Version 4 SHEET 1 1556 772 WIRE 272 48 208 48 WIRE 368 48 272 48 WIRE 464 48 368 48 WIRE 656 48 544 48 WIRE 208 64 208 48 WIRE 368 128 368 48 WIRE -80 144 -160 144 WIRE 80 144 -16 144 WIRE 112 144 80 144 WIRE 160 144 112 144 WIRE -160 160 -160 144 WIRE 848 160 736 160 WIRE 896 160 848 160 WIRE 208 176 208 160 WIRE 80 192 80 144 WIRE 656 224 656 48 WIRE 736 256 736 160 WIRE 736 256 720 256 WIRE 848 256 848 160 WIRE 208 272 208 256 WIRE 208 272 144 272 WIRE 208 288 208 272 WIRE -160 304 -160 240 WIRE 80 304 80 256 WIRE 144 304 144 272 WIRE 656 304 544 304 WIRE 208 384 208 368 WIRE -80 400 -160 400 WIRE 80 400 -16 400 WIRE 112 400 80 400 WIRE 160 400 112 400 WIRE -160 432 -160 400 WIRE 80 432 80 400 WIRE 720 448 720 336 WIRE 848 448 848 336 WIRE 208 480 208 464 WIRE 208 496 208 480 WIRE 272 496 208 496 WIRE 368 496 368 416 WIRE 368 496 272 496 WIRE 464 496 368 496 WIRE 656 496 656 384 WIRE 656 496 544 496 WIRE 80 512 80 496 WIRE -16 592 -160 592 WIRE 32 592 -16 592 WIRE 256 592 112 592 WIRE 512 592 336 592 WIRE -16 624 -16 592 FLAG -160 304 0 FLAG 720 448 0 FLAG 896 160 Vout IOPIN 896 160 Out FLAG -160 672 0 FLAG 112 144 Vg1 FLAG 112 400 Vg2 FLAG 272 48 Vd1 IOPIN 272 48 BiDir FLAG 272 496 Vd2 IOPIN 272 496 BiDir FLAG 848 448 0 FLAG 512 592 Vcc IOPIN 512 592 Out FLAG 544 304 Vcc IOPIN 544 304 Out FLAG -160 512 0 FLAG 368 192 0 FLAG 368 352 0 FLAG 144 304 0 FLAG 80 304 0 FLAG 80 512 0 FLAG -16 688 0 FLAG -160 592 Vdd SYMBOL ind 448 64 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 1.43u SYMATTR SpiceLine Ipk=10 Rser=0.01 SYMBOL ind 128 608 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L6 SYMATTR Value 54.7u SYMATTR SpiceLine Ipk=20 SYMBOL 2SK2232 160 64 R0 SYMATTR InstName M1 SYMBOL 2SK2232 160 480 M180 SYMATTR InstName M2 SYMBOL voltage -160 144 R0 WINDOW 3 -590 -27 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 5 5u 10n 10n 1.05263u 2.105263u 100) SYMATTR InstName V1 SYMBOL voltage -160 416 R0 WINDOW 3 -591 -54 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(5 0 5u 10n 10n 1.05263u 2.105263u 100) SYMATTR InstName V2 SYMBOL voltage -160 576 R0 WINDOW 0 43 39 Left 2 WINDOW 3 42 95 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value 13.8 SYMBOL Misc\\EuropeanCap 352 128 R0 SYMATTR InstName C1 SYMATTR Value 18.35n SYMBOL Misc\\EuropeanCap 352 352 R0 WINDOW 3 28 64 Left 2 SYMATTR Value 18.35n SYMATTR InstName C2 SYMBOL Misc\\EuropeanResistor 832 240 R0 SYMATTR InstName R1 SYMATTR Value 50 SYMATTR SpiceLine pwr=100 SYMBOL ind2 640 208 R0 WINDOW 0 -79 31 Left 2 WINDOW 3 -80 79 Left 2 SYMATTR InstName