Version 4.1
SHEET 1 4480 2340
WIRE 1008 -656 848 -656
WIRE 1104 -656 1008 -656
WIRE 848 -576 848 -656
WIRE -96 -560 -304 -560
WIRE -448 -544 -544 -544
WIRE -304 -528 -304 -560
WIRE -544 -512 -544 -544
WIRE 848 -464 848 -496
WIRE 464 -448 208 -448
WIRE 208 -432 208 -448
WIRE -544 -384 -544 -432
WIRE -304 -384 -304 -448
WIRE -304 -384 -544 -384
WIRE -544 -368 -544 -384
WIRE 208 -336 208 -352
WIRE 1104 -336 1104 -656
WIRE 912 -320 816 -320
WIRE 1008 -320 1008 -352
WIRE 1008 -320 992 -320
WIRE 1024 -320 1008 -320
WIRE 816 -256 816 -320
WIRE 1024 -256 1024 -320
WIRE 1056 -256 1024 -256
WIRE -96 -240 -96 -560
WIRE 80 -240 -96 -240
WIRE 464 -240 464 -448
WIRE 480 -240 464 -240
WIRE 624 -224 560 -224
WIRE 768 -224 624 -224
WIRE 464 -208 464 -240
WIRE 1104 -208 1104 -240
WIRE 400 -160 352 -160
WIRE 816 -96 816 -176
WIRE 1104 -96 1104 -128
WIRE 1104 -96 816 -96
WIRE -272 -80 -352 -80
WIRE -256 -80 -272 -80
WIRE 464 -80 464 -112
WIRE 560 -80 560 -224
WIRE 560 -80 464 -80
WIRE -352 -64 -352 -80
WIRE 464 -48 464 -80
WIRE 272 -32 224 -32
WIRE 1104 -32 1104 -96
WIRE 1200 -32 1104 -32
WIRE 1392 -32 1200 -32
WIRE 1520 -32 1472 -32
WIRE 1648 -32 1520 -32
WIRE 1776 -32 1648 -32
WIRE 1856 -32 1776 -32
WIRE 2032 -32 1856 -32
WIRE 272 -16 240 -16
WIRE 368 -16 336 -16
WIRE 368 0 368 -16
WIRE 400 0 368 0
WIRE -256 16 -256 -80
WIRE -240 16 -256 16
WIRE 352 16 352 -160
WIRE 352 16 336 16
WIRE -352 48 -352 16
WIRE 496 48 464 48
WIRE -256 64 -256 16
WIRE -240 64 -240 16
WIRE 1520 64 1520 -32
WIRE 1648 64 1648 -32
WIRE 1776 64 1776 -32
WIRE 2032 64 2032 -32
WIRE -544 80 -640 80
WIRE -288 80 -544 80
WIRE -176 96 -224 96
WIRE 80 96 80 -240
WIRE 112 96 80 96
WIRE -448 112 -448 -544
WIRE -352 112 -448 112
WIRE -288 112 -352 112
WIRE 112 112 80 112
WIRE 224 112 224 -32
WIRE 224 112 176 112
WIRE 1104 128 1104 -32
WIRE -352 144 -352 112
WIRE -352 144 -416 144
WIRE -48 144 -192 144
WIRE 80 144 80 112
WIRE 80 144 48 144
WIRE 208 144 176 144
WIRE 480 144 480 -240
WIRE -272 160 -272 128
WIRE -272 160 -304 160
WIRE -256 160 -256 128
WIRE -256 160 -272 160
WIRE -240 160 -240 128
WIRE -240 160 -256 160
WIRE -192 176 -192 144
WIRE 1648 176 1648 144
WIRE 1648 176 1632 176
WIRE -96 192 -96 -240
WIRE -48 192 -96 192
WIRE 416 192 352 192
WIRE -640 208 -640 80
WIRE 880 208 848 208
WIRE 992 208 992 176
WIRE 992 208 960 208
WIRE 1056 208 992 208
WIRE 208 224 208 144
WIRE 272 224 208 224
WIRE 1648 224 1648 176
WIRE 272 240 256 240
WIRE 368 240 336 240
WIRE 1104 256 1104 224
WIRE -304 272 -304 160
WIRE -256 272 -304 272
WIRE -192 272 -192 256
WIRE -192 272 -256 272
WIRE 352 272 352 192
WIRE 352 272 336 272
WIRE 480 288 480 240
WIRE 624 288 480 288
WIRE 672 288 624 288
WIRE 848 288 848 208
WIRE -256 304 -256 272
WIRE -640 320 -640 288
WIRE 480 336 480 288
WIRE 368 384 368 240
WIRE 416 384 368 384
WIRE 848 400 848 368
WIRE 1104 400 1104 336
WIRE 1104 400 848 400
WIRE 1520 416 1520 128
