Version 4 SHEET 1 3164 1300 WIRE 368 -512 -304 -512 WIRE -528 -464 -640 -464 WIRE -400 -464 -448 -464 WIRE -272 -464 -400 -464 WIRE -192 -464 -272 -464 WIRE -112 -464 -192 -464 WIRE -16 -464 -32 -464 WIRE 80 -464 -16 -464 WIRE 608 -464 80 -464 WIRE 640 -464 608 -464 WIRE 720 -464 704 -464 WIRE -640 -448 -640 -464 WIRE -192 -448 -192 -464 WIRE 1328 -400 176 -400 WIRE -272 -384 -272 -464 WIRE -192 -368 -192 -384 WIRE -112 -368 -112 -464 WIRE -96 -368 -112 -368 WIRE -16 -368 -16 -384 WIRE -16 -368 -32 -368 WIRE 1216 -368 272 -368 WIRE -640 -352 -640 -368 WIRE 368 -336 368 -512 WIRE 672 -336 368 -336 WIRE 832 -336 672 -336 WIRE 976 -336 832 -336 WIRE -112 -320 -112 -368 WIRE -16 -320 -16 -368 WIRE 80 -320 80 -464 WIRE 176 -320 176 -400 WIRE 272 -320 272 -368 WIRE 368 -320 368 -336 WIRE 976 -320 976 -336 WIRE -272 -256 -272 -304 WIRE -176 -256 -272 -256 WIRE 832 -256 832 -272 WIRE 832 -256 432 -256 WIRE -272 -240 -272 -256 WIRE 672 -240 672 -336 WIRE 976 -240 976 -256 WIRE -400 -224 -400 -464 WIRE -176 -160 -224 -160 WIRE 672 -160 672 -176 WIRE 672 -160 432 -160 WIRE 1136 -160 928 -160 WIRE 1216 -160 1216 -368 WIRE 1216 -160 1136 -160 WIRE 1232 -160 1216 -160 WIRE 1328 -160 1328 -400 WIRE 1328 -160 1312 -160 WIRE -272 -144 -272 -160 WIRE 608 -144 608 -464 WIRE 928 -144 928 -160 WIRE 1136 -144 1136 -160 WIRE -400 -112 -400 -144 WIRE -224 -112 -224 -160 WIRE -224 -112 -400 -112 WIRE 672 -112 672 -160 WIRE 832 -112 832 -256 WIRE -400 -80 -400 -112 WIRE -176 -64 -208 -64 WIRE 560 -64 432 -64 WIRE 1056 -64 976 -64 WIRE 1136 -64 1136 -80 WIRE -400 16 -400 0 WIRE -176 32 -208 32 WIRE 608 32 608 -48 WIRE 608 32 432 32 WIRE 672 32 672 -48 WIRE 672 32 608 32 WIRE 720 32 672 32 WIRE 832 32 832 -48 WIRE 832 32 800 32 WIRE 928 32 928 -48 WIRE 928 32 832 32 WIRE 1024 32 928 32 WIRE 608 48 608 32 WIRE 928 48 928 32 WIRE 1328 112 1328 -160 WIRE -176 128 -208 128 WIRE 560 128 432 128 WIRE 992 128 976 128 WIRE -304 224 -304 -512 WIRE -272 224 -304 224 WIRE -176 224 -192 224 WIRE 608 224 608 144 WIRE 608 224 432 224 WIRE 768 224 608 224 WIRE 928 224 928 144 WIRE 928 224 768 224 WIRE 768 240 768 224 WIRE 1328 256 1328 112 WIRE -304 320 -304 224 WIRE -272 320 -304 320 WIRE -176 320 -192 320 WIRE 768 320 432 320 WIRE 768 336 768 320 WIRE 768 336 528 336 WIRE 768 352 768 336 WIRE 1216 384 1216 -160 WIRE -272 416 -288 416 WIRE -176 416 -192 416 WIRE 528 416 528 336 WIRE 528 416 432 416 WIRE 1216 480 1216 464 WIRE 1216 480 1168 480 WIRE 1216 496 1216 480 WIRE -288 512 -304 512 WIRE -208 512 -224 512 WIRE -176 512 -208 512 WIRE 992 512 992 128 WIRE 992 512 432 512 WIRE 1216 592 1216 576 WIRE -352 608 -448 608 WIRE -176 608 -352 608 WIRE 1024 608 1024 32 WIRE 1024 608 432 608 WIRE -448 624 -448 608 WIRE -208 704 -208 512 WIRE -176 704 -208 704 WIRE 1056 704 1056 -64 WIRE 1056 704 432 704 WIRE 1328 720 1328 320 WIRE -448 736 -448 704 WIRE -112 784 -112 768 WIRE -16 784 -16 768 WIRE 80 784 80 768 WIRE 176 784 176 768 WIRE 368 784 368 768 WIRE 1168 784 1168 480 WIRE 1168 784 368 784 WIRE 272 800 272 768 WIRE 1280 800 272 800 WIRE 1328 832 1328 816 WIRE -16 864 -16 848 WIRE 176 864 176 848 FLAG -112 784 0 FLAG -16 864 0 FLAG 80 784 0 FLAG 176 864 0 FLAG -640 -352 0 FLAG -272 -144 0 FLAG 976 -240 0 FLAG -400 16 0 FLAG -288 416 0 FLAG -304 512 0 FLAG 768 352 0 FLAG 1216 592 0 FLAG 1328 832 0 FLAG 1136 -64 0 FLAG 720 -464 0 FLAG -192 -368 0 FLAG -640 -464 IN FLAG -448 736 0 FLAG 1328 112 out FLAG -352 608 V_CTRL SYMBOL