Version 4 SHEET 1 2056 996 WIRE 1440 -464 560 -464 WIRE 16 -368 -128 -368 WIRE 240 -368 16 -368 WIRE 464 -368 240 -368 WIRE 928 -368 464 -368 WIRE 1040 -368 1008 -368 WIRE 1120 -368 1040 -368 WIRE 1248 -368 1184 -368 WIRE 1328 -368 1248 -368 WIRE 1440 -368 1440 -464 WIRE 1440 -368 1392 -368 WIRE 1600 -368 1440 -368 WIRE 1728 -368 1600 -368 WIRE 1776 -368 1728 -368 WIRE -128 -352 -128 -368 WIRE 16 -352 16 -368 WIRE 240 -352 240 -368 WIRE 896 -352 656 -352 WIRE 1776 -352 1776 -368 WIRE 864 -336 752 -336 WIRE 1040 -336 1040 -368 WIRE 1248 -336 1248 -368 WIRE 464 -320 464 -368 WIRE 560 -320 560 -464 WIRE 656 -320 656 -352 WIRE 752 -320 752 -336 WIRE 1776 -272 1776 -288 WIRE -880 -256 -880 -272 WIRE -128 -256 -128 -272 WIRE 16 -256 16 -288 WIRE 128 -256 96 -256 WIRE 240 -256 240 -272 WIRE 240 -256 208 -256 WIRE 400 -256 240 -256 WIRE 992 -256 816 -256 WIRE 1248 -224 1248 -256 WIRE 1440 -208 1440 -368 WIRE -880 -160 -880 -192 WIRE 368 -160 -880 -160 WIRE 400 -160 368 -160 WIRE 1040 -160 1040 -240 WIRE 1040 -160 816 -160 WIRE 1072 -160 1040 -160 WIRE 1168 -160 1152 -160 WIRE 896 -112 896 -352 WIRE 1264 -112 896 -112 WIRE 1728 -112 1728 -368 WIRE 1728 -112 1344 -112 WIRE -880 -64 -880 -160 WIRE -256 -64 -880 -64 WIRE -128 -64 -176 -64 WIRE 64 -64 -128 -64 WIRE 400 -64 64 -64 WIRE 832 -64 816 -64 WIRE -128 -32 -128 -64 WIRE 64 -32 64 -64 WIRE 864 -16 864 -336 WIRE 1728 -16 1728 -32 WIRE 1728 -16 864 -16 WIRE 368 32 368 -160 WIRE 400 32 368 32 WIRE 1440 32 1440 -128 WIRE 1440 32 816 32 WIRE 1456 32 1440 32 WIRE 1552 32 1536 32 WIRE -656 128 -768 128 WIRE -496 128 -656 128 WIRE 368 128 -416 128 WIRE 400 128 368 128 WIRE 1440 128 816 128 WIRE 1600 128 1600 -368 WIRE 1600 128 1440 128 WIRE -768 176 -768 128 WIRE -48 176 -48 160 WIRE 224 224 208 224 WIRE 400 224 288 224 WIRE 1600 224 1600 208 WIRE 1600 224 816 224 WIRE 64 240 64 48 WIRE -656 256 -656 128 WIRE -624 256 -656 256 WIRE -240 256 -272 256 WIRE -48 256 -48 240 WIRE -48 256 -160 256 WIRE -880 272 -880 -64 WIRE 1600 304 1600 224 WIRE -768 320 -768 256 WIRE -624 320 -768 320 WIRE -16 320 -272 320 WIRE 16 320 -16 320 WIRE 400 320 208 320 WIRE 1552 320 816 320 WIRE 64 352 64 336 WIRE -880 384 -880 352 WIRE -624 384 -880 384 WIRE -256 384 -272 384 WIRE -880 400 -880 384 WIRE -768 416 -768 320 WIRE 400 416 320 416 WIRE 864 416 816 416 WIRE 976 416 864 416 WIRE 1152 416 976 416 WIRE 1296 416 1216 416 WIRE 1440 416 1440 128 WIRE 1440 416 1376 416 WIRE 976 432 976 416 WIRE 1600 432 1600 400 WIRE 1728 432 1728 -16 WIRE 1728 432 1600 432 WIRE -624 448 -640 448 WIRE -128 448 -128 48 WIRE -128 448 -272 448 WIRE 1600 480 1600 432 WIRE 608 496 608 480 WIRE 768 496 768 480 WIRE -880 512 -880 480 WIRE 368 512 368 128 WIRE 528 512 528 