Version 4 SHEET 1 1688 948 WIRE -464 -544 -464 -576 WIRE -464 896 -464 864 WIRE -432 -576 -464 -576 WIRE -432 896 -464 896 WIRE -304 -256 -352 -256 WIRE -304 -224 -304 -256 WIRE -304 -112 -304 -144 WIRE -304 -48 -352 -48 WIRE -304 -32 -304 -48 WIRE -304 64 -304 32 WIRE -304 192 -352 192 WIRE -304 224 -304 192 WIRE -304 320 -304 288 WIRE -304 496 -368 496 WIRE -304 544 -304 496 WIRE -304 640 -304 608 WIRE -256 192 -304 192 WIRE -256 496 -304 496 WIRE -240 -48 -304 -48 WIRE -240 0 -240 -32 WIRE -208 -256 -304 -256 WIRE -208 -224 -208 -256 WIRE -208 -112 -208 -160 WIRE -128 496 -176 496 WIRE -128 544 -128 496 WIRE -128 640 -128 608 WIRE -112 -256 -208 -256 WIRE -112 -176 -112 -256 WIRE -112 192 -176 192 WIRE -112 240 -112 192 WIRE -80 -176 -112 -176 WIRE -80 -128 -80 -160 WIRE -80 -48 -176 -48 WIRE -80 0 -80 -32 WIRE -80 192 -112 192 WIRE -80 240 -112 240 WIRE -80 256 -128 256 WIRE -64 336 -64 304 WIRE 16 -176 -16 -176 WIRE 16 -128 16 -176 WIRE 16 112 -352 112 WIRE 16 192 -16 192 WIRE 16 192 16 112 WIRE 16 256 -16 256 WIRE 16 256 16 192 WIRE 16 416 16 256 WIRE 16 528 16 480 WIRE 16 544 16 528 WIRE 16 640 16 608 WIRE 80 -48 -16 -48 WIRE 80 320 80 -48 WIRE 80 528 16 528 WIRE 80 544 80 528 WIRE 80 640 80 608 WIRE 192 496 -128 496 WIRE 192 528 80 528 WIRE 192 576 192 544 WIRE 288 512 256 512 WIRE 288 736 288 512 WIRE 336 320 80 320 WIRE 336 560 336 320 WIRE 336 672 336 560 WIRE 352 672 336 672 WIRE 352 736 288 736 WIRE 368 768 368 736 WIRE 384 512 288 512 WIRE 384 560 336 560 WIRE 384 640 384 608 WIRE 464 720 416 720 WIRE 464 720 464 608 WIRE 544 -256 -112 -256 WIRE 544 -240 544 -256 WIRE 544 -128 16 -128 WIRE 544 -128 544 -160 WIRE 608 512 544 512 WIRE 608 512 608 480 WIRE 624 -256 544 -256 WIRE 624 -176 624 -256 WIRE 624 -128 544 -128 WIRE 624 -112 624 -128 WIRE 624 -16 624 -48 WIRE 624 336 592 336 WIRE 624 384 624 352 WIRE 656 -256 624 -256 WIRE 656 -176 624 -176 WIRE 672 -128 624 -128 WIRE 704 480 608 480 WIRE 768 -256 720 -256 WIRE 768 -176 736 -176 WIRE 768 -176 768 -256 WIRE 768 -128 720 -128 WIRE 768 -112 768 -128 WIRE 768 -16 768 -48 WIRE 800 480 704 480 WIRE 800 480 800 288 WIRE 832 336 688 336 WIRE 832 432 768 432 WIRE 832 432 832 336 WIRE 848 -256 768 -256 WIRE 848 -240 848 -256 WIRE 848 -128 768 -128 WIRE 848 -128 848 -160 WIRE 848 288 800 288 WIRE 848 336 832 336 WIRE 848 432 832 432 WIRE 848 480 800 480 WIRE 880 -256 848 -256 WIRE 880 -128 848 -128 WIRE 896 272 896 240 WIRE 896 384 896 352 WIRE 896 416 896 384 WIRE 896 528 896 496 WIRE 896 560 896 528 WIRE 992 -256 960 -256 WIRE 992 -240 992 -256 WIRE 992 -144 992 -176 WIRE 992 240 896 240 WIRE 992 272 992 240 WIRE 992 368 992 336 WIRE 992 384 896 384 WIRE 992 416 992 384 WIRE 992 528 896 528 WIRE 992 528 992 480 WIRE 1040 240 992 240 WIRE 1040 528 992 528 WIRE 1056 -256 992 -256 WIRE 1056 384 992 384 WIRE 1184 -576 1152 -576 WIRE 1184 -544 1184 -576 WIRE 1184 896 1152 896 WIRE 1184 896 