Version 4 SHEET 1 1780 984 WIRE -1216 -432 -1216 -448 WIRE -1072 -448 -1216 -448 WIRE -1072 -448 -1072 -464 WIRE -1072 -352 -1216 -352 WIRE -1072 -352 -1072 -368 WIRE -848 -448 -1072 -448 WIRE -848 -432 -848 -448 WIRE -848 -352 -1072 -352 WIRE -848 -352 -848 -368 WIRE -704 -448 -848 -448 WIRE -704 -352 -848 -352 WIRE -528 -448 -624 -448 WIRE -528 -432 -528 -448 WIRE -528 -352 -624 -352 WIRE -528 -352 -528 -368 WIRE -368 -448 -528 -448 WIRE -368 -448 -368 -544 WIRE -368 -352 -528 -352 WIRE -368 -256 -368 -352 WIRE -352 336 -352 -64 WIRE -352 416 -352 400 WIRE -336 -544 -368 -544 WIRE -336 -448 -368 -448 WIRE -336 -352 -368 -352 WIRE -336 -256 -368 -256 WIRE -304 416 -352 416 WIRE -304 416 -304 384 WIRE -192 384 -224 384 WIRE -192 768 -192 496 WIRE -192 896 -192 848 WIRE -176 -64 -352 -64 WIRE -160 -544 -272 -544 WIRE -160 -352 -272 -352 WIRE -160 -352 -160 -544 WIRE -144 272 -144 256 WIRE -128 336 -352 336 WIRE -128 384 -128 336 WIRE -96 256 -144 256 WIRE -80 800 -80 576 WIRE -80 896 -80 864 WIRE 0 -544 0 -560 WIRE 0 -448 -272 -448 WIRE 0 -448 0 -544 WIRE 0 -256 -272 -256 WIRE 0 -256 0 -448 WIRE 16 256 -32 256 WIRE 16 336 -128 336 WIRE 16 416 -304 416 WIRE 16 496 -192 496 WIRE 16 576 -80 576 WIRE 112 -352 -160 -352 WIRE 112 -352 112 -384 WIRE 112 -128 112 -352 WIRE 112 -16 112 -128 WIRE 112 96 112 64 WIRE 112 688 112 656 WIRE 112 800 112 768 WIRE 112 896 112 864 WIRE 160 -128 112 -128 WIRE 256 -128 240 -128 WIRE 256 -64 -96 -64 WIRE 256 -64 256 -128 WIRE 304 -544 0 -544 WIRE 304 -368 304 -544 WIRE 304 32 304 -288 WIRE 304 96 304 32 WIRE 304 896 304 656 WIRE 368 32 304 32 WIRE 464 336 400 336 WIRE 464 384 464 336 WIRE 464 496 400 496 WIRE 464 496 464 464 WIRE 480 176 400 176 WIRE 480 176 480 128 WIRE 480 192 480 176 WIRE 480 288 480 256 WIRE 496 464 464 464 WIRE 528 32 432 32 WIRE 528 288 480 288 WIRE 528 288 528 32 WIRE 528 304 528 288 WIRE 560 -544 304 -544 WIRE 576 384 544 384 WIRE 656 384 640 384 WIRE 656 416 400 416 WIRE 656 416 656 384 WIRE 656 464 576 464 WIRE 656 464 656 416 WIRE 704 128 480 128 WIRE 704 160 704 128 WIRE 704 288 528 288 WIRE 704 288 704 240 WIRE 704 336 464 336 WIRE 704 352 704 336 WIRE 704 416 656 416 WIRE 768 576 400 576 WIRE 880 -544 640 -544 WIRE 880 -544 880 -576 WIRE 880 -400 880 -544 WIRE 880 -128 256 -128 WIRE 880 -128 880 -304 WIRE 944 -320 928 -320 WIRE 944 576 848 576 WIRE 944 576 944 -320 WIRE 944 624 944 576 WIRE 944 768 944 688 WIRE 1008 576 944 576 WIRE 1024 -544 880 -544 WIRE 1136 496 464 496 WIRE 1136 496 1136 -368 WIRE 1200 -544 1088 -544 WIRE 1200 -480 1200 -544 WIRE 1200 -368 1136 -368 WIRE 1200 -368 1200 -400 WIRE 1200 -352 1200 -368 WIRE 1200 -224 1200 -272 WIRE 1200 -128 880 -128 WIRE 1200 -128 1200 -144 WIRE 1376 -544 1200 -544 WIRE 1376 -368 1376 -544 WIRE 1376 -128 