Version 4
SHEET 1 1148 1528
WIRE 112 32 48 32
WIRE 224 32 224 16
WIRE 224 32 176 32
WIRE 288 32 224 32
WIRE 368 32 288 32
WIRE 544 32 448 32
WIRE 704 32 544 32
WIRE 752 32 752 0
WIRE 752 32 704 32
WIRE 544 48 544 32
WIRE -352 64 -416 64
WIRE -256 64 -288 64
WIRE -192 64 -256 64
WIRE -32 64 -192 64
WIRE 752 64 752 32
WIRE -416 80 -416 64
WIRE -256 80 -256 64
WIRE -32 80 -32 64
WIRE 48 80 48 32
WIRE 224 80 224 32
WIRE 288 80 288 32
WIRE 384 96 384 80
WIRE 384 96 352 96
WIRE 704 96 640 96
WIRE 704 112 704 96
WIRE 352 128 352 96
WIRE -416 176 -416 160
WIRE -256 176 -256 144
WIRE -256 176 -416 176
WIRE -176 176 -256 176
WIRE -32 176 -32 160
WIRE -32 176 -80 176
WIRE 48 176 48 160
WIRE 224 176 224 144
WIRE 224 176 48 176
WIRE 288 176 288 144
WIRE 288 176 224 176
WIRE 544 176 288 176
WIRE 640 176 544 176
WIRE 704 176 640 176
WIRE 752 176 752 144
WIRE 752 176 704 176
WIRE 224 192 224 176
WIRE -416 208 -416 176
WIRE 384 208 384 96
WIRE -160 256 -160 224
WIRE -160 256 -256 256
WIRE 432 288 432 80
WIRE 432 288 384 288
WIRE -192 368 -192 64
WIRE -144 368 -192 368
WIRE 240 368 -144 368
WIRE 480 368 240 368
WIRE 208 400 -80 400
WIRE 480 448 480 368
WIRE -48 464 -112 464
WIRE 240 464 240 368
WIRE 240 464 176 464
WIRE -80 528 -80 400
WIRE -48 528 -80 528
WIRE 320 528 176 528
WIRE 480 528 320 528
WIRE 320 576 320 528
WIRE 480 576 480 528
WIRE -112 592 -112 464
WIRE -48 592 -80 592
WIRE 208 592 208 400
WIRE 208 592 176 592
WIRE 240 592 208 592
WIRE -144 656 -144 368
WIRE -48 656 -144 656
WIRE 208 656 176 656
WIRE 320 688 320 640
WIRE 480 688 480 640
WIRE -256 720 -256 256
WIRE -80 720 -80 592
WIRE -80 720 -256 720
WIRE 240 736 240 592
WIRE 400 736 400 688
WIRE 400 736 240 736
WIRE 400 752 400 736
WIRE 208 768 208 656
WIRE -80 784 -80 720
WIRE 208 848 208 832
WIRE 400 848 400 816
FLAG 224 192 0
FLAG -416 64 Vin
FLAG 224 16 Vcap
FLAG -416 208 0
FLAG 352 128 0
FLAG 752 0 Vselector
FLAG 208 848 0
FLAG 400 848 0
FLAG -80 784 Vtout
FLAG -112 592 0
SYMBOL cap 272 80 R0
WINDOW 3 28 59 Left 2
SYMATTR Value 1µF
SYMATTR InstName C1
SYMATTR SpiceLine V=300
SYMBOL ind2 32 176 M180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L1
SYMATTR Value 1000µH
SYMATTR Type ind
SYMATTR SpiceLine Rser=1.60
SYMBOL ind2 -48 64 R0
SYMATTR InstName L2
SYMATTR Value 10µH
SYMATTR Type ind
SYMATTR SpiceLine Ipk=3 Rser=0.013
SYMBOL diode 112 48 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MURS120
SYMBOL voltage -416 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=0.5
SYMATTR InstName V2
SYMATTR Value 4.5
SYMBOL cap -272 80 R0
SYMATTR InstName C2
SYMATTR Value 220µF
SYMATTR SpiceLine V=10V
SYMBOL schottky -352 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value MBRS140
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL sw 352 32 R270
SYMATTR InstName S2
SYMATTR Value ""
SYMATTR SpiceModel SW1
SYMBOL voltage 384 304 M180
WINDOW 3 -190 -21 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 -122 58 Left 2
WINDOW 0 -59 23 Left 2
SYMATTR Value PULSE(0 5 20ms 0.5us 0.6us 22ms 44ms 20)
SYMATTR SpiceLine Rser=1
SYMATTR InstName V3
SYMBOL ind 736 48 R0
SYMATTR InstName L3
SYMATTR Value 4H
SYMATTR SpiceLine Ipk=100mA Rser=55 Rpar=1000000
SYMBOL zener 240 144 R180
WINDOW 0 24 64 Left 2
WINDOW 3 20 -16 Left 2
SYMATTR InstName D4
SYMATTR Value 1N5380BG
SYMBOL nmos -80 224 M270
WINDOW 3 -21 68 VLeft 2
SYMATTR Value IRL3915
SYMATTR InstName M2
SYMBOL Misc\\NE555 64 560 R0
SYMATTR InstName U1
SYMBOL res 464 432 R0
SYMATTR InstName R2
SYMATTR Value 4.7K
SYMBOL diode 304 576 R0
WINDOW 3 42 35 Left 2
SYMATTR Value 1N4148
SYMATTR InstName D3
SYMBOL diode 496 640 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -88 29 Left 2
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL cap 384 752 R0
SYMATTR InstName C4
SYMATTR Value 270p
SYMBOL cap 192 768 R0
SYMATTR InstName C5
SYMATTR Value 0.1µF
SYMBOL res 416 672 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 496 672 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 90k
SYMBOL zener 560 112 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D6
SYMATTR Value 1N5380BG
SYMBOL diode 528 112 R0
SYMATTR InstName D8
SYMATTR Value MURS120
SYMBOL diode 720 96 R180
WINDOW 0 24 64 Left 2
WINDOW 3 29 25 Left 2
SYMATTR InstName D9
SYMATTR Value MURS120
SYMBOL cap 688 112 R0
WINDOW 3 28 59 Left 2
SYMATTR Value 2.2n
SYMATTR InstName C6
SYMATTR SpiceLine V=300 Rser=100u
SYMBOL res 624 80 R0
SYMATTR InstName R7
SYMATTR Value 2k
TEXT -48 200 Left 2 !K1 L1 L2 0.995
TEXT -368 1048 Left 2 !.tran 100ms
TEXT -376 984 Left 2 !.model SW1 SW(Ron=1 Roff=10Meg Vt=1.1 Vh=0.1)
TEXT -120 8 Left 2 ;Coilcraft DA2032-AL
TEXT -376 1016 Left 2 !.model 1N5380BG D(bv=120v ibv=1ma mfg=OnSemi type=Zener)
TEXT -296 888 Left 2 ;Draws about 150 milliamps or 0.8 watts