Version 4
SHEET 1 1716 1876
WIRE 720 -1984 704 -1984
WIRE 736 -1984 720 -1984
WIRE 1072 -1968 1056 -1968
WIRE 704 -1952 704 -1984
WIRE 1072 -1952 1072 -1968
WIRE -224 -1888 -240 -1888
WIRE -128 -1888 -144 -1888
WIRE -112 -1888 -128 -1888
WIRE -32 -1888 -64 -1888
WIRE 80 -1888 48 -1888
WIRE 128 -1888 80 -1888
WIRE 256 -1888 208 -1888
WIRE -64 -1856 -64 -1888
WIRE 80 -1856 80 -1888
WIRE 1072 -1856 1072 -1872
WIRE 1072 -1856 1056 -1856
WIRE 704 -1840 704 -1872
WIRE -16 -1792 -64 -1856
WIRE 32 -1792 80 -1856
WIRE 320 -1792 256 -1888
WIRE -432 -1744 -448 -1744
WIRE -224 -1744 -432 -1744
WIRE -96 -1744 -144 -1744
WIRE -48 -1744 -96 -1744
WIRE -16 -1744 -16 -1792
WIRE -16 -1744 -48 -1744
WIRE 32 -1744 32 -1792
WIRE 48 -1744 32 -1744
WIRE 80 -1744 48 -1744
WIRE 224 -1744 160 -1744
WIRE 320 -1744 320 -1792
WIRE 320 -1744 304 -1744
WIRE 480 -1744 320 -1744
WIRE 624 -1744 560 -1744
WIRE 800 -1744 624 -1744
WIRE 880 -1744 800 -1744
WIRE 896 -1744 880 -1744
WIRE 624 -1712 624 -1744
WIRE 800 -1712 800 -1744
WIRE -432 -1696 -432 -1744
WIRE -96 -1696 -96 -1744
WIRE 880 -1632 880 -1744
WIRE 80 -1600 64 -1600
WIRE 192 -1600 160 -1600
WIRE 224 -1600 192 -1600
WIRE 336 -1600 304 -1600
WIRE 624 -1600 624 -1648
WIRE 800 -1600 800 -1632
WIRE -432 -1584 -432 -1616
WIRE -96 -1584 -96 -1616
WIRE 704 -1520 688 -1520
WIRE 800 -1520 784 -1520
WIRE 880 -1520 880 -1552
WIRE 880 -1520 800 -1520
WIRE -208 -1504 -224 -1504
WIRE -112 -1504 -128 -1504
WIRE 880 -1488 880 -1520
WIRE -224 -1472 -224 -1504
WIRE 96 -1472 64 -1472
WIRE 192 -1472 192 -1600
WIRE 192 -1472 160 -1472
WIRE 224 -1472 192 -1472
WIRE 336 -1472 304 -1472
WIRE 624 -1440 624 -1520
WIRE 656 -1440 624 -1440
WIRE 800 -1440 800 -1520
WIRE 800 -1440 720 -1440
WIRE 240 -1424 224 -1424
WIRE 464 -1424 288 -1424
WIRE 480 -1424 464 -1424
WIRE 576 -1424 560 -1424
WIRE 624 -1424 624 -1440
WIRE 624 -1424 576 -1424
WIRE 880 -1376 880 -1408
WIRE 800 -1360 800 -1440
WIRE 800 -1360 752 -1360
WIRE -224 -1344 -224 -1392
WIRE -192 -1344 -224 -1344
WIRE -96 -1344 -192 -1344
WIRE 128 -1344 48 -1344
WIRE 192 -1344 128 -1344
WIRE 224 -1344 192 -1344
WIRE 336 -1344 304 -1344
WIRE 624 -1344 624 -1424
WIRE 688 -1344 624 -1344
WIRE 800 -1328 752 -1328
WIRE -224 -1312 -224 -1344
WIRE -96 -1312 -96 -1344
WIRE 48 -1312 48 -1344
WIRE 192 -1312 192 -1344
WIRE 800 -1296 800 -1328
WIRE -224 -1216 -224 -1248
WIRE -96 -1216 -96 -1232
WIRE 48 -1216 48 -1232
WIRE 192 -1216 192 -1248
WIRE 800 -1184 800 -1216
FLAG 880 -1376 0
FLAG 624 -1600 0
FLAG 800 -1600 0
FLAG 800 -1184 0
FLAG -112 -1504 0
FLAG -224 -1504 dd
FLAG 48 -1216 0
FLAG 192 -1216 0
FLAG -96 -1216 0
FLAG -224 -1216 0
FLAG 128 -1344 ramp
FLAG -48 -1744 x
FLAG -96 -1584 0
FLAG 336 -1600 0
FLAG 64 -1472 0
FLAG 336 -1472 0
FLAG 192 -1600 di
FLAG 336 -1344 0
FLAG 48 -1744 y
FLAG -240 -1888 0
FLAG -128 -1888 Dz
FLAG -448 -1744 i
IOPIN -448 -1744 BiDir
FLAG 896 -1744 o
IOPIN 896 -1744 BiDir
FLAG 224 -1424 0
FLAG 576 -1424 err
FLAG 800 -1328 ref
FLAG 704 -1840 0
FLAG 720 -1984 Kf
FLAG -192 -1344 c
FLAG 64 -1600 0
FLAG 1072 -1968 d
FLAG 1072 -1856 dd
FLAG -432 -1584 0
FLAG 464 -1424 er
SYMBOL cap 608 -1712 R0