L3 SYMATTR Value 20u SYMATTR SpiceLine Ipk=10 Rser=10m SYMBOL ind2 640 288 R0 WINDOW 0 -78 34 Left 2 WINDOW 3 -80 83 Left 2 SYMATTR InstName L4 SYMATTR Value 20u SYMATTR SpiceLine Ipk=10 Rser=10m SYMBOL ind2 736 240 M0 WINDOW 0 -44 15 Left 2 WINDOW 3 -63 92 Left 2 SYMATTR InstName L5 SYMATTR Value 635u SYMATTR SpiceLine Ipk=10 Rser=10m SYMBOL Misc\\EuropeanResistor 192 160 R0 SYMATTR InstName R2 SYMATTR Value 0.1m SYMATTR SpiceLine pwr=50 SYMBOL Misc\\EuropeanResistor 192 272 R0 SYMATTR InstName R3 SYMATTR Value 0.1m SYMATTR SpiceLine pwr=50 SYMBOL ind 448 512 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 1.43u SYMATTR SpiceLine Ipk=10 Rser=0.01 SYMBOL Misc\\EuropeanResistor 352 576 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 0.1m SYMATTR SpiceLine pwr=100 SYMBOL diode 96 256 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value 1SS380VM SYMBOL diode 96 496 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value 1SS380VM SYMBOL Misc\\EuropeanCap -16 128 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 100n SYMBOL Misc\\EuropeanCap -16 384 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 100n SYMBOL Misc\\EuropeanPolcap -32 624 R0 SYMATTR InstName C5 SYMATTR Value 100u TEXT 48 -96 Left 2 !.tran 0 100u 95u 5 TEXT -752 -56 Left 2 !.model 2sk2232 VDMOS(Rg=3 Rd=10m Rs=0 Rb=0 Vto=1.6 Kp=10 Cgdmax=.2n Cgdmin=.2n Cgs=1n Cjo=.3n Is=0.01m Ron=36m Qg=38n lambda=0.005) TEXT 560 264 Left 2 ;4t TEXT 560 344 Left 2 ;4t TEXT 752 288 Left 2 ;23t TEXT 672 128 Left 2 !K1 L3 L4 L5 1 TEXT 424 -16 Left 2 ;(T80#2)*10t, (AL100=55) TEXT 424 544 Left 2 ;(T80#2)*10t, (AL100=55) TEXT 896 120 Left 2 ;pp150V makes 56W TEXT 672 72 Left 2 ;4*FT114#77, (AL1000=1365) TEXT 152 568 Left 2 ;7A TEXT 440 648 Left 2 ;Efficiency = 56W /( 13.8V * 4.2A ) = 96% TEXT 440 680 Left 2 ;Designed by JA6SOQ on July 2nd 2021 TEXT -56 288 Left 2 ;for 1ss470 TEXT -64 520 Left 2 ;for 1ss470 TEXT 40 656 Left 2 ;FT114#77 *20t, (AL100=1350) TEXT -752 -32 Left 2 ;Where Freq=475kHz, Q=5, Vdd=13.8V, P=65W, PAI=3.141592654,\nR=8/(PAI^2+4)*(Vdd^2/P=1.69[Ohm]\nC1=C2=8/(PAI*(PAI^2+4))*(1/(2*PAI*Freq*R))=36.7[nF] ==> 36.7/2=18.35[nF]\nL1=L2=R*Q/(2*PAI*Freq)=2.86[uH] ==>2.86/2=1.43[uH] TEXT 400 160 Left 2 ;C1/2 TEXT 408 384 Left 2 ;C2/2 TEXT -752 392 Left 2 ;Output Transformer Variation\nM C1&C2[nF] L1&L2[uH] PWR[W]\n1 18.35 1.43 56\n0.99 18.35 1.43 30\n0.98 18.35 1.2 20\n0.97 18.35 0.7 20\n0.96 16 0.7 16\n0.95 14.5 0.5 10\n0.94 13 0.5 7.8\n0.93 11 0.5 6.3\n0.92 105 0.5 4.4\n0.91 9 0.5 4.4\n0.90 8.5 0.5 3.2 TEXT 480 104 Left 2 ;L1/2 TEXT 480 432 Left 2 ;L2/2