Version 4 SHEET 1 5945676 13421556 WIRE 3088 -336 3056 -336 WIRE 3168 -336 3152 -336 WIRE 2992 -320 2992 -336 WIRE 3168 -320 3168 -336 WIRE 3008 -256 2992 -256 WIRE 3088 -256 3072 -256 WIRE 3168 -240 3168 -256 WIRE 3008 -192 2992 -192 WIRE 3088 -192 3088 -256 WIRE 3088 -192 3072 -192 WIRE 2176 -128 2016 -128 WIRE 2368 -128 2176 -128 WIRE 2560 -128 2368 -128 WIRE 2672 -128 2560 -128 WIRE 2800 -128 2672 -128 WIRE 2992 -128 2992 -192 WIRE 3008 -128 2992 -128 WIRE 3088 -128 3072 -128 WIRE 2016 -112 2016 -128 WIRE 2560 -112 2560 -128 WIRE 2672 -112 2672 -128 WIRE 2176 -96 2176 -128 WIRE 2800 -64 2800 -128 WIRE 2864 -64 2800 -64 WIRE 2960 -64 2928 -64 WIRE 3008 -64 2960 -64 WIRE 3088 -64 3088 -128 WIRE 3088 -64 3072 -64 WIRE 3168 -64 3168 -112 WIRE 3216 -64 3168 -64 WIRE 3344 -64 3296 -64 WIRE 3440 -64 3344 -64 WIRE 3504 -64 3440 -64 WIRE 3552 -64 3504 -64 WIRE 2368 -48 2368 -128 WIRE 2864 -48 2864 -64 WIRE 2928 -48 2928 -64 WIRE 3168 -48 3168 -64 WIRE 3344 -48 3344 -64 WIRE 3552 -48 3552 -64 WIRE 2016 -16 2016 -32 WIRE 2560 -16 2560 -48 WIRE 2672 -16 2672 -32 WIRE 2672 -16 2560 -16 WIRE 2672 16 2672 -16 WIRE 2864 48 2864 32 WIRE 2864 48 2800 48 WIRE 2928 48 2928 32 WIRE 3168 48 3168 16 WIRE 3168 48 2928 48 WIRE 3344 48 3344 16 WIRE 3344 48 3168 48 WIRE 3552 48 3552 32 WIRE 3552 48 3344 48 WIRE 2672 96 2672 80 WIRE 2800 96 2800 48 WIRE 2800 96 2672 96 WIRE 3440 96 3440 -64 WIRE 1936 112 1808 112 WIRE 2176 112 2176 -16 WIRE 2176 112 2000 112 WIRE 3552 112 3552 48 WIRE 1808 176 1808 112 WIRE 2176 272 2176 112 WIRE 2400 272 2176 272 WIRE 4336 272 2400 272 WIRE 2400 288 2400 272 WIRE 3440 288 3440 176 WIRE 3440 288 3248 288 WIRE 4016 288 3440 288 WIRE 1904 304 1600 304 WIRE 2000 304 1904 304 WIRE 4016 304 4016 288 WIRE 4336 304 4336 272 WIRE 2176 336 2176 272 WIRE 3504 336 3504 -64 WIRE 2672 352 2672 96 WIRE 2400 368 2400 352 WIRE 2000 400 2000 304 WIRE 2016 400 2000 400 WIRE 4016 400 4016 384 WIRE 4064 400 4016 400 WIRE 4336 400 4336 384 WIRE 4336 400 4256 400 WIRE 2416 432 2336 432 WIRE 2464 432 2416 432 WIRE 2624 432 2544 432 WIRE 1600 464 1600 304 WIRE 1600 464 1312 464 WIRE 1776 464 1600 464 WIRE 2016 464 1856 464 WIRE 3504 496 3504 416 WIRE 3760 496 3504 496 WIRE 4048 496 3840 496 WIRE 4064 496 4048 496 WIRE 4336 496 4256 496 WIRE 1536 528 1424 528 WIRE 2016 528 1536 528 WIRE 1536 544 1536 528 WIRE 1424 560 1424 528 WIRE 2368 560 2368 32 WIRE 2368 560 2336 560 WIRE 2480 560 2368 560 WIRE 2672 560 2672 448 WIRE 2672 560 2560 560 WIRE 3248 560 3248 288 WIRE 3328 560 3248 560 WIRE 3712 560 3328 560 WIRE 3728 560 3712 560 WIRE 2368 576 2368 560 WIRE 2672 576 2672 560 WIRE 