Path: ...!weretis.net!feeder9.news.weretis.net!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!nnrp.usenet.blueworldhosting.com!.POSTED!not-for-mail From: "Edward Rawde" Newsgroups: sci.electronics.design Subject: Another design Date: Thu, 9 May 2024 01:47:44 -0400 Organization: BWH Usenet Archive (https://usenet.blueworldhosting.com) Lines: 241 Message-ID: Injection-Date: Thu, 9 May 2024 05:47:45 -0000 (UTC) Injection-Info: nnrp.usenet.blueworldhosting.com; logging-data="4924"; mail-complaints-to="usenet@blueworldhosting.com" Cancel-Lock: sha1:UHRWVkopgh+twwM4gQBn9l2f5Is= sha256:fbM5MEJ7u5RMVGwB/hTcixW3erEVC0MeYtaYJ1A5aq8= sha1:chCDYxSekLSPr1s0frZij3F+aXk= sha256:/gxlTPM2CbXw1FQahL2tFn10XFqi3CTWGfQxSTTnwRQ= X-RFC2646: Format=Flowed; Original X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-MSMail-Priority: Normal X-Priority: 3 X-Newsreader: Microsoft Outlook Express 6.00.2900.5931 Bytes: 6784 Now with 9V to 15V input range, direct gate drive and 500mA LED current. Startup behaviour is not ideal but maybe that can be fixed if it needs fixing. What's the cheapest op amp I can use for U2 instead of OP07? Is there a cheaper comparator instead of LT1719 which will work? Also the fet is bigger than it needs to ne. Is there a better device for D4? Particularly if R4 can be reduced. Will it work at all? Except in simulation. Version 4 SHEET 1 2820 680 WIRE 1312 -272 0 -272 WIRE 1408 -208 288 -208 WIRE 976 -144 160 -144 WIRE 1088 -144 1040 -144 WIRE -32 -48 -64 -48 WIRE 0 -48 0 -272 WIRE 0 -48 -32 -48 WIRE 48 -48 0 -48 WIRE 240 -48 48 -48 WIRE 336 -48 240 -48 WIRE 448 -48 336 -48 WIRE 464 -48 448 -48 WIRE 528 -48 464 -48 WIRE 608 -48 528 -48 WIRE 672 -48 608 -48 WIRE 800 -48 768 -48 WIRE 816 -48 800 -48 WIRE 864 -48 816 -48 WIRE 992 -48 944 -48 WIRE 1024 -48 992 -48 WIRE 1136 -48 1024 -48 WIRE 240 -16 240 -48 WIRE 336 -16 336 -48 WIRE 1408 -16 1408 -208 WIRE 1136 0 1136 -48 WIRE -64 32 -64 -48 WIRE 448 64 448 -48 WIRE 464 64 464 -48 WIRE 48 80 48 -48 WIRE 160 80 160 -144 WIRE 240 80 240 64 WIRE 240 80 160 80 WIRE 336 80 336 64 WIRE 384 80 336 80 WIRE 416 80 384 80 WIRE 816 80 816 -48 WIRE 992 80 992 -48 WIRE 288 96 288 -208 WIRE 336 96 336 80 WIRE 336 96 288 96 WIRE 656 96 480 96 WIRE 688 96 688 0 WIRE 688 96 656 96 WIRE 240 112 240 80 WIRE 384 112 240 112 WIRE 416 112 384 112 WIRE 528 112 528 -48 WIRE 608 112 608 -48 WIRE 1088 112 1088 -144 WIRE 1136 112 1136 64 WIRE 1136 112 1088 112 WIRE 240 128 240 112 WIRE 336 128 336 96 WIRE -64 176 -64 112 WIRE 1312 192 1312 -272 WIRE 1136 208 1136 112 WIRE 1200 208 1136 208 WIRE 1280 208 1200 208 WIRE 1392 224 1344 224 WIRE 1408 224 1408 64 WIRE 1408 224 1392 224 WIRE 240 240 240 208 WIRE 336 240 336 208 WIRE 336 240 240 240 WIRE 432 240 432 128 WIRE 432 240 336 240 WIRE 448 240 448 128 WIRE 448 240 432 240 WIRE 464 240 464 128 WIRE 464 240 448 240 WIRE 528 240 528 176 WIRE 528 240 464 240 WIRE 608 240 608 176 WIRE 608 240 528 240 WIRE 640 240 608 240 WIRE 752 240 720 240 WIRE 1184 240 752 240 WIRE 1280 240 1184 240 WIRE 1136 256 1136 208 WIRE 752 272 752 240 WIRE -64 368 -64 256 WIRE 48 368 48 144 WIRE 48 368 -64 368 WIRE 752 368 752 336 WIRE 752 368 48 368 WIRE 816 368 816 144 WIRE 816 368 752 368 WIRE 992 368 992 144 WIRE 992 368 816 368 WIRE 1136 368 1136 336 WIRE 1136 368 992 368 WIRE 1312 368 1312 256 WIRE 1312 368 1136 368 WIRE -64 384 -64 368 FLAG -64 384 0 FLAG -32 -48 in FLAG 800 -48 sw FLAG 1024 -48 led FLAG 1200 208 isense FLAG 1184 240 iref FLAG 1392 224 ifb FLAG 384 80 cmp- FLAG 384 112 cmp+ FLAG 656 96 gate SYMBOL Comparators\\LT1719 448 32 R0 WINDOW 0 27 27 Left 2 WINDOW 3 -92 6 Left 2 SYMATTR InstName U1 SYMBOL res 320 112 R0 WINDOW 0 41 34 Left 2 WINDOW 3 35 64 Left 2 SYMATTR InstName R2 SYMATTR Value 10K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL ind 960 -64 R90 WINDOW 0 63 51 VBottom 2 WINDOW 3 -27 53 VTop 2 SYMATTR InstName L1 SYMATTR Value 100µ SYMATTR SpiceLine Ipk=1.3 Rser=0.15 Rpar=0 Cpar=0 SYMBOL res 1120 240 R0 WINDOW 0 40 39 Left 2 WINDOW 3 39 70 Left 2 SYMATTR InstName R4 SYMATTR Value 1.5 SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL res 224 -32 R0 WINDOW 0 -35 19 Left 2 WINDOW 3 -45 46 Left 2 SYMATTR InstName R3 SYMATTR Value 10K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL schottky 832 144 R180 WINDOW 0 -45 30 Left 2 WINDOW 3 -127 -3 Left 2 SYMATTR InstName D2 SYMATTR Value MBRS130L SYMATTR Description Diode SYMATTR Type diode SYMBOL pmos 768 0 M270 WINDOW 0 25 128 VLeft 2 WINDOW 3 69 92 VLeft 2 SYMATTR InstName M1 SYMATTR Value AO6407 SYMBOL voltage -64 160 R0 WINDOW 0 11 100 Left 2 WINDOW 3 38 54 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 -185 81 Left 2 SYMATTR InstName V3 SYMATTR Value 12 SYMBOL res -80 16 R0 SYMATTR InstName R8 SYMATTR Value 0.001 SYMBOL zener 544 176 R180 WINDOW 0 37 29 Left 2 WINDOW 3 68 -5 Right 2 SYMATTR InstName D1 SYMATTR Value UMZ5_1N SYMBOL res 320 -32 R0 WINDOW 0 40 7 Left 2 WINDOW 3 37 33 Left 2 SYMATTR InstName R1 SYMATTR Value 10K ========== REMAINDER OF ARTICLE TRUNCATED ==========