* SPICE netlist
Q1 N004 N006 N010 0 NP
Q2 N005 N007 N010 0 NP
L1 N004 N003 20
L2 N003 N005 20
C1 N005 N004 .068
L3 N007 N006 1
V1 N008 0 28
L4 N001 N002 50m
R1 N002 N001 70K
L5 N010 N012 100
D1 N012 N008 1N5818
R2 N003 N009 220K
R3 N009 N010 100K
C3 N003 N009 1000p
D2 0 N012 1N5818
C4 N015 0 1
V2 N011 0 5
R5 N008 N007 500
R6 N002 0 1G
XU1 0 N013 0 N015 0 N014 N011 0 SDA SCL N013 N011 N003 N008 N009 N012 LT1786F ;pnba PGND)Iccfl)DIO)CCFL Vc)AGND)_SHDN)_SMBSUS)ADR)SDA)SCL)Iout)Vcc)ROYER)BAT)BULB)CCFL SW
.tran 7m
K1 L1 L2 L3 L4 1
.include SMBus.vector

* LTspice schematic (.asc)
Version 4
SHEET 1 1168 1312
WIRE 168 -640 88 -640
WIRE 312 -640 248 -640
WIRE 376 -640 312 -640
WIRE 376 -624 376 -640
WIRE 88 -528 88 -640
WIRE 168 -528 88 -528
WIRE 312 -528 312 -640
WIRE 312 -528 248 -528
WIRE 376 -512 376 -544
WIRE -88 -464 -200 -464
WIRE 200 -464 -88 -464
WIRE 408 -464 200 -464
WIRE -88 -416 -88 -464
WIRE 104 -400 88 -400
WIRE 200 -400 200 -464
WIRE 200 -400 184 -400
WIRE 216 -400 200 -400
WIRE 328 -400 296 -400
WIRE -200 -368 -200 -464
WIRE 168 -304 8 -304
WIRE 424 -304 248 -304
WIRE 440 -304 424 -304
WIRE 536 -304 520 -304
WIRE 584 -304 536 -304
WIRE 584 -288 584 -304
WIRE -200 -256 -200 -304
WIRE -88 -256 -88 -336
WIRE -88 -256 -200 -256
WIRE 88 -208 88 -400
WIRE 168 -208 88 -208
WIRE 328 -208 328 -400
WIRE 328 -208 232 -208
WIRE 584 -192 584 -208
WIRE -88 -176 -88 -256
WIRE 88 -176 88 -208
WIRE 328 -176 328 -208
WIRE 8 -128 8 -304
WIRE 24 -128 8 -128
WIRE 424 -128 424 -304
WIRE 424 -128 392 -128
WIRE -88 -64 -88 -96
WIRE 88 -64 88 -80
WIRE 88 -64 -88 -64
WIRE 200 -64 88 -64
WIRE 328 -64 328 -80
WIRE 328 -64 200 -64
WIRE 200 -48 200 -64
WIRE -472 -32 -584 -32
WIRE -264 -32 -472 -32
WIRE -200 -32 -200 -256
WIRE -40 -32 -200 -32
WIRE -584 -16 -584 -32
WIRE -264 0 -264 -32
WIRE -40 0 -40 -32
WIRE -584 80 -584 64
WIRE -376 80 -408 80
WIRE 136 80 72 80
WIRE 200 80 200 32
WIRE 200 80 136 80
WIRE 264 80 200 80
WIRE 376 80 328 80
WIRE 136 96 136 80
WIRE 376 96 376 80
WIRE -376 176 -408 176
WIRE 136 176 136 160
WIRE 136 176 72 176
WIRE 536 176 536 -304
WIRE 536 176 136 176
WIRE -408 272 -408 176
WIRE -376 272 -408 272
WIRE 408 272 408 -464
WIRE 408 272 72 272
WIRE -376 368 -408 368
WIRE 88 368 72 368
WIRE 184 368 152 368
WIRE -472 464 -472 -32
WIRE -376 464 -472 464
WIRE 120 464 72 464
WIRE -376 560 -408 560
WIRE 120 560 72 560
WIRE -264 656 -264 640
WIRE -40 656 -40 640
FLAG 584 -192 0
FLAG -264 656 0
FLAG 184 368 0
FLAG -584 80 0
FLAG 376 96 0
FLAG -40 656 0
FLAG -408 80 0
FLAG 376 -512 0
FLAG 120 464 SCL
FLAG 120 560 SDA
FLAG -408 560 0
SYMBOL NPN 24 -176 R0
SYMATTR InstName Q1
SYMATTR Value NP
SYMBOL npn 392 -176 M0
SYMATTR InstName Q2
SYMATTR Value NP
SYMBOL ind2 88 -384 R270
SYMATTR InstName L1
SYMATTR Value 20
SYMBOL ind2 200 -384 R270
SYMATTR InstName L2
SYMATTR Value 20
SYMBOL cap 232 -224 R90
SYMATTR InstName C1
SYMATTR Value .068
SYMBOL ind2 264 -288 M270
SYMATTR InstName L3
SYMATTR Value 1
SYMBOL VOLTAGE 584 -304 R0
SYMATTR InstName V1
SYMATTR Value 28
SYMBOL ind2 152 -544 M90
SYMATTR InstName L4
SYMATTR Value 50m
SYMBOL RES 264 -656 R90
SYMATTR InstName R1
SYMATTR Value 70K
SYMBOL ind 184 -64 R0
SYMATTR InstName L5
SYMATTR Value 100
SYMBOL schottky 120 96 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL res -104 -432 R0
SYMATTR InstName R2
SYMATTR Value 220K
SYMBOL res -104 -192 R0
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL cap -216 -368 R0
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL schottky 328 64 R90
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL cap 88 384 R270
SYMATTR InstName C4
SYMATTR Value 1
SYMBOL VOLTAGE -584 -32 R0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL res 536 -320 R90
SYMATTR InstName R5
SYMATTR Value 500
SYMBOL res 360 -640 R0
SYMATTR InstName R6
SYMATTR Value 1G
SYMBOL POWERPRODUCTS\\LT1786F -152 320 R0
SYMATTR InstName U1