Version 4
SHEET 1 1196 840
WIRE 320 -64 288 -64
WIRE 416 -64 320 -64
WIRE 576 -64 480 -64
WIRE 608 -64 576 -64
WIRE 704 -64 608 -64
WIRE 928 -64 784 -64
WIRE 1088 -64 928 -64
WIRE -128 -48 -448 -48
WIRE 0 -48 -128 -48
WIRE 176 -48 0 -48
WIRE -128 0 -128 -48
WIRE 0 0 0 -48
WIRE 176 64 176 -48
WIRE 288 64 288 -64
WIRE 576 64 576 -64
WIRE 928 64 928 -64
WIRE 1088 64 1088 -64
WIRE -448 96 -448 -48
WIRE -128 96 -128 80
WIRE 0 96 0 64
WIRE 0 96 -128 96
WIRE 0 112 0 96
WIRE 0 208 0 176
WIRE 176 208 176 144
WIRE 176 208 0 208
WIRE 288 288 288 144
WIRE 576 288 576 128
WIRE 576 288 288 288
WIRE 928 288 928 128
WIRE 928 288 576 288
WIRE 1088 288 1088 144
WIRE 1088 288 928 288
WIRE 176 304 176 208
WIRE -448 320 -448 176
WIRE 176 368 176 304
WIRE 1088 384 1088 288
WIRE 48 448 32 448
WIRE 128 448 48 448
WIRE 32 512 32 448
WIRE 32 704 32 592
WIRE 176 704 176 464
FLAG -448 320 0
FLAG 1088 384 0
FLAG 176 704 0
FLAG 32 704 0
FLAG 1088 -64 Vo
FLAG 48 448 Vgate
FLAG 176 -48 vin
FLAG 608 -64 Vsw_2nd
FLAG 176 304 Vsw_1st
FLAG 320 -64 VLs
SYMBOL voltage -448 80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value {Vin}
SYMBOL ind2 160 160 M180
WINDOW 0 -49 79 Left 2
WINDOW 3 -106 23 Left 2
SYMATTR InstName Lp
SYMATTR Value 0.642mH
SYMATTR SpiceLine Rser=0.1
SYMBOL ind2 304 160 R180
WINDOW 0 -50 72 Left 2
WINDOW 3 -90 19 Left 2
SYMATTR InstName Ls
SYMATTR Value 0.395m
SYMATTR SpiceLine Rser=0.1
SYMBOL diode 416 -48 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMBOL diode 592 128 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMBOL ind 688 -48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName Lout
SYMATTR Value 150u
SYMBOL cap 912 64 R0
SYMATTR InstName Cout
SYMATTR Value 220u
SYMBOL res 1072 48 R0
SYMATTR InstName R1
SYMATTR Value {Rout}
SYMBOL nmos 128 368 R0
SYMATTR InstName M1
SYMATTR Value STN3N45K3
SYMBOL voltage 32 496 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 30 100u 50n 50n {duty} {Tsw})
SYMBOL res -144 -16 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap -16 0 R0
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL diode 16 176 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
TEXT 192 -104 Left 2 !K Lp Ls 1
TEXT -80 728 Left 2 !.tran 10m
TEXT 688 448 Left 2 !.param Iout=10
TEXT 688 480 Left 2 !.param Vout=24
TEXT 688 512 Left 2 !.param Rout=Vout/Iout
TEXT 688 544 Left 2 !.param Vin=140
TEXT 688 576 Left 2 !.param Tsw=10u
TEXT 688 608 Left 2 !.param N=1.625
TEXT 688 640 Left 2 !.param duty_per=Vout*N/Vin
TEXT 688 672 Left 2 !.param duty=Tsw*duty_per