WINDOW 39 25 88 Left 0
WINDOW 3 40 34 Left 0
WINDOW 123 25 64 Left 0
SYMATTR SpiceLine Rser={Rc}
SYMATTR Value {C}
SYMATTR Value2 ic={Vo}
SYMATTR InstName Co
SYMBOL cap 688 -1536 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 1nF
SYMBOL cap 720 -1456 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C2
SYMATTR Value 47pF
SYMBOL voltage 800 -1312 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 16 16 Left 0
WINDOW 3 16 96 Left 0
SYMATTR InstName Vref
SYMATTR Value {Vo/2}
SYMBOL current 800 -1712 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 -36 Bottom 0
WINDOW 3 16 80 Left 0
WINDOW 0 16 0 Left 0
SYMATTR SpiceLine load
SYMATTR Value {Io}
SYMATTR InstName Io
SYMBOL Opamps\\opamp 720 -1408 M0
WINDOW 0 0 40 Bottom 0
WINDOW 3 0 96 Top 0
SYMATTR InstName X1
SYMATTR SpiceLine ""
SYMATTR SpiceLine2 ""
SYMBOL res 864 -1648 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 864 -1504 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 800 -1536 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 200k
SYMBOL bi -224 -1744 M90
WINDOW 0 -32 40 VBottom 0
WINDOW 3 48 24 VCenter 0
SYMATTR InstName Bi
SYMATTR Value I=V(d)*I(Vx)
SYMBOL bv -96 -1712 R0
WINDOW 3 -104 56 Center 0
WINDOW 0 16 16 Left 0
SYMATTR Value V=V(d)*V(i)
SYMATTR InstName Bx
SYMBOL voltage 208 -1744 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 -32 56 VBottom 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vx
SYMATTR Value 0
SYMBOL res -224 -1488 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName Rd
SYMATTR Value 1
SYMBOL bi 48 -1232 M180
WINDOW 0 16 80 Left 0
WINDOW 3 0 -80 Center 0
SYMATTR InstName BrI
SYMATTR Value I=V(i,o)/{2*f*L}
SYMBOL cap 208 -1312 M0
WINDOW 39 24 56 Left 0
WINDOW 3 8 56 Right 0
SYMATTR SpiceLine Rpar=1
SYMATTR Value 1n
SYMATTR InstName Cr
SYMBOL bi -96 -1232 R180
WINDOW 0 -16 80 Right 0
WINDOW 3 0 -48 Center 0
SYMATTR InstName BGe
SYMATTR Value I=limit(0,1,V(di)/V(ramp))
SYMBOL cap -208 -1312 M0
WINDOW 39 24 86 Left 0
WINDOW 3 24 56 Left 0
SYMATTR Value {4/pi/pi/f}
SYMATTR InstName Cd
SYMBOL ind 64 -1728 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 5 56 VBottom 0
WINDOW 39 -17 56 VBottom 0
SYMATTR InstName Lo
SYMATTR Value {L}
SYMATTR SpiceLine Rser={RL}
SYMBOL f 224 -1600 M90
WINDOW 0 -32 40 VBottom 0
WINDOW 3 32 40 VTop 0
SYMATTR InstName Ffb
SYMATTR Value Vx 1
SYMBOL cap 160 -1456 M270
WINDOW 39 56 32 VCenter 0
WINDOW 0 32 48 VRight 0
WINDOW 3 32 16 VLeft 0
SYMATTR SpiceLine Rpar=1
SYMATTR InstName Cdi
SYMATTR Value 1n
SYMBOL ind -208 -1488 M0
WINDOW 0 40 40 Left 0
WINDOW 3 40 64 Left 0
SYMATTR InstName Ld
SYMATTR Value {1/4/f}
SYMBOL bi 304 -1344 M270
WINDOW 0 32 40 VTop 0
WINDOW 3 -34 16 VBottom 0
SYMATTR InstName BrV
SYMATTR Value I=Vo/{f*L}*n
SYMBOL bv 64 -1888 R90
WINDOW 0 35 56 VTop 0
WINDOW 3 -35 56 VBottom 0
SYMATTR InstName BzV
SYMATTR Value V=V(Dz)*V(o)
SYMBOL bi 208 -1888 M270
WINDOW 0 -35 40 VBottom 0
WINDOW 3 35 40 VTop 0
SYMATTR InstName BzI
SYMATTR Value I=V(Dz)*I(Vx)
SYMBOL bv -128 -1888 M270
WINDOW 0 -35 56 VBottom 0
WINDOW 3 88 192 VLeft 0
SYMATTR InstName B_Dzero
SYMATTR Value V=if(V(c)<1,limit(0,1,1-V(d)/2*(1+V(i)/V(o))-{f*L}*I(Vx)/V(o)),0)
