Version 4 SHEET 1 2260 1952 WIRE 224 -352 0 -352 WIRE 320 -352 224 -352 WIRE 224 -336 224 -352 WIRE -448 -304 -448 -352 WIRE 224 -224 224 -272 WIRE -448 -192 -448 -224 WIRE 64 -112 64 -144 WIRE -64 32 -64 0 WIRE 352 48 224 48 WIRE 528 48 416 48 WIRE 656 48 528 48 WIRE 800 48 656 48 WIRE 864 48 800 48 WIRE -80 80 -272 80 WIRE 16 80 0 80 WIRE 64 80 64 -32 WIRE 64 80 16 80 WIRE 128 80 64 80 WIRE 656 80 656 48 WIRE 128 96 128 80 WIRE 224 96 224 48 WIRE 256 96 224 96 WIRE 352 96 288 96 WIRE 416 96 416 48 WIRE 800 96 800 48 WIRE 528 112 528 48 WIRE -736 160 -800 160 WIRE -656 160 -736 160 WIRE -384 160 -576 160 WIRE -272 160 -272 80 WIRE -272 160 -384 160 WIRE -736 192 -736 160 WIRE 528 192 528 176 WIRE 128 208 128 176 WIRE 128 208 0 208 WIRE 224 208 224 176 WIRE 448 208 224 208 WIRE 528 208 528 192 WIRE -384 224 -384 160 WIRE 128 224 128 208 WIRE 224 224 224 208 WIRE 256 304 256 96 WIRE 352 304 256 304 WIRE -384 336 -384 304 WIRE -272 336 -272 160 WIRE -80 336 -272 336 WIRE 16 336 0 336 WIRE 48 336 16 336 WIRE 128 336 128 304 WIRE 128 336 48 336 WIRE 224 336 224 304 WIRE 288 336 288 96 WIRE 288 336 224 336 WIRE 224 352 224 336 WIRE 352 352 224 352 WIRE 416 352 416 304 WIRE 528 352 528 272 WIRE 528 352 416 352 WIRE -64 416 -64 384 WIRE 48 416 48 336 WIRE 448 496 384 496 WIRE 848 496 448 496 WIRE 1024 496 928 496 WIRE 1344 496 1344 480 WIRE 1344 496 1024 496 WIRE 1760 496 1344 496 WIRE 48 512 48 496 WIRE 1344 512 1344 496 WIRE 1760 528 1760 496 WIRE 1280 560 1248 560 WIRE 1696 576 1664 576 WIRE 448 608 448 496 WIRE 1344 656 1344 608 WIRE 1408 656 1344 656 WIRE 1760 656 1760 624 WIRE 1856 656 1760 656 WIRE 1248 672 1248 560 WIRE 1248 672 640 672 WIRE 1344 688 1344 656 WIRE 1664 688 1664 576 WIRE 1664 688 1584 688 WIRE 1760 688 1760 656 WIRE 368 736 224 736 WIRE 448 736 448 688 WIRE 448 736 368 736 WIRE 1248 736 1248 672 WIRE 1280 736 1248 736 WIRE 1664 736 1664 688 WIRE 1696 736 1664 736 WIRE 368 752 368 736 WIRE 448 752 448 736 WIRE 640 752 640 672 WIRE 448 816 368 816 WIRE 1344 832 1344 784 WIRE 224 864 224 736 WIRE 224 864 0 864 WIRE 448 880 448 816 WIRE 1344 928 1344 912 WIRE 1760 928 1760 784 WIRE 1760 928 1344 928 WIRE 1056 944 672 944 WIRE 1344 944 1344 928 WIRE 224 1008 224 864 WIRE 1056 1024 1056 944 WIRE 1584 1024 1584 688 WIRE 1584 1024 1056 1024 WIRE 0 1056 0 864 WIRE 48 1056 0 1056 WIRE 640 1056 640 832 WIRE 640 1056 384 1056 WIRE -192 1120 -272 1120 WIRE 48 1120 -192 1120 WIRE 672 1120 672 1024 WIRE 672 1120 384 1120 WIRE 48 1184 -112 1184 WIRE 432 1184 384 1184 WIRE 1632 1232 1616 1232 WIRE 1776 1232 1712 1232 WIRE 2080 1232 1840 1232 WIRE 48 1248 16 1248 WIRE 720 1248 384 1248 WIRE -112 1264 -112 1184 WIRE -112 1264 -224 1264 WIRE 2192 1264 2192 1216 WIRE 720 1296 720 1248 WIRE -224 1312 -224 1264 WIRE 48 1312 -80 1312 WIRE 416 1312 384 1312 WIRE -80 1328 -80 1312 WIRE 128 1376 128 1360 WIRE 976 1376 976 1344 WIRE 1616 1376 1616 1232 WIRE 1616 1376 1472 1376 WIRE 1696 1376 1616 1376 WIRE 2080 1376 2080 1232 WIRE 2080 1376 1952 1376 WIRE 2192 1376 2192 1344 WIRE 2192 1376 2080 1376 WIRE 416 1392 416 1312 WIRE 448 1392 416 1392 WIRE 2192 1392 2192 1376 WIRE 224 