WIRE 1552 416 1520 416
WIRE 1648 416 1648 288
WIRE 1648 416 1552 416
WIRE 1776 416 1776 144
WIRE 1776 416 1648 416
WIRE 2032 416 2032 144
WIRE 2032 416 1776 416
WIRE 1552 432 1552 416
WIRE 1104 448 1104 400
WIRE 480 464 480 432
WIRE 480 464 432 464
WIRE 496 464 496 48
WIRE 496 464 480 464
WIRE 432 496 432 464
FLAG -416 144 sawtooth
FLAG -544 -368 0
FLAG 432 496 0
FLAG 208 -336 0
FLAG 624 288 output_B
FLAG 848 -464 0
FLAG 1104 448 0
FLAG 1200 -32 fet_center
FLAG 1008 -352 up_gate
FLAG 992 176 low_gate
FLAG 1552 432 0
FLAG -256 304 0
FLAG -176 96 PWM
FLAG -544 80 set_duty
FLAG -272 -80 5V
FLAG 624 -224 output_A
FLAG -640 320 0
FLAG 1856 -32 DC-with_AC_supply
FLAG 1632 176 damper
FLAG 1008 -656 DC_supply
FLAG -352 48 0
SYMBOL Digital\\or 304 -64 R0
WINDOW 39 -8 36 Left 2
SYMATTR SpiceLine Vhigh=10
SYMATTR InstName A1
SYMBOL Digital\\or 304 192 R0
WINDOW 39 -8 36 Left 2
SYMATTR SpiceLine Vhigh=10
SYMATTR InstName A2
SYMBOL Digital\\srflop 0 96 R0
WINDOW 39 -40 28 Left 2
SYMATTR SpiceLine Vhigh=10
SYMATTR InstName A3
SYMBOL voltage -544 -528 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -113 122 Left 2
SYMATTR Value PULSE(0 1 0 9.7u 0.1u 0.1u 10u)
SYMATTR InstName V1
SYMBOL Digital\\or 144 64 R0
WINDOW 39 -8 36 Left 2
SYMATTR SpiceLine Vhigh=10
SYMATTR InstName A4
SYMBOL voltage -352 -80 R0
SYMATTR InstName V2
SYMATTR Value 5V
SYMBOL npn 400 -208 R0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL npn 400 -48 R0
SYMATTR InstName Q2
SYMATTR Value 2N2222
SYMBOL npn 416 144 R0
SYMATTR InstName Q3
SYMATTR Value 2N2222
SYMBOL npn 416 336 R0
SYMATTR InstName Q4
SYMATTR Value 2N2222
SYMBOL voltage -304 -544 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -57 102 Left 2
SYMATTR Value PULSE(0 5 9.85u 10n 10n 0.1u 10u)
SYMATTR InstName V3
SYMBOL voltage 208 -448 R0
SYMATTR InstName V5
SYMATTR Value 10
SYMBOL nmos 1056 -336 R0
SYMATTR InstName M1
SYMATTR Value BSC077N12NS3
SYMBOL nmos 1056 128 R0
SYMATTR InstName M2
SYMATTR Value BSC077N12NS3
SYMBOL bv 816 -272 R0
SYMATTR InstName B3
SYMATTR Value V=V(output_A)
SYMBOL bv 848 272 R0
SYMATTR InstName B4
SYMATTR Value V=V(output_B)
SYMBOL res 1008 -336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10R
SYMBOL res 976 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10R
SYMBOL voltage 848 -592 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -110 96 Left 2
SYMATTR Value PULSE(0 48 1u 100u 1u 1E8 2E8)
SYMATTR InstName V4
SYMBOL ind 1376 -48 M90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName L4
SYMATTR Value 10µ
SYMATTR SpiceLine Rser=1m
SYMBOL cap 1504 64 R0
SYMATTR InstName C4
SYMATTR Value 10µ
SYMBOL res 1760 48 R0
SYMATTR InstName R7
SYMATTR Value 100R
SYMBOL res 1088 -224 R0
SYMATTR InstName R_Isense_up
SYMATTR Value 1m
SYMBOL res 1088 240 R0
SYMATTR InstName R_Isense_down
SYMATTR Value 1m
SYMBOL Comparators\\LT1719 -256 32 R0
SYMATTR InstName U3
SYMBOL bv -192 160 R0