2016 592 2000 592 WIRE 4048 592 4048 496 WIRE 1536 624 1536 608 WIRE 1312 656 1312 464 WIRE 3712 656 3712 560 WIRE 3504 672 3504 496 WIRE 3536 672 3504 672 WIRE 3680 672 3536 672 WIRE 1424 688 1424 640 WIRE 1904 688 1424 688 WIRE 2000 688 2000 592 WIRE 2000 688 1904 688 WIRE 4048 688 4048 592 WIRE 4048 688 3744 688 WIRE 1424 704 1424 688 WIRE 2176 704 2176 656 WIRE 2368 704 2368 640 WIRE 2672 704 2672 656 WIRE 3248 704 3248 560 WIRE 3328 704 3328 560 WIRE 3680 704 3632 704 WIRE 3712 720 3712 704 WIRE 3504 752 3504 672 WIRE 3632 752 3632 704 WIRE 3248 768 3248 752 WIRE 1312 784 1312 736 WIRE 1424 784 1424 768 WIRE 3632 896 3632 832 WIRE 3632 912 3632 896 WIRE 3712 912 3712 720 WIRE 3712 912 3632 912 WIRE 3248 1008 3248 768 WIRE 3328 1008 3328 768 WIRE 3504 1008 3504 832 WIRE 3632 1008 3632 912 WIRE 1600 1056 1600 464 WIRE 4336 1056 4336 496 WIRE 4336 1056 1600 1056 FLAG 2672 704 0 FLAG 1424 784 0 FLAG 1536 624 0 FLAG 2176 704 0 FLAG 2400 368 0 FLAG 2016 -16 0 FLAG 3552 -64 OUT FLAG 3552 112 0 FLAG 2016 -128 IN FLAG 2368 704 0 FLAG 1312 784 0 FLAG 1904 304 FB FLAG 1904 688 Rt/Ct FLAG 2416 432 Output FLAG 2960 -64 Usek FLAG 3504 1008 0 FLAG 1808 176 0 FLAG 3328 1008 0 FLAG 3248 1008 0 FLAG 3728 560 V+ FLAG 4048 592 Coll FLAG 3632 896 GND-S FLAG 3536 672 Ref FLAG 3632 1008 0 SYMBOL RES 2656 560 R0 SYMATTR InstName R1 SYMATTR Value 0.12 SYMBOL cap 1408 704 R0 SYMATTR InstName C1 SYMATTR Value 1.5n SYMBOL cap 1520 544 R0 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL res 1408 544 R0 SYMATTR InstName R3 SYMATTR Value 11K SYMBOL res 2576 544 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 500 SYMBOL NMOS 2624 352 R0 SYMATTR InstName Q1 SYMATTR Value STW11NM80 SYMBOL res 2560 416 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 12 SYMBOL cap 2384 288 R0 SYMATTR InstName C6 SYMATTR Value 22µ SYMBOL res 2352 -64 R0 SYMATTR InstName R9 SYMATTR Value 1.32Meg SYMBOL res 2656 -128 R0 SYMATTR InstName R10 SYMATTR Value 660K SYMBOL cap 2544 -112 R0 SYMATTR InstName C7 SYMATTR Value 470p SYMBOL ind2 2944 -64 M0 WINDOW 0 1 32 Right 2 WINDOW 3 1 60 Right 2 SYMATTR InstName L1 SYMATTR Value 23m SYMBOL ind2 2848 48 M180 WINDOW 0 -4 79 Right 2 WINDOW 3 -3 42 Right 2 SYMATTR InstName L3 SYMATTR Value 258µ SYMBOL cap 3152 -48 R0 SYMATTR InstName C8 SYMATTR Value 200n SYMBOL ind2 3200 -48 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L4 SYMATTR Value 5µ SYMATTR Type ind SYMATTR SpiceLine Rpar=100 SYMBOL polcap 3328 -48 R0 SYMATTR InstName C9 SYMATTR Value 0.1n SYMBOL VOLTAGE 2016 -128 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 325 SYMBOL diode 2656 80 