Version 4 SHEET 1 2076 1228 WIRE 192 -192 96 -192 WIRE 96 -176 96 -192 WIRE 192 -128 192 -192 WIRE 480 -128 192 -128 WIRE -272 -96 -336 -96 WIRE -144 -96 -208 -96 WIRE 32 -96 -144 -96 WIRE 480 -96 480 -128 WIRE 32 -80 32 -96 WIRE 96 -80 96 -96 WIRE 112 -80 96 -80 WIRE 192 -80 192 -128 WIRE 368 -80 192 -80 WIRE 368 -64 368 -80 WIRE 1472 -64 1344 -64 WIRE 1552 -64 1472 -64 WIRE 1664 -64 1632 -64 WIRE 192 -48 192 -80 WIRE -144 -32 -144 -96 WIRE 1344 -32 1344 -64 WIRE 1472 -32 1472 -64 WIRE -432 32 -544 32 WIRE -336 32 -336 -96 WIRE -336 32 -432 32 WIRE -272 32 -336 32 WIRE 144 32 -16 32 WIRE 192 64 192 48 WIRE 368 64 368 0 WIRE 368 64 192 64 WIRE 32 80 32 -16 WIRE 192 80 192 64 WIRE 192 80 32 80 WIRE 1664 80 1664 -64 WIRE 368 96 368 64 WIRE 384 96 368 96 WIRE 672 96 384 96 WIRE 880 96 672 96 WIRE 992 96 960 96 WIRE 1008 96 992 96 WIRE 1120 96 1088 96 WIRE 1344 96 1344 32 WIRE 1344 96 1200 96 WIRE -272 112 -384 112 WIRE 32 112 32 80 WIRE 32 112 -16 112 WIRE 192 112 192 80 WIRE -544 128 -544 32 WIRE -432 128 -432 112 WIRE 384 128 384 96 WIRE 1008 144 1008 96 WIRE 1088 144 1088 96 WIRE 1472 144 1472 32 WIRE 1472 144 1184 144 WIRE 1344 160 1344 96 WIRE 1472 160 1472 144 WIRE -272 192 -320 192 WIRE 144 192 -16 192 WIRE -384 208 -384 112 WIRE -384 208 -480 208 WIRE -544 224 -544 208 WIRE -480 224 -480 208 WIRE -480 224 -544 224 WIRE -432 224 -480 224 WIRE 192 224 192 208 WIRE 256 224 192 224 WIRE 384 224 384 192 WIRE 384 224 256 224 WIRE 480 224 480 -32 WIRE 496 224 480 224 WIRE 192 240 192 224 WIRE 496 256 496 224 WIRE 1008 256 1008 224 WIRE 1008 256 496 256 WIRE 1088 256 1088 224 WIRE 1184 256 1184 144 WIRE 1184 256 1088 256 WIRE 1344 256 1344 224 WIRE 1392 256 1344 256 WIRE 1472 256 1472 224 WIRE 1472 256 1392 256 WIRE 1664 256 1664 144 WIRE 1664 256 1472 256 WIRE -496 272 -544 272 WIRE -144 288 -144 256 WIRE 1392 288 1392 256 WIRE -320 304 -320 192 WIRE -208 304 -320 304 WIRE -544 320 -544 272 WIRE 256 320 256 224 WIRE 496 320 256 320 WIRE -432 368 -432 320 WIRE -272 400 -304 400 WIRE -208 400 -208 304 WIRE -208 400 -272 400 WIRE -208 416 -208 400 WIRE -544 432 -544 400 WIRE -304 432 -304 400 WIRE -304 432 -544 432 WIRE -1040 576 -1456 576 WIRE -528 576 -816 576 WIRE -416 576 -528 576 WIRE -272 576 -272 400 WIRE -272 576 -336 576 WIRE -1456 592 -1456 576 WIRE -528 592 -528 576 WIRE -1040 656 -1072 656 WIRE -752 656 -816 656 WIRE -624 656 -752 656 WIRE -752 672 -752 656 WIRE -624 672 -624 656 WIRE -528 688 -528 672 WIRE -1456 704 -1456 672 WIRE -1136 736 -1152 736 WIRE -1040 736 -1056 736 WIRE -752 736 -816 736 WIRE -752 752 -752 736 WIRE -624 768 -624 752 FLAG -1456 704 0 FLAG -624 768 0 FLAG -528 576 PWMOUT FLAG -528 688 0 FLAG -752 752 0 FLAG -1152 736 0 FLAG -1072 656 0 FLAG -1456 576 AnalogIN FLAG -432 368 0 FLAG -432 128 0 FLAG 192 240 0 FLAG 112 -80 0 FLAG -144 288 0 FLAG 992 96 1 FLAG 1088 96 2 FLAG 672 96 in FLAG 1392 288 0 SYMBOL res -1040 720 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 1000k SYMBOL res -544 576 R0 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL voltage -624 656 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 6 SYMBOL voltage -1456 576 R0 WINDOW 123 24 146 Left 2 WINDOW 39 24 