1200 -128 WIRE 1376 -128 1376 -304 WIRE 1376 -80 1376 -128 WIRE 1584 -544 1376 -544 WIRE 1584 -544 1584 -560 WIRE 1696 -544 1584 -544 WIRE 1696 -352 1696 -544 WIRE 1696 -128 1376 -128 WIRE 1696 -128 1696 -272 FLAG 944 768 0 FLAG 304 896 0 FLAG 112 896 0 FLAG -80 896 0 FLAG -192 896 0 FLAG -144 272 0 FLAG 1376 -80 0 FLAG 528 304 0 FLAG -1072 -464 P FLAG -1072 -368 N FLAG 1584 -560 375V_Output FLAG 880 -576 Switch FLAG 0 -560 V+ FLAG 112 -384 V- FLAG 1008 576 Vg SYMBOL PowerProducts\\LT1248 208 416 R0 SYMATTR InstName U1 SYMBOL Misc\\EuropeanResistor 96 672 R0 SYMATTR InstName R1 SYMATTR Value 49.9K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor -208 752 R0 SYMATTR InstName R2 SYMATTR Value 15K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 864 560 R90 WINDOW 0 5 56 VBottom 0 WINDOW 3 27 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 10 SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 1184 -496 R0 SYMATTR InstName R4 SYMATTR Value 1Meg SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 1184 -368 R0 SYMATTR InstName R5 SYMATTR Value 20K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 288 -384 R0 SYMATTR InstName R6 SYMATTR Value 1Meg SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 592 448 R90 WINDOW 0 5 56 VBottom 0 WINDOW 3 27 56 VTop 0 SYMATTR InstName R7 SYMATTR Value 20K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 560 400 M270 WINDOW 0 27 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName R8 SYMATTR Value 332K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 256 -144 R90 WINDOW 0 5 56 VBottom 0 WINDOW 3 27 56 VTop 0 SYMATTR InstName R9 SYMATTR Value 0.16 SYMATTR SpiceLine tol=1 SYMBOL Misc\\EuropeanResistor -208 368 R90 WINDOW 0 5 56 VBottom 0 WINDOW 3 27 56 VTop 0 SYMATTR InstName R10 SYMATTR Value 20K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor 96 -32 R0 SYMATTR InstName R11 SYMATTR Value 4.02K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanResistor -80 -48 M270 WINDOW 0 27 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName R12 SYMATTR Value 4.02K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL Misc\\EuropeanPolcap 1360 -368 R0 SYMATTR InstName C1 SYMATTR Value 680µ SYMATTR SpiceLine V=63 Irms=1.11 Rser=0.075 MTBF=5000 Lser=0 ppPkg=1 SYMBOL Misc\\EuropeanPolcap 464 192 R0 SYMATTR InstName C2 SYMATTR Value 56µ SYMATTR SpiceLine V=35 Irms=290m Rser=0.3 MTBF=1000 Lser=0 mfg="Panasonic" pn="ECA1VFQ560" type="Al electrolytic" ppPkg=1 SYMBOL cap 96 800 R0 SYMATTR InstName C4 SYMATTR Value 10n SYMBOL cap -96 800 R0 SYMATTR InstName C5 SYMATTR Value 1000p SYMBOL cap 368 48 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C6 SYMATTR Value 4.7n SYMATTR SpiceLine V=100 SYMBOL cap -32 240 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C7 