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D5 SYMATTR Value MURS320 SYMBOL res 2160 -112 R0 SYMATTR InstName R13 SYMATTR Value 150k SYMBOL PowerProducts\\LT1244 2176 496 R0 SYMATTR InstName U1 SYMBOL cap 2352 576 R0 SYMATTR InstName C10 SYMATTR Value 50p SYMBOL res 3536 -64 R0 SYMATTR InstName R11 SYMATTR Value =R11 SYMBOL res 3488 320 R0 SYMATTR InstName R4 SYMATTR Value 10Meg SYMBOL Optos\\PC817A 4160 448 R0 SYMATTR InstName U2 SYMBOL diode 3008 -80 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMATTR Value RFN5TF8S SYMBOL res 1872 448 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R14 SYMATTR Value 500k SYMBOL res 1296 640 R0 SYMATTR InstName R8 SYMATTR Value 20k SYMBOL res 3488 736 R0 SYMATTR InstName R7 SYMATTR Value 10k SYMBOL diode 3072 -144 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D4 SYMATTR Value RFN5TF8S SYMBOL diode 3008 -176 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D6 SYMATTR Value RFN5TF8S SYMBOL diode 3072 -272 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D7 SYMATTR Value RFN5TF8S SYMBOL diode 2992 -320 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D8 SYMATTR Value RFN5TF8S SYMBOL diode 3152 -320 R0 SYMATTR InstName D12 SYMATTR Value RFN5TF8S SYMBOL zener 1936 128 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D3 SYMATTR Value EDZV16B SYMATTR Description Diode SYMATTR Type diode SYMBOL res 3856 480 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 20k SYMBOL cap 3312 704 R0 SYMATTR InstName C4 SYMATTR Value 200n SYMBOL diode 3152 -176 R0 SYMATTR InstName D10 SYMATTR Value RFN5TF8S SYMBOL diode 3152 -240 R0 SYMATTR InstName D11 SYMATTR Value RFN5TF8S SYMBOL diode 3088 -320 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D2 SYMATTR Value RFN5TF8S SYMBOL diode 3008 -256 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D13 SYMATTR Value RFN5TF8S SYMBOL res 3424 80 R0 SYMATTR InstName R15 SYMATTR Value 228k SYMBOL zener 3264 768 R180 WINDOW 0 60 39 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D9 SYMATTR Value EDZV36B SYMATTR Description Diode SYMATTR Type diode SYMBOL res 4320 288 R0 SYMATTR InstName R12 SYMATTR Value 5.7k SYMBOL res 4000 288 R0 SYMATTR InstName R16 SYMATTR Value 150k SYMBOL Opamps\\LT1001 3712 624 R0 SYMATTR InstName U4 SYMBOL voltage 3632 736 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 2.5 TEXT 2472 736 Left 2 !.tran 30m TEXT 2872 -72 Bottom 2 !K1 L1 L3 1 TEXT 2560 -144 Bottom 2 ;LT1244 - High Speed Current Mode Pulse Width Modulators\n50kHz TEXT 2912 96 Left 2 !.step param R11 list 80000k 1000000k 2000000k LINE Normal 2896 304 2896 -64 2