* Z:\tmp\asc_dec_bjh7r6w2\0f72571f4229_LT3843A_dec1.asc
* Generated by LTspice 26.0.1 for Windows.
D1 COM Vcc 34V
A1 Vcc COM COM COM COM COM N002 COM SCHMITT Vt=8.2 Vh=0.3 Vhigh=2.5 Rout=1k
A5 N004 COM COM N008 N009 COM N007 COM SERflop Vt=1u nobreak trise=200n tripdt=5n
C5 Vfb COM 1p
A2 Osc COM COM COM COM COM N004 COM ExtOsc Vtcap=1.75 Vhcap=.85 Icharge=1p Idischarge=8.3m duty=.96 tripdt=5n nobreak
I1 Vcc COM TBL(0 0 1 .2m)
R3 Ref N001 280m
C6 Err N005 1p Rpar=10G
R2 2v5 N001 240
.model D D
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.dio
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 1688 948
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 -256 192 -304 192
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 -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 -80 192 -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 16 432 16 256
WIRE 16 528 16 496
WIRE 16 544 16 528
WIRE 16 640 16 608
WIRE 80 -48 -176 -48
WIRE 80 464 80 -48
WIRE 80 528 16 528
WIRE 80 544 80 528
WIRE 80 640 80 608
WIRE 144 -256 -112 -256
WIRE 144 -128 16 -128
WIRE 144 464 80 464
WIRE 144 512 -128 512
WIRE 144 528 80 528
WIRE 160 560 160 528
WIRE 224 336 192 336
WIRE 224 384 224 352
WIRE 272 -128 224 -128
WIRE 368 -256 320 -256
WIRE 368 -176 336 -176
WIRE 368 -176 368 -256
WIRE 368 -128 320 -128
WIRE 368 -112 368 -128
WIRE 368 -16 368 -48
WIRE 400 480 208 480
WIRE 432 336 288 336
WIRE 432 432 368 432
WIRE 448 -256 368 -256
WIRE 448 -240 448 -256
WIRE 448 -128 368 -128
WIRE 448 -128 448 -160
WIRE 480 -256 448 -256
WIRE 480 -128 448 -128
WIRE 592 -256 560 -256
WIRE 592 -240 592 -256
WIRE 592 -144 592 -176
WIRE 656 -256 592 -256
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 Digital\\and 176 432 R0
WINDOW 0 -48 16 Left 0
WINDOW 38 0 16 Left 0
WINDOW 3 48 64 Left 0
WINDOW 123 48 96 Left 0
SYMATTR InstName A5
SYMATTR SpiceModel SERflop
SYMATTR Value Vt=1u nobreak
SYMATTR Value2 trise=200n tripdt=5n
SYMBOL cap -288 224 M0
WINDOW 0 32 8 Left 0
WINDOW 3 32 56 Left 0
SYMATTR InstName C5
SYMATTR Value 1p
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 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 res 576 -272 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 280m
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 res 464 -144 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R2
SYMATTR Value 240
FLAG 592 -144 COM
FLAG 656 -256 Ref
FLAG -352 -48 Osc
FLAG -352 192 Vfb
FLAG -352 112 Err
FLAG -304 320 COM
FLAG -304 64 COM
FLAG -128 256 2v5
FLAG -352 -256 Vcc
FLAG 368 -16 COM
FLAG 480 -128 2v5
FLAG 192 336 Ref
FLAG -208 -112 COM
FLAG 368 432 fault
FLAG -304 -112 COM
FLAG 224 384 COM
FLAG -64 336 COM
FLAG 160 560 COM
FLAG -240 0 COM
FLAG -80 -128 COM