1184 864 FLAG 1056 384 Out IOPIN 1056 384 In FLAG 992 -144 COM FLAG 1056 -256 Ref IOPIN 1056 -256 In FLAG -352 -48 Osc IOPIN -352 -48 In FLAG -128 640 COM FLAG -352 192 Vfb IOPIN -352 192 In FLAG -352 112 Err IOPIN -352 112 In FLAG 16 640 COM FLAG -368 496 Ifb IOPIN -368 496 In FLAG -304 640 COM FLAG -304 320 COM FLAG -304 64 COM FLAG -128 256 2v5 FLAG -352 -256 Vcc IOPIN -352 -256 In FLAG 768 -16 COM FLAG 1040 240 Vcc IOPIN 1040 240 In FLAG 1040 528 Com IOPIN 1040 528 In FLAG 992 368 COM FLAG 880 -128 2v5 FLAG 592 336 Ref FLAG 80 640 COM FLAG -208 -112 COM FLAG 624 -16 COM FLAG 768 432 fault FLAG -304 -112 COM FLAG 624 384 COM FLAG -64 336 COM FLAG 368 768 COM FLAG -80 0 COM FLAG -240 0 COM FLAG -80 -128 COM FLAG 896 560 COM FLAG 192 576 COM FLAG 384 640 COM FLAG 704 480 T1 IOPIN 704 480 Out SYMBOL current -304 -224 R0 WINDOW 3 -40 -56 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 -40 0 Left 0 SYMATTR Value TBL(0 0 1 .2m) SYMATTR InstName I1 SYMBOL zener -224 -160 M180 WINDOW 0 32 64 Left 0 WINDOW 3 32 0 Left 0 SYMATTR InstName D1 SYMATTR Value 34V SYMBOL Digital\\schmtbuf -80 -240 R0 WINDOW 0 0 32 Left 0 WINDOW 3 0 -40 Left 0 WINDOW 38 48 32 Left 0 WINDOW 123 0 0 Left 0 SYMATTR InstName A1 SYMATTR Value Vt=8.2 Vh=0.3 SYMATTR Value2 Vhigh=2.5 Rout=1k SYMBOL res 528 -256 R0 SYMATTR InstName R1 SYMATTR Value 8e6 SYMBOL cap 608 -112 R0 WINDOW 0 32 8 Left 0 WINDOW 3 32 56 Left 0 SYMATTR InstName C1 SYMATTR Value 1p SYMBOL sw 752 -176 M270 WINDOW 0 40 88 VRight 0 WINDOW 3 40 32 VLeft 0 SYMATTR InstName S1 SYMATTR Value ref SYMBOL diode 720 -272 R90 WINDOW 0 -8 56 VRight 0 WINDOW 3 -8 0 VLeft 0 SYMATTR InstName D2 SYMATTR Value V65 SYMBOL cap 784 -112 M0 WINDOW 3 32 56 Left 0 WINDOW 39 -16 32 Right 0 WINDOW 0 32 8 Left 0 SYMATTR Value 1p SYMATTR SpiceLine Rpar=240 SYMATTR InstName C2 SYMBOL res 864 -144 R180 WINDOW 0 36 76 Left 0 WINDOW 3 36 40 Left 0 SYMATTR InstName R2 SYMATTR Value 240 SYMBOL res 976 -272 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 280m SYMBOL cap 976 -176 M180 WINDOW 0 32 56 Left 0 WINDOW 3 32 8 Left 0 SYMATTR InstName C3 SYMATTR Value 10p SYMBOL cap -288 -32 M0 WINDOW 3 32 56 Left 0 WINDOW 0 32 8 Left 0 SYMATTR Value 5p SYMATTR InstName C4 SYMBOL Digital\\buf1 -240 -112 R0 WINDOW 3 0 128 Left 0 WINDOW 38 48 32 Left 0 WINDOW 0 0 32 Left 0 WINDOW 123 0 160 Left 0 WINDOW 39 0 192 Left 0 SYMATTR Value Vtcap=1.75 Vhcap=.85 SYMATTR SpiceModel ExtOsc SYMATTR InstName A2 SYMATTR Value2 Icharge=1p Idischarge=8.3m SYMATTR SpiceLine duty=.96 tripdt=5n nobreak SYMBOL Digital\\buf1 -80 -112 R0 WINDOW 3 32 88 Left 0 WINDOW 38 48 32 Left 0 WINDOW 0 0 32 Left 0 SYMATTR Value cycles=2 SYMATTR SpiceModel Counter SYMATTR InstName A3 SYMBOL cap -288 224 M0 WINDOW 0 32 8 Left 0 WINDOW 3 32 56 Left 0 SYMATTR InstName C5 SYMATTR Value 1p SYMBOL res -160 176 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R4 SYMATTR Value 165k