SYMBOL g2 208 -1472 R270
WINDOW 0 31 30 VLeft 0
WINDOW 3 33 83 VRight 0
SYMATTR InstName Gr
SYMATTR Value 1
SYMBOL bv 704 -1968 R0
WINDOW 0 16 16 Left 0
WINDOW 3 16 96 Left 0
WINDOW 123 24 120 Left 0
SYMATTR InstName Bf
SYMATTR Value V= limit(u(V(Dz)),1,
SYMATTR Value2 (V(i,o)/V(i)+n)*2 )
SYMBOL bi 80 -1600 R270
WINDOW 0 32 40 VTop 0
WINDOW 3 -32 26 VBottom 0
SYMATTR InstName Bdelay
SYMATTR Value I=V(ramp)*tx*f
SYMBOL voltage 464 -1744 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 -32 56 VBottom 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V_Io
SYMATTR Value 0
SYMBOL voltage 1072 -1968 R0
WINDOW 3 35 56 Left 0
WINDOW 123 24 96 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value 0
SYMATTR Value2 AC {1-a}
SYMATTR InstName V1
SYMBOL voltage -432 -1712 M0
WINDOW 123 0 0 Left 0
WINDOW 39 24 132 Left 0
WINDOW 3 16 96 Left 0
WINDOW 0 16 16 Left 0
SYMATTR Value 8.24
SYMATTR InstName Vi
SYMBOL voltage 576 -1424 R90
WINDOW 0 -32 56 VBottom 0
WINDOW 3 32 56 VTop 0
WINDOW 123 56 56 VTop 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 0
SYMATTR Value2 AC {a}
TEXT 992 -1736 Left 0 ;.tran 0 6m {.1/f} {1/f/5} uic
TEXT 992 -1656 Left 0 !.param f=200k L=35u C=100u\n+ RL=20m Rc=70m\n+ tx=50n; logic & drive delay
TEXT 992 -1688 Left 0 ;Buck Stage Parameters
TEXT 1024 -1552 Left 0 !.subckt opamp 1 2 3\nG1 3 0 1 2 10k\nC1 3 0 10u Rpar=10 \nD1 3 0 lim\n.model lim d Ron=1u\n+ Vfwd=2 Vrev=10m\n.ends opamp
TEXT -352 -2056 Left 0 ;Current Mode Control (averaged model - analogspiceman 2007)\nwith Discontinuous Conduction Extension (2010)
TEXT 448 -1968 Left 0 ;Discontinuous\nConduction\nAveraged\nModel\nExtension
TEXT 312 -1672 Left 0 ;Feedback\nCurrent
TEXT 312 -1536 Left 0 ;Reference\nCurrent
TEXT 256 -1256 Left 0 ;Artificial\nCurrent\nRamp\nCompensation
TEXT 48 -1360 Bottom 0 ;Natural\nRamp
TEXT -96 -1360 Bottom 0 ;Effective\nGain
TEXT -296 -1384 Center 0 ;Effective\nSampling\nDelay
TEXT -184 -1920 Bottom 0 ;Zero Duty Cycle
TEXT 992 -1256 Left 0 ;Slope Compensation Control\nn=0 is no compensation\nn=1 is 100% compensation\n (I_ramp = Lo downslope)
TEXT 768 -2032 Left 0 ;Effective Operating\nFrequency Multiplier\n(Freq Reduction Due\nto Subharmonic Osc.\nFor Reference Only)
TEXT 992 -1296 Left 0 !.param Vo=5 n=70m
TEXT 992 -1320 Left 0 ;Slope Compensation
TEXT 992 -1768 Left 0 !.ac dec 501 200 200k
TEXT -24 -1632 Left 0 ;Effective\nDelay
TEXT 1144 -1968 Left 0 ;Loop Gain\nTest Signal\nInjection
TEXT 1032 -2048 Left 0 !.step param a list 0 1\n.step param Io list .1 .3
TEXT 992 -1800 Left 0 !.op
TEXT -352 -1096 Left 0 ;NOTE: Open two plot panes, one for overall loop gain, V(dd)/V(d) and the other for voltage loop gain, V(err)/V(er).
TEXT 520 -1568 Center 0 ;V-Loop Gain\nTest Signal\nInjection
TEXT -288 -1520 Center 0 ;Duty\nCycle
LINE Normal -208 -1632 -224 -1536 2
LINE Normal 192 -1344 192 -1472 3
LINE Normal -96 -1344 48 -1344 3
LINE Normal 296 -1728 296 -1616 2
LINE Normal 232 -1728 232 -1616 2
LINE Normal -368 -1152 -368 -1808 1
LINE Normal 432 -1152 432 -1808 1
RECTANGLE Normal -512 -2080 1344 -1120
RECTANGLE Normal 432 -1808 -368 -2000 1