PowerProducts\\LT3791 128 224 R0 SYMATTR InstName U1 SYMBOL cap -32 784 R0 SYMATTR InstName C1 SYMATTR Value 22n SYMBOL cap 160 784 R0 WINDOW 39 24 77 Left 2 SYMATTR Value 22n SYMATTR InstName C2 SYMBOL voltage -640 -464 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 44 Left 2 SYMATTR InstName V1 SYMATTR Value PWL(0 0 .1m 12) SYMBOL res -128 -448 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 3m SYMBOL res -288 -400 R0 WINDOW 0 38 40 Left 2 SYMATTR InstName R2 SYMATTR Value 332K SYMBOL res -288 -256 R0 WINDOW 0 38 40 Left 2 SYMATTR InstName R3 SYMATTR Value 121K SYMBOL res -32 -480 R0 SYMATTR InstName R4 SYMATTR Value 50 SYMBOL cap -96 -352 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C3 SYMATTR Value 470n SYMBOL cap 960 -320 R0 SYMATTR InstName C4 SYMATTR Value 4.7µ SYMBOL res -416 -240 R0 SYMATTR InstName R5 SYMATTR Value 1Meg SYMBOL res -416 -96 R0 SYMATTR InstName R6 SYMATTR Value 54.9K SYMBOL res -176 400 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 86.6K SYMBOL cap -224 496 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value .1µ SYMBOL nmos 560 -144 R0 WINDOW 0 -2 20 Right 2 WINDOW 3 43 108 Right 2 SYMATTR InstName Q1 SYMATTR Value RJK0651DPB SYMBOL nmos 560 48 R0 WINDOW 0 56 29 Left 2 WINDOW 3 59 77 Left 2 SYMATTR InstName Q2 SYMATTR Value RJK0651DPB SYMBOL ind 704 48 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMATTR SpiceLine Rser=10m Rpar=5K SYMBOL cap 656 -112 R0 SYMATTR InstName C6 SYMATTR Value .1µ SYMBOL cap 816 -112 R0 SYMATTR InstName C7 SYMATTR Value .1µ SYMBOL res 752 224 R0 SYMATTR InstName R8 SYMATTR Value 4m SYMBOL res 1200 368 R0 SYMATTR InstName R9 SYMATTR Value 1Meg SYMBOL res 1200 480 R0 SYMATTR InstName R10 SYMATTR Value 44.2k SYMBOL res 1216 -144 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R11 SYMATTR Value 50m SYMBOL LED 1312 256 R0 WINDOW 123 22 109 Left 2 WINDOW 3 24 81 Left 2 SYMATTR Value2 N=7 SYMATTR Value LUW-W5AP SYMATTR InstName D1 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 1120 -144 R0 WINDOW 123 29 64 Left 2 WINDOW 3 36 35 Left 2 SYMATTR Value2 x4 SYMATTR Value 4.7µ SYMATTR InstName C8 SYMATTR SpiceLine Rser=.010 SYMBOL res -288 336 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R12 SYMATTR Value 200K SYMBOL res -288 240 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R13 SYMATTR Value 200K SYMBOL cap 640 -448 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C9 SYMATTR Value 10µ SYMATTR SpiceLine Rser=.002 SYMBOL ind -544 -448 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 1µ SYMATTR SpiceLine Rser=.1 SYMBOL cap -208 -448 R0 SYMATTR InstName C10 SYMATTR Value 100µ SYMBOL nmos 976 48 M0 SYMATTR InstName Q3 SYMATTR Value RJK0451DPB SYMBOL nmos 976 -144 M0 WINDOW 0 -5 17 Right 2 WINDOW 3 -1 57 Right 2 SYMATTR InstName Q4 SYMATTR Value RJK0451DPB SYMBOL nmos 1280 720 R0 SYMATTR InstName Q5 SYMATTR Value Si2318CDS SYMBOL diode 816 -336 R0 WINDOW 0 37 19 Left 2 SYMATTR InstName D2 SYMATTR Value BAT46WJ SYMBOL diode 656 -240 R0 SYMATTR InstName D3 SYMATTR Value BAT46WJ SYMBOL voltage -448 608 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 2 TEXT 1040 856 Left 2 !.tran 2m startup TEXT -312 872 Left 2 ;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 © 2012 Linear Technology Inc. All rights reserved. TEXT 400 -520 Bottom 2 ;LT3791 - 60V 4-Switch Synchronous Buck-Boost LED Driver Controller\n98% Efficient 50W Buck-Boost LED Driver\nInput: 4.7V to 58V Output: 25V LED @ 2A