SYMBOL cap -16 176 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 WINDOW 39 -40 32 VCenter 0 SYMATTR InstName C6 SYMATTR Value 1p SYMATTR SpiceLine Rpar=10G SYMBOL Digital\\or -48 208 R0 WINDOW 0 -160 96 Left 0 WINDOW 38 -112 96 Left 0 WINDOW 3 48 144 Right 0 WINDOW 123 48 176 Right 0 WINDOW 39 48 208 Right 0 SYMATTR InstName A4 SYMATTR SpiceModel OTA SYMATTR Value Vhigh=6 Vlow=0.7 Isrc=1m Isink=-6m SYMATTR Value2 Rclamp=1 g=5 Rout=25k Cout=5p SYMATTR SpiceLine eaclk=A2 powerup=!V(fault,Com) SYMBOL cap -288 544 M0 WINDOW 0 32 8 Left 0 WINDOW 3 32 56 Left 0 SYMATTR InstName C7 SYMATTR Value 5p SYMBOL res -160 480 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R5 SYMATTR Value 75k SYMBOL cap -144 544 R0 WINDOW 0 32 8 Left 0 WINDOW 3 32 56 Left 0 SYMATTR InstName C8 SYMATTR Value 1p SYMBOL diode 32 416 M0 WINDOW 3 40 56 Left 0 WINDOW 0 40 24 Left 0 SYMATTR Value 2R SYMATTR InstName D3 SYMBOL diode 32 544 M0 WINDOW 3 41 40 Left 0 WINDOW 0 41 8 Left 0 SYMATTR Value 1R SYMATTR InstName D4 SYMBOL cap 64 544 R0 WINDOW 0 32 8 Left 0 WINDOW 3 40 32 Left 0 WINDOW 39 32 56 Left 0 SYMATTR InstName C9 SYMATTR Value 1p SYMATTR SpiceLine Rpar=1e6 SYMBOL Digital\\schmtinv 624 272 R0 WINDOW 0 0 32 Left 0 WINDOW 3 32 88 Left 0 WINDOW 38 48 32 Left 0 WINDOW 123 32 120 Left 0 SYMATTR InstName A6 SYMATTR Value Vt=4.8 Vh=.1 SYMATTR Value2 trise=200n SYMBOL sw 896 368 M180 WINDOW 0 32 88 Left 0 WINDOW 3 32 32 Left 0 SYMATTR InstName S2 SYMATTR Value Ho SYMBOL sw 896 512 M180 WINDOW 0 32 88 Left 0 WINDOW 3 32 32 Left 0 SYMATTR InstName S3 SYMATTR Value Lo SYMBOL cap 976 272 R0 WINDOW 3 32 56 Left 0 WINDOW 0 32 8 Left 0 SYMATTR Value 20p SYMATTR InstName C10 SYMBOL cap 976 416 R0 WINDOW 0 32 8 Left 0 WINDOW 3 32 64 Left 0 SYMATTR InstName C11 SYMATTR Value 20p SYMBOL Digital\\dflop 464 464 R0 WINDOW 3 8 12 Left 0 SYMATTR Value trise=200n tripdt=5n SYMATTR InstName A7 SYMBOL Digital\\and 384 640 R0 WINDOW 3 14 114 Left 0 SYMATTR Value tripdt=5n SYMATTR InstName A8 SYMBOL Digital\\diffschmtinv 192 448 R0 WINDOW 3 8 44 Left 0 SYMATTR InstName A5 SYMATTR Value tripdt=5u trise=1n tfall=1n Vt=1u TEXT 624 624 Left 0 !.model 1R d(Vfwd=1 Ron=1) TEXT 624 592 Left 0 !.model 2R d(Vfwd=1.3 Ron=2e6) TEXT 112 48 Left 0 !.model 34V d(Ron=.5 Vfwd=.5 Vrev=34 Rrev=22) TEXT 112 80 Left 0 !.model ref sw(Vh=-11m Ilimit=100m) TEXT 112 176 Left 0 !.model Ho sw(Vt= .48 Vh=-.25 Ron=2 Roff=100k Vser=1.2) TEXT 112 208 Left 0 !.model Lo sw(Vt=-.52 Vh=-.25 Ron=6 Roff=300k) TEXT 112 16 Left 0 !.model V65 d(Vfwd=0.65) TEXT 144 -528 Center 0 ;>> LT3845A-2 <<\nLTspice A-Device Behavioral Model\nCopyright 2004 by analog@ieee.org TEXT -424 -448 Left 0 ;NOTES:\nUC3842A: for A1 Vt=13 Vh=3.0 and bypass A3 (delete)\nUC3843A: for A1 Vt=8.2 Vh=0.3 and bypass A3 (delete)\nUC3844A: for A1 Vt=13 Vh=3.0; for A3 cycles=2\nUC3845A: for A1 Vt=8.2 Vh=0.3; for A3 cycles=2 RECTANGLE Normal 1168 880 -448 -560