 -624 176 WIRE 192 752 192 656 WIRE 192 752 -624 752 WIRE 464 752 464 736 WIRE 464 752 192 752 WIRE 496 752 464 752 WIRE 560 752 560 736 WIRE 560 752 496 752 WIRE 784 752 784 432 WIRE 784 752 560 752 WIRE 192 784 192 752 WIRE 496 784 496 752 FLAG 688 272 0 FLAG 368 -208 0 FLAG 208 -224 VCC FLAG 192 784 0 FLAG -496 -48 0 FLAG 496 784 0 FLAG 464 512 0 FLAG 464 400 0 FLAG 1136 0 0 FLAG 496 160 VCC FLAG -528 -624 VIN1 FLAG -272 -624 vin FLAG -96 416 0 FLAG 512 432 0 SYMBOL PowerProducts\\LT3751 192 256 R0 SYMATTR InstName U1 SYMBOL nmos 736 32 R0 WINDOW 3 -103 -29 Left 2 SYMATTR Value IPP075N15N3 SYMATTR InstName M1 SYMBOL res 656 96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 0.1 SYMBOL voltage 368 -336 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 44 Left 2 SYMATTR SpiceLine Rser=0.01 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage -352 -80 R90 WINDOW 0 -106 53 VBottom 2 WINDOW 3 32 56 VTop 2 WINDOW 123 0 0 Left 2 WINDOW 39 -65 63 VBottom 2 SYMATTR InstName V2 SYMATTR Value 12 SYMATTR SpiceLine Rser=0.1 SYMBOL res 448 640 R0 SYMATTR InstName R3 SYMATTR Value 1268 SYMBOL cap 544 672 R0 SYMATTR InstName C1 SYMATTR Value 10p SYMATTR SpiceLine Rser=0.03 SYMBOL res 768 336 R0 SYMATTR InstName R4 SYMATTR Value 0.006 SYMBOL schottky 1056 -560 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value UPSC600 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 624 -176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 18k SYMBOL res 624 -48 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 39K SYMBOL voltage -624 80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 124 Left 2 SYMATTR SpiceLine Rser=0.001 SYMATTR InstName V3 SYMATTR Value 12 SYMBOL cap 1216 -304 R0 SYMATTR InstName C2 SYMATTR Value 4µ SYMATTR SpiceLine Rser=0.03 SYMBOL res 112 -432 R0 SYMATTR InstName R7 SYMATTR Value 39k SYMBOL res -448 -560 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R10 SYMATTR Value 0.000001 SYMBOL schottky 656 -240 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value UPSC600 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 672 -544 R0 SYMATTR InstName C5 SYMATTR Value 10n SYMATTR SpiceLine Rser=0.03 SYMBOL res 512 -560 R0 SYMATTR InstName R11 SYMATTR Value 10k SYMBOL res 1104 -704 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R8 SYMATTR Value 100 SYMBOL cap 1200 -704 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 100p SYMATTR SpiceLine Rser=0.03 SYMBOL res 656 288 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 100 SYMBOL cap 496 336 R0 SYMATTR InstName C6 SYMATTR Value 1000p SYMATTR SpiceLine Rser=0.03 SYMBOL res -32 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 200k SYMBOL res 0 0 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value 400k SYMBOL res -128 96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R14 SYMATTR Value 200k SYMBOL res 0 192 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R15 SYMATTR Value 400k SYMBOL ind2 768 -352 R0 SYMATTR InstName L1 SYMATTR Value 6µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.001 SYMBOL ind2 992 -256 R180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L2 SYMATTR Value 598µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.001 SYMBOL res 672 144 R0 SYMATTR InstName R1 SYMATTR Value 33K SYMBOL res 688 -304 R0 SYMATTR InstName R16 SYMATTR Value 2 SYMBOL cap 688 -384 R0 SYMATTR InstName C4 SYMATTR Value 10n SYMATTR SpiceLine Rser=0.03 TEXT 480 -688 Left 5 !K L1 L2 0.995 TEXT -656 808 Left 2 !.tran 0 40m 0 startup uic TEXT 104 -896 Left 5 ;Flyback capacitor charger TEXT 1280 -608 Left 4 ;to 300V TEXT -792 -616 Left 5 ;Vin=12V