480 WIRE 528 512 368 512 WIRE 976 512 976 496 WIRE -16 544 -16 320 WIRE 448 544 448 480 WIRE 448 544 -16 544 WIRE -768 560 -768 496 WIRE -128 560 -128 448 WIRE -128 560 -768 560 WIRE -768 576 -768 560 WIRE -128 576 -128 560 WIRE 608 576 608 560 WIRE 688 576 688 480 WIRE 768 576 768 560 WIRE 208 592 208 320 WIRE 320 592 320 416 WIRE 1600 592 1600 544 WIRE -768 672 -768 656 WIRE -128 672 -128 640 WIRE 608 672 608 656 WIRE 688 672 688 656 WIRE -48 704 -48 256 WIRE 208 704 208 672 WIRE 208 704 -48 704 WIRE 320 704 320 672 WIRE 320 704 208 704 WIRE 864 704 864 416 WIRE 864 704 320 704 FLAG -128 -256 0 FLAG 96 -256 0 FLAG 208 224 0 FLAG 608 672 0 FLAG 688 672 0 FLAG 768 576 0 FLAG 976 512 0 FLAG 832 -64 0 FLAG 1168 -160 0 FLAG 1600 592 0 FLAG 1552 32 0 FLAG 1776 -272 0 FLAG 1776 -368 OUT FLAG -128 -368 IN FLAG 16 -256 0 FLAG 1248 -224 0 FLAG -880 512 0 FLAG 64 352 0 FLAG -640 448 0 FLAG -48 160 0 FLAG -768 672 0 FLAG -128 672 0 FLAG -768 560 CTRL_IN FLAG 1600 432 LED FLAG -880 -272 0 SYMBOL voltage -128 -368 R0 WINDOW 123 24 138 Left 2 WINDOW 39 24 117 Left 2 SYMATTR Value 14 SYMATTR InstName V1 SYMBOL res 224 -368 R0 SYMATTR InstName R2 SYMATTR Value 499K SYMBOL res 224 -272 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 97.6K SYMBOL cap 288 208 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL cap 592 496 R0 WINDOW 39 24 77 Left 2 SYMATTR InstName C3 SYMATTR Value .022µ SYMBOL res 672 560 R0 SYMATTR InstName R4 SYMATTR Value 19.6K SYMBOL cap 752 496 R0 SYMATTR InstName C4 SYMATTR Value .05µ SYMBOL cap 960 432 R0 SYMATTR InstName C5 SYMATTR Value 4.7µ SYMBOL nmos 992 -336 R0 WINDOW 0 57 12 Left 2 WINDOW 3 53 65 Left 2 SYMATTR InstName Q1 SYMATTR Value BSC160N10NS3 SYMBOL res 1056 -144 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R5 SYMATTR Value 15m SYMBOL res 1584 112 R0 SYMATTR InstName R6 SYMATTR Value .27 SYMBOL pmos 1552 400 M180 WINDOW 0 62 69 Left 2 WINDOW 3 58 30 Left 2 SYMATTR InstName Q2 SYMATTR Value Si7465DP SYMBOL LED 1584 480 R0 WINDOW 123 24 85 Left 2 SYMATTR Value2 N=10 SYMATTR InstName D1 SYMATTR Value LXK2-PW14 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 1424 -224 R0 SYMATTR InstName R7 SYMATTR Value 1Meg SYMBOL res 1440 48 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R8 SYMATTR Value 23.7K SYMBOL cap 1760 -352 R0 WINDOW 123 30 62 Left 2 WINDOW 3 39 39 Left 2 SYMATTR Value2 x4 SYMATTR Value 2.2µ SYMATTR InstName C6 SYMATTR SpiceLine Rser=10m SYMBOL ind2 912 -352 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 22µ SYMATTR SpiceLine Rser=20m SYMATTR Type ind SYMBOL schottky 1328 -352 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D2 SYMATTR Value PDS5100 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 