Version 4
SHEET 1 1356 2912
WIRE 144 -368 0 -368
WIRE 400 -368 208 -368
WIRE 0 -256 0 -368
WIRE 0 -256 -464 -256
WIRE 48 -256 0 -256
WIRE 400 -256 400 -368
WIRE 400 -256 304 -256
WIRE 400 -208 400 -256
WIRE 48 -176 -336 -176
WIRE 352 -176 304 -176
WIRE 48 -96 0 -96
WIRE 400 -96 400 -144
WIRE 400 -96 304 -96
WIRE 0 -64 0 -96
WIRE 352 16 352 -176
WIRE -64 64 -176 64
WIRE 80 64 0 64
WIRE 208 64 160 64
WIRE 272 64 208 64
WIRE 400 64 400 -96
WIRE 400 64 368 64
WIRE 464 64 400 64
WIRE 528 64 464 64
WIRE 672 64 608 64
WIRE 800 64 672 64
WIRE -464 112 -464 -256
WIRE -336 112 -336 -176
WIRE -176 112 -176 64
WIRE 208 128 208 64
WIRE 672 128 672 64
WIRE 800 128 800 64
WIRE 464 144 464 64
WIRE -464 256 -464 192
WIRE -336 256 -336 192
WIRE -336 256 -464 256
WIRE -176 256 -176 192
WIRE -176 256 -336 256
WIRE 208 256 208 192
WIRE 208 256 -176 256
WIRE 464 256 464 208
WIRE 464 256 208 256
WIRE 672 256 672 192
WIRE 672 256 464 256
WIRE 800 256 800 208
WIRE 800 256 672 256
WIRE -464 272 -464 256
FLAG 0 -64 0
FLAG -464 272 0
SYMBOL voltage -176 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=0
SYMATTR InstName V1
SYMATTR Value 48
SYMBOL nmos 272 16 M90
SYMATTR InstName M1
SYMATTR Value IRF1407
SYMBOL schottky 480 208 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value MBR20100CT
SYMBOL ind 512 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 25µ
SYMATTR SpiceLine Ipk=0 Rser=0 Rpar=0 Cpar=0
SYMBOL polcap 656 128 R0
WINDOW 3 24 56 Left 2
SYMATTR Value 470µ
SYMATTR InstName C1
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=63 Irms=1.78 Rser=0.065 Lser=0 mfg="Panasonic" pn="ECA1JFQ471L" type="Al electrolytic"
SYMBOL voltage -336 96 R0
WINDOW 3 -73 181 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 15 100u 0 0 10u 17u 150)
SYMATTR InstName V2_PWM
SYMBOL Misc\\EuropeanResistor 784 112 R0
SYMATTR InstName R2
SYMATTR Value 0.25
SYMBOL PowerProducts\\LTC4440 176 -176 R0
SYMATTR InstName U1
SYMBOL schottky -64 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D3
SYMATTR Value MBR20100CT
SYMBOL ind 64 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 25µ
SYMATTR SpiceLine Ipk=0 Rser=0 Rpar=0 Cpar=0
SYMBOL polcap 192 128 R0
WINDOW 3 24 56 Left 2
SYMATTR Value 470µ
SYMATTR InstName C3
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=63 Irms=1.78 Rser=0.065 Lser=0 mfg="Panasonic" pn="ECA1JFQ471L" type="Al electrolytic"
SYMBOL polcap 384 -208 R0
WINDOW 3 24 56 Left 2
SYMATTR Value 22µ
SYMATTR InstName C2
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=100 Irms=0.2
SYMBOL schottky 144 -352 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value MBR20100CT
SYMBOL voltage -464 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V2
SYMATTR Value 12
TEXT -512 312 Left 2 !.tran 4m