SYMATTR Value 100n SYMATTR SpiceLine V=100 SYMBOL cap -368 336 R0 WINDOW 0 -33 11 Left 0 WINDOW 3 -50 50 Left 0 SYMATTR InstName C8 SYMATTR Value 100p SYMBOL cap 576 400 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C9 SYMATTR Value 470n SYMBOL cap -128 368 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 3 -39 VTop 0 SYMATTR InstName C10 SYMATTR Value 1000p SYMBOL schottky 960 688 R180 WINDOW 0 24 72 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D1 SYMATTR Value 1N5819 SYMATTR Description Diode SYMATTR Type diode SYMBOL nmos 928 -400 M0 WINDOW 3 56 60 Left 0 SYMATTR InstName M1 SYMATTR Value SPP20N60C3 SYMATTR Prefix X SYMATTR SpiceModel VDMOS SYMBOL ind 544 -528 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L1 SYMATTR Value 750µ SYMATTR SpiceLine Ipk=2 Rser=0.17 Rpar=30000 Cpar=440f SYMBOL schottky 1024 -560 M90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D2 SYMATTR Value UPSC600 SYMBOL cap 688 352 R0 SYMATTR InstName C3 SYMATTR Value 47n SYMBOL res 1680 -368 R0 SYMATTR InstName R13 SYMATTR Value 240 SYMBOL diode -272 -560 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D3 SYMATTR Value MUR460 SYMBOL diode -336 -464 M90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D4 SYMATTR Value MUR460 SYMBOL diode -336 -240 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D5 SYMATTR Value MUR460 SYMBOL diode -272 -368 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D6 SYMATTR Value MUR460 SYMBOL ind2 -608 -368 R90 WINDOW 0 65 26 VBottom 0 WINDOW 3 35 91 VTop 0 SYMATTR InstName L2 SYMATTR Value 100µ SYMBOL ind2 -608 -432 M270 WINDOW 0 42 14 VTop 0 WINDOW 3 67 96 VBottom 0 SYMATTR InstName L3 SYMATTR Value 100µ SYMBOL cap -544 -432 R0 SYMATTR InstName C11 SYMATTR Value 1000n SYMATTR SpiceLine V=600 SYMBOL cap -864 -432 R0 SYMATTR InstName C12 SYMATTR Value 1000n SYMATTR SpiceLine V=600 SYMBOL voltage -1216 -448 R0 WINDOW 3 -7 167 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 -12 127 Left 0 SYMATTR Value SINE(0 325 50 0 0 0 1000) SYMATTR SpiceLine Rser=0 Cpar=0 SYMATTR InstName V1 SYMBOL voltage 704 144 R0 WINDOW 123 0 0 Left 0 WINDOW 39 24 132 Left 0 SYMATTR SpiceLine Rser=1 SYMATTR InstName V2 SYMATTR Value 18 SYMBOL Misc\\EuropeanResistor 1184 -240 R0 SYMATTR InstName R14 SYMATTR Value 750 TEXT -720 -536 Left 0 !K1 L2 L3 .95 TEXT -1160 864 Left 0 !.tran 0 1000ms 0 10µs TEXT -1160 968 Left 0 !.model SPP20N60C3 VDMOS(Rg=0.54 Rd=100.0m Rs=90.0m Vto=3 Kp=17.5 Cgdmax=2.4n Cgdmin=0.08n Cgs=1.0n Cjo=0.30n Is=30p Rb=90.0m mfg=Infineon Vds=600 Ron=190m Qg=30n) TEXT -1168 616 Left 0 ;This is a circuit derived from the application note in the data sheet of the LT1248 LINE Normal -592 -416 -736 -416 LINE Normal -592 -384 -592 -416 LINE Normal -736 -384 -592 -384