125 Left 2 SYMATTR Value 0.5 SYMATTR InstName V2 SYMBOL SpecialFunctions\\LTC6992-1 -928 656 R0 SYMATTR InstName U1 SYMBOL cap -768 672 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 -320 560 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 100 SYMBOL voltage -432 16 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V5 SYMATTR Value 12 SYMBOL diode -272 -80 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value MUR460 SYMBOL cap 16 -80 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMATTR SpiceLine V=50 Irms=5.62 Rser=0.007 Lser=0 mfg="KEMET" pn="C1210C105K5PAC" type="X5R" SYMBOL nmos 144 -48 R0 SYMATTR InstName M1 SYMATTR Value IRF1310 SYMBOL nmos 144 112 R0 SYMATTR InstName M2 SYMATTR Value Si7942DP SYMBOL voltage 96 -192 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V6 SYMATTR Value 400 SYMBOL diode 384 0 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value MUR460 SYMBOL PowerProducts\\LTC4446 -144 112 R0 SYMATTR InstName U2 SYMBOL npn2 -496 224 R0 SYMATTR InstName Q1 SYMBOL res -560 112 R0 SYMATTR InstName R5 SYMATTR Value 100 SYMBOL res -560 304 R0 SYMATTR InstName R6 SYMATTR Value 100 SYMBOL ind2 1024 240 R180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L1 SYMATTR Value 1m SYMATTR Type ind SYMATTR SpiceLine Ipk=200 Rser=1 Rpar=9000 Cpar=1p SYMBOL ind2 1072 240 M180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L2 SYMATTR Value 40µ SYMATTR Type ind SYMATTR SpiceLine Ipk=200 Rser=1 Rpar=9000 Cpar=1p SYMBOL Misc\\EuropeanResistor 864 112 R270 WINDOW 0 27 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName RP1 SYMATTR Value 1 SYMBOL Misc\\EuropeanResistor 1104 112 R270 WINDOW 0 27 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName RS1 SYMATTR Value 1 SYMBOL cap 464 -96 R0 SYMATTR InstName C3 SYMATTR Value 10µ SYMATTR SpiceLine V=100 Irms=4.58 Rser=0.025 Lser=0 SYMBOL cap 480 256 R0 SYMATTR InstName C4 SYMATTR Value 10µ SYMATTR SpiceLine V=100 Irms=4.58 Rser=0.025 Lser=0 SYMBOL diode 400 192 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMATTR Value MUR460 SYMBOL diode 1360 224 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D4 SYMATTR Value MUR460 SYMBOL diode 1488 224 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D5 SYMATTR Value MUR460 SYMBOL diode 1360 32 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D6 SYMATTR Value MUR460 SYMBOL diode 1488 32 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D7 SYMATTR Value MUR460 SYMBOL ind 1536 -48 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L3 SYMATTR Value 5.6µ SYMATTR SpiceLine Ipk=33 Rser=0.0037 Rpar=1071 Cpar=7.14p mfg="Wurth Elektronik" pn="7443556560 WE-HCB 1890" SYMBOL polcap 1648 80 R0 WINDOW 3 24 56 Left 2 SYMATTR InstName C5 SYMATTR Value 820µ SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=400 Irms=2.22 Rser=0.042 Lser=0 TEXT -536 760 Left 2 !.tran 0 100m 0 100n TEXT -448 1072 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 © 2010 Linear Technology Inc. All rights reserved. TEXT -936 528 Bottom 2 ;LTC6992-1: TimerBlox: Voltage-Controlled Pulse Width Modulator\n1MHz Pulse Width Modulator (PWM) TEXT 992 40 Left 2 !K1 L1 L2 1 RECTANGLE Normal 1216 256 848 16 2