1408 224 1360 WIRE 304 1408 224 1408 WIRE 320 1408 320 1360 WIRE 320 1408 304 1408 WIRE 416 1408 416 1392 WIRE 416 1408 320 1408 WIRE -224 1424 -224 1392 WIRE -144 1424 -224 1424 WIRE -80 1424 -80 1392 WIRE -80 1424 -144 1424 WIRE 448 1424 448 1392 WIRE -144 1456 -144 1424 WIRE 128 1456 128 1440 WIRE 128 1456 -144 1456 WIRE 304 1456 304 1408 WIRE 128 1472 128 1456 WIRE 1696 1504 1664 1504 WIRE 2000 1504 1952 1504 WIRE 976 1520 976 1456 WIRE 1024 1520 976 1520 WIRE 1296 1520 1296 1440 WIRE 1296 1520 1216 1520 WIRE 2000 1568 2000 1504 WIRE 2000 1568 1952 1568 WIRE 1024 1616 976 1616 WIRE 1280 1616 1216 1616 WIRE 1280 1648 1280 1616 WIRE 2000 1680 2000 1568 WIRE 976 1728 976 1616 WIRE 1472 1728 1472 1376 WIRE 1472 1728 976 1728 FLAG -384 336 0 FLAG 432 1184 CS FLAG -272 1120 VRef FLAG -192 1184 0 FLAG 304 1456 0 FLAG 128 1472 0 FLAG 720 1168 VRef FLAG 1344 480 15v FLAG 864 48 FB FLAG 1408 656 GateA FLAG 1344 944 0 FLAG 1856 656 GateB FLAG 1024 560 0 FLAG 448 880 0 FLAG 384 496 12v FLAG 0 208 smps_in FLAG -448 -192 0 FLAG -448 -352 12v FLAG 224 -224 0 FLAG 320 -352 smps_in FLAG 720 1296 COMP FLAG 1296 1440 COMP FLAG 1280 1648 0 FLAG 976 1344 12v FLAG 1664 1504 12v FLAG 2000 1680 0 FLAG 2192 1472 0 FLAG 2192 1216 FB FLAG -80 -352 12v FLAG 48 576 smps_in FLAG 64 -208 smps_in FLAG -64 496 GateA FLAG -64 -80 GateB FLAG 448 208 0 FLAG 16 1248 VRef FLAG -800 160 CS FLAG -736 256 0 FLAG 528 192 0 FLAG 800 176 0 FLAG -736 80 VRef SYMBOL ind2 144 192 R180 WINDOW 0 36 80 Left 2 WINDOW 3 20 98 VRight 2 SYMATTR InstName L1 SYMATTR Value 144550n SYMATTR Type ind SYMATTR SpiceLine Rser=0.011 SYMBOL ind2 144 320 R180 WINDOW 0 36 80 Left 2 WINDOW 3 19 -101 VRight 2 SYMATTR InstName L2 SYMATTR Value 144550n SYMATTR Type ind SYMATTR SpiceLine Rser=0.011 SYMBOL ind2 240 192 R180 WINDOW 0 36 80 Left 2 WINDOW 3 25 148 VRight 2 SYMATTR InstName L3 SYMATTR Value 4259800n SYMATTR Type ind SYMATTR SpiceLine Rser=0.144 SYMBOL schottky 352 64 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 132 44 VBottom 2 SYMATTR InstName D1 SYMATTR Value MBR20100CT SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 352 112 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D2 SYMATTR Value MBR20100CT SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 416 336 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D3 SYMATTR Value MBR20100CT SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 416 288 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D4 SYMATTR Value MBR20100CT SYMATTR Description Diode SYMATTR Type diode SYMBOL polcap 512 112 R0 WINDOW 3 24 56 Left 2 SYMATTR InstName C1 SYMATTR Value 3300µ SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine Rser=28m Lser=0 mfg=" ---" pn=" ---" type=" ---" SYMBOL nmos 16 32 R90 WINDOW 3 23 96 VRight 2 SYMATTR Value IRF1010N SYMATTR InstName M1 SYMBOL nmos 16 384 M270 WINDOW 3 17 257 VLeft 2 SYMATTR Value IRF1010N SYMATTR InstName M2 SYMBOL LTC3721-1 224 1184 R0 SYMATTR InstName U1 SYMBOL cap -208 1120 R0 SYMATTR InstName C3 SYMATTR Value 100n SYMBOL cap -96 1328 R0 SYMATTR InstName C4 SYMATTR Value 68n SYMBOL cap 112 1376 R0 SYMATTR InstName