Version 4 SHEET 1 1528 1268 WIRE -32 -32 -160 -32 WIRE 128 -32 -32 -32 WIRE 688 -32 128 -32 WIRE 976 -32 816 -32 WIRE 1120 -32 1040 -32 WIRE 1360 -32 1120 -32 WIRE 1392 -32 1392 -80 WIRE 1392 -32 1360 -32 WIRE 1440 -32 1392 -32 WIRE 368 0 288 0 WIRE 560 0 368 0 WIRE 1120 16 1120 -32 WIRE 1440 16 1440 -32 WIRE -32 48 -32 -32 WIRE 128 48 128 -32 WIRE 560 48 560 0 WIRE 688 48 688 -32 WIRE 816 48 816 -32 WIRE 288 64 288 0 WIRE -32 160 -32 112 WIRE 816 160 816 128 WIRE 1008 160 816 160 WIRE 1120 160 1120 80 WIRE 1120 160 1008 160 WIRE -160 192 -160 -32 WIRE 128 192 128 128 WIRE 560 192 560 128 WIRE 560 192 128 192 WIRE 1008 192 1008 160 WIRE 1440 192 1440 96 WIRE 128 208 128 192 WIRE 368 240 368 0 WIRE 688 240 688 128 WIRE 688 240 560 240 WIRE 688 272 688 240 WIRE -160 320 -160 272 WIRE 560 320 560 240 WIRE 128 336 128 272 WIRE 288 368 288 128 WIRE 368 368 368 320 WIRE 368 368 288 368 WIRE 384 368 368 368 WIRE 496 368 464 368 WIRE 688 400 688 352 WIRE 288 432 288 368 WIRE 1232 432 1024 432 WIRE 1360 432 1360 -32 WIRE 1360 432 1232 432 WIRE 288 544 288 496 WIRE 560 544 560 416 WIRE 560 544 288 544 WIRE 624 544 560 544 WIRE 688 544 688 464 WIRE 688 544 624 544 WIRE 1024 560 1024 432 WIRE 1232 560 1232 432 WIRE 624 592 624 544 WIRE 1360 704 1360 432 WIRE 368 720 368 368 WIRE 544 720 368 720 WIRE 784 720 544 720 WIRE 1024 720 1024 640 WIRE 1024 720 976 720 WIRE 544 768 544 720 WIRE 656 816 608 816 WIRE 784 816 736 816 WIRE 1232 816 1232 640 WIRE 1232 816 976 816 WIRE 544 928 544 864 WIRE 1232 944 1232 816 WIRE 1360 992 1360 784 WIRE 1360 992 1280 992 WIRE 1360 1056 1360 992 WIRE 1232 1200 1232 1040 WIRE 1360 1200 1360 1136 WIRE 1360 1200 1232 1200 WIRE 1232 1248 1232 1200 FLAG -160 320 0 FLAG 624 592 0 FLAG 1008 192 0 FLAG 1440 192 0 FLAG 128 336 0 FLAG -32 160 0 FLAG 1232 1248 0 FLAG 1392 -80 Out FLAG 544 928 0 SYMBOL voltage -160 176 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 4.4R SYMBOL ind2 672 32 R0 SYMATTR InstName L1 SYMATTR Value 100µH SYMATTR Type ind SYMBOL npn 496 320 R0 SYMATTR InstName Q1 SYMATTR Value 2N2222 SYMBOL res 672 256 R0 SYMATTR InstName R1 SYMATTR Value 2R SYMBOL cap 672 400 R0 SYMATTR InstName C1 SYMATTR Value 100nF SYMBOL ind2 832 144 R180 WINDOW 0 36 80 Left 2 WINDOW 3 -84 28 Left 2 SYMATTR InstName L2 SYMATTR Value 576µH SYMATTR Type ind SYMBOL schottky 976 -16 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value MBRS340 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 1104 16 R0 SYMATTR InstName C2 SYMATTR Value 47µF SYMATTR SpiceLine Rser=0.05 SYMBOL res 1424 0 R0 SYMATTR InstName R2 SYMATTR Value 20R SYMBOL ind2 544 32 R0 SYMATTR InstName L3 SYMATTR Value 100µH SYMATTR Type ind SYMBOL res 112 32 R0 SYMATTR InstName R3 SYMATTR Value 1K SYMBOL cap 112 208 R0 SYMATTR InstName C3 SYMATTR Value 100nF SYMBOL diode 304 496 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL res 352 224 R0 SYMATTR InstName R5 SYMATTR Value 220R SYMBOL cap 272 64 R0 SYMATTR InstName C4 SYMATTR Value 1µF SYMBOL cap -48 48 R0 SYMATTR InstName C5 SYMATTR Value 47µF SYMATTR SpiceLine Rser=0.05 SYMBOL Optos\\PC817A 880 768 M0 SYMATTR InstName U1 SYMBOL Voltage\ Regulators\\TL431 1232 992 M0 SYMATTR InstName U2 SYMBOL res 1344 688 R0 SYMATTR InstName R6 SYMATTR Value 1K SYMBOL res 1344 1040 R0 SYMATTR InstName R7 SYMATTR Value 1K SYMBOL res 1216 544 R0 SYMATTR InstName R8 SYMATTR Value 1K SYMBOL res 1008 544 R0 SYMATTR InstName R9 SYMATTR Value 330R SYMBOL npn 608 768 M0 SYMATTR InstName Q2 SYMATTR Value BC817-25 SYMBOL res 752 800 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R10 SYMATTR Value 270R SYMBOL res 480 352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 4.7R TEXT 640 -80 Left 2 !K L1 L2 L3 0.98 TEXT -160 616 Left 2 !.tran 0 5ms 500µs 2µs startup uic