592 560 R0 SYMATTR InstName R9 SYMATTR Value 1K SYMBOL LT3796-1 608 80 R0 SYMATTR InstName U1 SYMBOL cap 0 -352 R0 WINDOW 123 24 57 Left 2 WINDOW 3 40 32 Left 2 SYMATTR Value2 x3 SYMATTR Value 2.2µ SYMATTR InstName C1 SYMATTR SpiceLine Rser=10m SYMBOL cap 1184 -384 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 123 53 32 VTop 2 SYMATTR InstName C7 SYMATTR Value 2.2µ SYMATTR Value2 x2 SYMATTR SpiceLine Rser=10m SYMBOL ind2 1232 -240 M180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L2 SYMATTR Value 22µ SYMATTR SpiceLine Rser=20m SYMATTR Type ind SYMBOL res 1712 -128 R0 SYMATTR InstName R10 SYMATTR Value 3.32 SYMBOL schottky 1152 432 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D3 SYMATTR Value PMEG6010AED SYMATTR Description Diode SYMATTR Type diode SYMBOL res 1392 400 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 10K SYMBOL LTC1541 -448 352 R0 SYMATTR InstName U2 SYMBOL res -400 112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 10K SYMBOL res -896 256 R0 SYMATTR InstName R14 SYMATTR Value 200K SYMBOL res -896 384 R0 SYMATTR InstName R15 SYMATTR Value 113K SYMBOL res -784 160 R0 SYMATTR InstName R16 SYMATTR Value 100K SYMBOL res -784 400 R0 SYMATTR InstName R17 SYMATTR Value 100K SYMBOL res -144 -48 R0 SYMATTR InstName R1 SYMATTR Value 30.1K SYMBOL res -272 -48 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R13 SYMATTR Value 200K SYMBOL res 48 -48 R0 SYMATTR InstName R18 SYMATTR Value 7.87K SYMBOL nmos 16 240 R0 WINDOW 0 57 12 Left 2 WINDOW 3 53 65 Left 2 SYMATTR InstName Q3 SYMATTR Value IRLML6246 SYMBOL res -144 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R19 SYMATTR Value 1K SYMBOL cap -64 240 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C8 SYMATTR Value .1µ SYMBOL voltage -768 560 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value PWL(3m 2 7m .1) SYMBOL cap -144 576 R0 SYMATTR InstName C9 SYMATTR Value .1µ SYMBOL res 192 576 R0 SYMATTR InstName R20 SYMATTR Value 100K SYMBOL res 304 576 R0 SYMATTR InstName R21 SYMATTR Value 100K SYMBOL cap -896 -192 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C10 SYMATTR Value .1µ SYMBOL res 1360 -128 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R22 SYMATTR Value 6.65K TEXT 928 672 Left 2 !.tran 8m startup TEXT 456 -488 Bottom 2 ;LT3796-1 - 100V Constant-Current and Constant-Voltage Controller with Dual Current Sense\nLTC1541 - Micropower Op Amp, Comparator and Reference\nSEPIC LED Driver with 100:1 Analog Dimming\nInput: 8V to 20V Output: 35V String @ 1A, Fsw = 400k Hz TEXT 1080 -432 Left 2 !K1 L1 L2 1 TEXT -240 720 Left 2 ;Notes: \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 © 2014 Linear Technology Inc. All rights reserved.