Version 4
SHEET 1 1376 876
WIRE -48 -256 -144 -256
WIRE 160 -256 -48 -256
WIRE 288 -256 160 -256
WIRE 544 -256 288 -256
WIRE 688 -256 592 -256
WIRE 848 -256 752 -256
WIRE -144 -240 -144 -256
WIRE 160 -240 160 -256
WIRE 544 -224 544 -256
WIRE 592 -224 592 -256
WIRE 848 -224 848 -256
WIRE 288 -160 288 -256
WIRE 400 -160 288 -160
WIRE -144 -144 -144 -160
WIRE 160 -144 160 -160
WIRE 288 -144 288 -160
WIRE 592 -112 592 -144
WIRE 848 -112 848 -160
WIRE -48 -80 -48 -256
WIRE -32 -80 -48 -80
WIRE 64 -80 48 -80
WIRE 416 -80 384 -80
WIRE 544 -80 544 -144
WIRE 544 -80 496 -80
WIRE -48 16 -48 -80
WIRE -32 16 -48 16
WIRE 64 16 48 16
WIRE 416 16 384 16
WIRE 544 16 544 -80
WIRE 544 16 496 16
WIRE 544 32 544 16
WIRE -48 112 -48 16
WIRE -32 112 -48 112
WIRE 64 112 48 112
WIRE 496 112 384 112
WIRE 544 144 544 128
WIRE 544 144 432 144
WIRE 544 160 544 144
WIRE -48 208 -48 112
WIRE -32 208 -48 208
WIRE 64 208 48 208
WIRE 400 208 400 -160
WIRE 400 208 384 208
WIRE 544 256 544 240
WIRE 544 256 480 256
WIRE 544 272 544 256
WIRE 64 304 -336 304
WIRE 432 304 432 144
WIRE 432 304 384 304
WIRE -336 336 -336 304
WIRE 64 400 32 400
WIRE 480 400 480 256
WIRE 480 400 384 400
WIRE -336 448 -336 416
WIRE -48 496 -48 208
WIRE -32 496 -48 496
WIRE 64 496 48 496
WIRE 400 496 384 496
WIRE -48 592 -48 496
WIRE -32 592 -48 592
WIRE 64 592 48 592
WIRE 400 592 384 592
WIRE 496 592 480 592
WIRE 224 672 224 656
FLAG -144 -144 0
FLAG 544 272 0
FLAG 400 496 0
FLAG 224 672 0
FLAG 496 592 0
FLAG 32 400 0
FLAG -336 448 0
FLAG 592 -112 0
FLAG 848 -112 0
FLAG -144 -256 IN
FLAG 848 -256 OUT
SYMBOL PowerProducts\\LT3751 224 256 R0
SYMATTR InstName U1
SYMBOL voltage -144 -256 R0
SYMATTR InstName V1
SYMATTR Value 24
SYMBOL res 144 -256 R0
SYMATTR InstName R1
SYMATTR Value 40.2K
SYMBOL res 512 -96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 18.2K
SYMBOL res 512 0 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 40.2K
SYMBOL nmos 496 32 R0
SYMATTR InstName Q1
SYMATTR Value IRFP4668
SYMBOL res 528 144 R0
SYMATTR InstName R4
SYMATTR Value 6m
SYMBOL res 384 608 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R5
SYMATTR Value 1.30k
SYMBOL res -48 128 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R6
SYMATTR Value 374K
SYMBOL res -48 224 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R7
SYMATTR Value 475K
SYMBOL res -48 -64 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R8
SYMATTR Value 374K
SYMBOL res -48 32 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R9
SYMATTR Value 475K
SYMBOL res -48 512 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R10
SYMATTR Value 100K
SYMBOL res -48 608 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R11
SYMATTR Value 100K
SYMBOL voltage -336 320 R0
WINDOW 123 24 146 Left 0
WINDOW 39 24 125 Left 0
SYMATTR InstName V2
SYMATTR Value PWL(.1m 0 .101m 5)
SYMBOL ind2 528 -240 R0
WINDOW 0 -3 41 Right 0
WINDOW 3 -3 74 Right 0
SYMATTR InstName L1
SYMATTR Value 10µ
SYMATTR Type ind
SYMATTR SpiceLine Rser=15m
SYMBOL ind2 608 -128 R180
WINDOW 0 -1 71 Right 0
WINDOW 3 0 37 Right 0
SYMATTR InstName L2
SYMATTR Value 1000µ
SYMATTR Type ind
SYMBOL diode 688 -240 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D1
SYMATTR Value MUR460
SYMBOL cap 832 -224 R0
SYMATTR InstName C1
SYMATTR Value 3.3µ
TEXT 568 -256 Bottom 0 !K1 L1 L2 1
TEXT 736 480 Left 0 !.tran 4m startup
TEXT 352 -288 Bottom 0 ;LT3751 - Capacitor Charger Controller with Regulation\nInput: 24V   Output: 300V
TEXT -296 688 Left 0 ;Note:\n  If the simulation model is not found please update with the "Sync Release" command from the "Tools" menu.\n  It remains the customer's responsibility to verify proper and reliable operation in the actual application.\n  Component substitution and printed circuit board layout may significantly affect circuit performance or reliability.\n  Contact your local sales representative for assistance. This circuit is distributed to customers only for use with LTC parts.\n  Copyright © 2010 Linear Technology Inc. All rights reserved.
TEXT 1016 8 Center 0 ;Scale charge time by the output capacitance\nused in the practical circuit.  For simulation, a 3.3uF\ncap is used to reduce simulation time.
LINE Normal 886 -136 960 -64 2
LINE Normal 911 -128 886 -136 2
LINE Normal 893 -113 886 -136 2
CIRCLE Normal 704 144 1312 -64 2