Version 4
SHEET 1 1804 680
WIRE 1136 -240 912 -240
WIRE 1328 -240 1136 -240
WIRE 1408 -240 1328 -240
WIRE 1488 -240 1408 -240
WIRE 1488 -176 1488 -240
WIRE 1136 -160 1136 -240
WIRE 1408 -144 1408 -240
WIRE 1024 -112 1024 -128
WIRE 1072 -112 1024 -112
WIRE 1328 -112 1328 -240
WIRE 912 -48 912 -240
WIRE 1328 -16 1328 -32
WIRE 1408 -16 1408 -80
WIRE 1408 -16 1328 -16
WIRE 1328 0 1328 -16
WIRE 1136 48 1136 -64
WIRE 1216 48 1136 48
WIRE 1216 80 1216 48
WIRE 1280 80 1216 80
WIRE 96 96 -320 96
WIRE 608 96 320 96
WIRE 672 96 608 96
WIRE 784 96 752 96
WIRE 912 96 912 32
WIRE 1024 96 1024 -112
WIRE 1024 96 912 96
WIRE 1136 96 1136 48
WIRE -320 112 -320 96
WIRE 608 112 608 96
WIRE 1024 144 1024 96
WIRE 1072 144 1024 144
WIRE 912 160 912 96
WIRE 96 176 64 176
WIRE 384 176 320 176
WIRE 512 176 384 176
WIRE 384 192 384 176
WIRE 512 192 512 176
WIRE 608 208 608 192
WIRE 784 208 784 96
WIRE 800 208 784 208
WIRE 848 208 800 208
WIRE 864 208 848 208
WIRE -320 224 -320 192
WIRE 0 256 -16 256
WIRE 96 256 80 256
WIRE 384 256 320 256
WIRE 800 256 800 208
WIRE 864 256 864 240
WIRE 864 256 800 256
WIRE 384 272 384 256
WIRE 512 288 512 272
WIRE 1328 304 1328 96
WIRE 912 320 912 256
WIRE 1136 320 1136 192
WIRE 1328 320 1328 304
FLAG -320 224 0
FLAG 512 288 0
FLAG 608 96 PWMOUT
FLAG 608 208 0
FLAG 384 272 0
FLAG -16 256 0
FLAG 64 176 0
FLAG -320 96 AnalogIN
FLAG 912 320 0
FLAG 1136 320 0
FLAG 1328 304 0
FLAG 1488 -96 0
SYMBOL res 96 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 400k
SYMBOL res 592 96 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL voltage 512 176 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -320 96 R0
WINDOW 123 24 146 Left 2
WINDOW 39 24 125 Left 2
SYMATTR Value PULSE(800m 400m 0 1n 1n 3m 10m)
SYMATTR InstName V2
SYMBOL SpecialFunctions\\LTC6992-1 208 176 R0
SYMATTR InstName U1
SYMBOL cap 368 192 R0
WINDOW 0 39 10 Left 2
WINDOW 3 36 53 Left 2
SYMATTR InstName C1
SYMATTR Value 0.1µ
SYMATTR SpiceLine Rser=.003
SYMBOL res 768 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 220
SYMBOL res 896 -64 R0
SYMATTR InstName R3
SYMATTR Value 6k8
SYMBOL npn 1072 -160 R0
SYMATTR InstName Q2
SYMATTR Value BC547C
SYMBOL pnp 1072 192 M180
SYMATTR InstName Q3
SYMATTR Value BC557C
SYMBOL ind 1312 -128 R0
SYMATTR InstName L1
SYMATTR Value 1.3m
SYMATTR SpiceLine Rser=6.25
SYMBOL nmos 1280 0 R0
SYMATTR InstName M1
SYMATTR Value BSZ105N04NS
SYMBOL voltage 1488 -192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 24
SYMBOL schottky 1424 -80 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value MBRS340
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL npn 848 160 R0
SYMATTR InstName Q1
SYMATTR Value BC547C
TEXT 600 280 Left 2 !.tran 5m