Version 4 SHEET 1 5112 948 WIRE 1872 -496 1728 -496 WIRE 1968 -496 1872 -496 WIRE 2208 -496 1968 -496 WIRE 2800 -496 2208 -496 WIRE 2880 -496 2848 -496 WIRE 1728 -464 1728 -496 WIRE 2800 -464 2800 -496 WIRE 2848 -464 2848 -496 WIRE 1872 -448 1872 -496 WIRE 2880 -448 2880 -496 WIRE 2960 -448 2880 -448 WIRE 3152 -448 3024 -448 WIRE 3232 -448 3152 -448 WIRE 3360 -448 3232 -448 WIRE 3536 -448 3360 -448 WIRE 3152 -416 3152 -448 WIRE 3232 -416 3232 -448 WIRE 3360 -416 3360 -448 WIRE 2800 -384 2672 -384 WIRE 2336 -368 2336 -400 WIRE 1728 -352 1728 -384 WIRE 1872 -352 1872 -384 WIRE 2848 -352 2848 -384 WIRE 2208 -320 2208 -496 WIRE 3152 -304 3152 -352 WIRE 3232 -304 3232 -336 WIRE 3360 -304 3360 -336 WIRE 3504 -304 3360 -304 WIRE 3360 -288 3360 -304 WIRE 2080 -272 2080 -304 WIRE 2336 -256 2336 -288 WIRE 2464 -256 2336 -256 WIRE 2208 -224 2208 -240 WIRE 2336 -224 2336 -256 WIRE 3360 -176 3360 -208 WIRE 1968 -160 1968 -496 WIRE 2000 -160 1968 -160 WIRE 2080 -160 2080 -208 WIRE 2112 -160 2080 -160 WIRE 2480 -160 2432 -160 WIRE 2672 -160 2672 -384 WIRE 2672 -160 2560 -160 WIRE 1968 -64 1968 -160 WIRE 2000 -64 1968 -64 WIRE 2112 -64 2080 -64 WIRE 2480 -64 2432 -64 WIRE 2672 -64 2672 -160 WIRE 2672 -64 2560 -64 WIRE 2096 -48 2096 -96 WIRE 2672 -48 2672 -64 WIRE 1968 32 1968 -64 WIRE 2000 32 1968 32 WIRE 2096 32 2096 16 WIRE 2096 32 2080 32 WIRE 2112 32 2096 32 WIRE 2480 32 2432 32 WIRE 2624 32 2560 32 WIRE 1968 128 1968 32 WIRE 2000 128 1968 128 WIRE 2112 128 2080 128 WIRE 2464 128 2464 -256 WIRE 2464 128 2432 128 WIRE 2672 208 2672 48 WIRE 2672 208 2624 208 WIRE 1920 224 1840 224 WIRE 2080 224 2000 224 WIRE 2112 224 2080 224 WIRE 2496 224 2432 224 WIRE 2624 224 2624 208 WIRE 2624 224 2496 224 WIRE 2672 224 2672 208 WIRE 2080 240 2080 224 WIRE 2496 240 2496 224 WIRE 1840 272 1840 224 WIRE 2080 320 2080 304 WIRE 2080 320 2064 320 WIRE 2112 320 2080 320 WIRE 2496 320 2496 304 WIRE 2496 320 2432 320 WIRE 2672 320 2672 304 WIRE 2672 320 2496 320 WIRE 2672 352 2672 320 WIRE 1840 384 1840 352 WIRE 1968 416 1968 128 WIRE 2000 416 1968 416 WIRE 2112 416 2080 416 WIRE 2672 416 2432 416 WIRE 2832 416 2672 416 WIRE 2672 432 2672 416 WIRE 1968 512 1968 416 WIRE 2000 512 1968 512 WIRE 2112 512 2080 512 WIRE 2496 512 2432 512 WIRE 2496 544 2496 512 WIRE 2672 544 2672 496 WIRE 2272 656 2272 576 WIRE 2496 656 2496 624 WIRE 2496 656 2272 656 WIRE 2272 672 2272 656 FLAG 2848 -352 0 FLAG 2064 320 0 FLAG 2272 672 0 FLAG 2832 416 FB_Flyback FLAG 2672 544 0 FLAG 2672 352 0 FLAG 3152 -304 0 FLAG 3360 -176 0 FLAG 3504 -304 FB_Flyback FLAG 3232 -304 0 FLAG 3536 -448 OUT_Flyback FLAG 1840 384 0 FLAG 2080 -304 0 FLAG 2096 -96 0 FLAG 1728 -352 0 FLAG 1872 -352 0 FLAG 2336 -400 0 SYMBOL PowerProducts\\LT3751 2272 176 R0 SYMATTR InstName U2 SYMBOL res 2192 -336 R0 SYMATTR InstName R6 SYMATTR