SYMATTR InstName B1
SYMATTR Value V=2*V(PWM)
SYMBOL cap 1632 224 R0
SYMATTR InstName C6
SYMATTR Value 33µ
SYMBOL res 1632 48 R0
SYMATTR InstName R14
SYMATTR Value 100R
SYMBOL voltage -640 192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V6
SYMATTR Value SINE(0.5 0.2 1k)
SYMBOL res 2016 48 R0
SYMATTR InstName R_Load
SYMATTR Value 1R
TEXT -504 -664 Left 2 ;oscillator
TEXT -2352 448 Left 2 !.tran 0 12m 2m 10n
TEXT 656 -296 Left 2 ;gate drive isolation\neg pulse transformer
TEXT 672 232 Left 2 ;gate drive isolation\neg pulse transformer
TEXT -2488 -944 Left 4 ;click on run\nthen click on the "set_duty" net, to plot its voltage waveform\nclick on the plot window, then click on plot settings/add plot pane.\nclick on the net "fet_center"\nyou can zoom the time in and out to see the waveform detail\nclick on the plot window, then click on plot settings/add plot pane.\nclick on the net "DC-with_AC_supply"\nclick on the plot window, then click on plot settings/add plot pane.\nclick on the component "L4" to plot its current.\nclick on the plot window, then click on plot settings/add plot pane.\nyou may also wish to plot "sawtooth", "output_A", and "output_B" \nto get a fuller understanding of this DC+AC output SMPS.
TEXT -2480 -1056 Left 5 ;Instructions, DC+AC output SMPS cct block
TEXT -2360 480 Left 2 !.ic V(P4_Css)=0
TEXT -2480 -1600 Left 5 ;neccessary changes to settings to make this simulation run.\nin the upper menu, click on /simulate/settings\nchange Gmin to 1E-9\nchange abstol to 1E-9\nchange chgtol to 1E-11
TEXT -320 -736 Left 4 ;DC+AC SMPS control circuit
TEXT -2208 -1720 Left 6 ;AC motor drive type SMPS as an AM modulated power supply for an RF oscillator
TEXT -2344 528 Left 2 !.model pwr_diode D(Ron=1m Roff=1Meg Vfwd=.4)
TEXT -2352 576 Left 2 !.model Sw_kw1 SW(Ron=.01 Roff=100Meg Vt=4 Vh=-1)
TEXT -2512 -264 Left 4 ;We set the duty by comparing the node "set_duty" with the node "sawtooth", \nthe "sawtooth" goes from 0V to 1V, \nwith the node "set_duty" at 0V is 0% duty, at 0.5V is 50% duty, and at 1V is 100% duty.\n \nAs node "DC_supply" is 48V, then with 100% duty the output voltage will be 48V,\nwe use a Dc voltagde of 0.5V on "sawtooth" setting a DC output voltage at 0.5 x 48V = 24V.\nthere is a 0.2V peak 1khz AC superimposed on this 0.5V dc, so a peak of 0.7V, \nand a trough of 0.3V, \ncorresponding to duties of 70% and 30%, and \na peak output voltage of 0.7 x 48V=33.6V\na trough output voltage of 0.3 x 48V=14.4V
TEXT -2496 -328 Left 5 ;Circuit description
TEXT 120 -992 Left 5 ;DC+AC SMPS circuit
TEXT 944 -720 Left 4 ;DC+AC SMPS power circuit
TEXT 1592 -216 Left 3 ;This circuit still has some switching \nfreq Voltage ripple on the output.\ndepending on the application more \noutput filtering may be required.
RECTANGLE Normal 640 -768 -720 528 2
RECTANGLE Normal 1904 592 -832 -880 2
RECTANGLE Normal 1856 528 736 -768 2