C5 SYMATTR Value 675p SYMBOL res -240 1296 R0 SYMATTR InstName R4 SYMATTR Value 50k SYMBOL res 704 1152 R0 SYMATTR InstName R5 SYMATTR Value 100k SYMBOL npn 1280 512 R0 SYMATTR InstName Q2 SYMATTR Value 2SCR542P SYMBOL pnp 1280 784 M180 SYMATTR InstName Q3 SYMATTR Value 2SAR542P SYMBOL res 1328 816 R0 SYMATTR InstName R7 SYMATTR Value 0.0001 SYMBOL pnp 1696 784 M180 SYMATTR InstName Q4 SYMATTR Value 2SAR542P SYMBOL npn 1696 528 R0 SYMATTR InstName Q5 SYMATTR Value 2SCR542P SYMBOL res -400 208 R0 SYMATTR InstName R3 SYMATTR Value 0.01 SYMBOL cap 1008 496 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMATTR SpiceLine Rser=13.3m Lser=0 mfg="KEMET" pn="C1206C105K3RAC" type="X7R" SYMBOL res 944 480 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 10 SYMBOL cap 384 816 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C6 SYMATTR Value 100n SYMATTR SpiceLine Rser=85m Lser=0 mfg="KEMET" pn="C1206F104K4RAC" type="X7R" SYMBOL cap 464 816 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C7 SYMATTR Value 10µ SYMATTR SpiceLine Rser=4.2m Lser=0 mfg="KEMET" pn="C1206C106K4RAC" type="X7R" SYMBOL res 432 592 R0 SYMATTR InstName R8 SYMATTR Value 10 SYMBOL res 624 736 R0 SYMATTR InstName R9 SYMATTR Value 100 SYMBOL res 656 928 R0 SYMATTR InstName R11 SYMATTR Value 100 SYMBOL voltage -448 -320 R0 SYMATTR InstName V1 SYMATTR Value 12v SYMBOL cap 208 -336 R0 SYMATTR InstName C8 SYMATTR Value 10000µ SYMBOL References/LT1431 1824 1472 R0 SYMATTR InstName U2 SYMBOL Optos/PC817B 1120 1568 R0 SYMATTR InstName U3 SYMBOL res 960 1360 R0 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL res 2176 1248 R0 SYMATTR InstName R12 SYMATTR Value 17k SYMBOL res 2176 1376 R0 SYMATTR InstName R13 SYMATTR Value 1k SYMBOL res 1728 1216 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R14 SYMATTR Value 10k SYMBOL cap 1840 1216 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C9 SYMATTR Value 100n SYMBOL res 32 400 R0 SYMATTR InstName R15 SYMATTR Value 60 SYMBOL res 48 -128 R0 SYMATTR InstName R16 SYMATTR Value 60 SYMBOL cap 32 512 R0 SYMATTR InstName C10 SYMATTR Value 1µ SYMBOL cap 48 -208 R0 SYMATTR InstName C11 SYMATTR Value 1µ SYMBOL res -80 400 R0 SYMATTR InstName R17 SYMATTR Value 10 SYMBOL res -80 -96 R0 SYMATTR InstName R18 SYMATTR Value 10 SYMBOL res 16 -368 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 0.001 SYMBOL ind2 240 320 R180 WINDOW 0 36 80 Left 2 WINDOW 3 28 -175 VRight 2 SYMATTR InstName L4 SYMATTR Value 4259800n SYMATTR Type ind SYMATTR SpiceLine Rser=0.144 SYMBOL polcap 512 208 R0 WINDOW 3 24 56 Left 2 SYMATTR InstName C12 SYMATTR Value 3300µ SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine Rser=28m Lser=0 mfg=" ---" pn=" ---" type=" ---" SYMBOL cap -752 192 R0 SYMATTR InstName C13 SYMATTR Value 100n SYMBOL res -560 144 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R10 SYMATTR Value 1k SYMBOL current 800 96 R0 SYMATTR InstName I1 SYMATTR Value PULSE(0 3 150m 100n 100n 0.01 0.02) SYMATTR SpiceLine load SYMBOL res -752 64 R0 SYMATTR InstName R19 SYMATTR Value 75k TEXT -856 -192 Left 2 !K L1 L2 L3 L4 0.9999 TEXT -344 408 Left 2 !.tran 10s