Value 40.2k SYMBOL res 2096 -176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R10 SYMATTR Value 100k SYMBOL res 2096 -80 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 2000k SYMBOL res 2096 16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 100k SYMBOL res 2096 112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value 2000k SYMBOL res 2576 -176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R14 SYMATTR Value 33k SYMBOL res 2576 -80 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R15 SYMATTR Value 30k SYMBOL nmos 2624 -48 R0 SYMATTR InstName Q3 SYMATTR Value IPB320N20N3 SYMBOL res 2576 16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R16 SYMATTR Value 5 SYMBOL res 2656 208 R0 SYMATTR InstName RShunt3 SYMATTR Value 4m SYMBOL ind2 2784 -480 R0 WINDOW 0 -3 41 Right 0 WINDOW 3 -3 74 Right 0 SYMATTR InstName L3 SYMATTR Value 125µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.02 SYMBOL ind2 2864 -368 R180 WINDOW 0 -1 71 Right 0 WINDOW 3 0 37 Right 0 SYMATTR InstName L4 SYMATTR Value 1.12m SYMATTR Type ind SYMATTR SpiceLine Rser=1.4 SYMBOL diode 2960 -432 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D2 SYMATTR Value RFUH60TS6D SYMBOL res 2096 400 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R17 SYMATTR Value 100k SYMBOL res 2096 496 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R18 SYMATTR Value 100k SYMBOL cap 2656 432 R0 SYMATTR InstName C15 SYMATTR Value 10n SYMBOL res 2480 640 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R19 SYMATTR Value 300 SYMBOL cap 3136 -416 R0 SYMATTR InstName C16 SYMATTR Value 470µ SYMBOL res 3344 -432 R0 SYMATTR InstName R20 SYMATTR Value 245k SYMBOL res 3344 -304 R0 SYMATTR InstName R21 SYMATTR Value 1.5k SYMBOL res 3216 -432 R0 SYMATTR InstName R22 SYMATTR Value 1k SYMBOL zener 2096 304 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMATTR Value BZX84C12L SYMATTR Description Diode SYMATTR Type diode SYMBOL res 2016 208 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R23 SYMATTR Value 10k SYMBOL voltage 1840 256 R0 WINDOW 123 24 124 Left 2 WINDOW 39 24 152 Left 2 WINDOW 3 44 80 Left 2 SYMATTR Value 13 SYMATTR InstName V2 SYMBOL cap 2480 240 R0 SYMATTR InstName C12 SYMATTR Value 10n SYMBOL cap 2064 -272 R0 SYMATTR InstName C13 SYMATTR Value 1n SYMBOL cap 2080 -48 R0 SYMATTR InstName C14 SYMATTR Value 1n SYMBOL voltage 1728 -480 R0 WINDOW 123 24 124 Left 2 WINDOW 39 24 152 Left 2 WINDOW 3 50 101 Left 2 SYMATTR Value 80 SYMATTR InstName V1 SYMBOL cap 1856 -448 R0 SYMATTR InstName C1 SYMATTR Value 200µ SYMATTR SpiceLine Rser=20m SYMBOL voltage 2336 -272 R180 WINDOW 123 24 124 Left 2 WINDOW 39 24 152 Left 2 WINDOW 3 50 101 Left 2 SYMATTR Value 18 SYMATTR InstName V3 TEXT 2832 -536 Bottom 0 !K1 L3 L4 1 TEXT -304 744 Left 2 !.tran 200m startup uic