Lub LM317 adjustable peb-terminal tam sim no regulator muab ib tug load ntawm 100 mA. Cov zis hluav taws xob ntau yog los ntawm 1.2 txog 37 V. Cov cuab yeej siv tau yooj yim heev thiab yuav tsum tsuas yog ob peb sab nraud resistors los muab cov zis voltage. Ntxiv rau, kev ua haujlwm tsis ruaj khov zoo dua li cov qauv zoo sib xws nrog cov khoom siv hluav taws xob ruaj khov.
Kev piav qhia
LM317 yog tam sim no thiab voltage regulator uas ua haujlwm txawm tias ADJ tswj tus pin raug txiav. Thaum lub sijhawm ua haujlwm ib txwm muaj, lub cuab yeej tsis tas yuav txuas nrog cov capacitors ntxiv. Ib qho kev zam yog qhov xwm txheej thaum lub cuab yeej nyob ntawm qhov deb deb ntawm cov thawj lim fais fab mov. Hauv qhov no, koj yuav tsum tau nruab ib lub input shunt capacitor.
Tso zis analog tso cai rau koj los txhim kho kev ua haujlwm ntawm LM317 tam sim no stabilizer. Yog li ntawd, qhov kev siv ntawm cov txheej txheem ib ntus thiab tus nqi ntawm ripple smoothing coefficient nce. Xws li ib qho kev pom zoo yog qhov nyuaj rau kev ua tiav hauv lwm qhov peb lub davhlau ya nyob twg.
Lub hom phiaj ntawm cov cuab yeej hauv nqe lus nug tsis yog xwbhloov cov stabilizers nrog tus nqi tso zis tas li, tab sis kuj rau ntau yam kev siv. Piv txwv li, LM317 tam sim no regulator yuav siv tau nyob rau hauv high voltage fais fab mov circuits. Nyob rau hauv cov ntaub ntawv no, tus kheej system ntawm cov cuab yeej cuam tshuam qhov sib txawv ntawm cov input thiab output voltage. Kev ua haujlwm ntawm cov cuab yeej hauv hom no tuaj yeem txuas mus ntxiv mus kom txog rau thaum qhov sib txawv ntawm ob qhov ntsuas (cov tswv yim thiab cov zis hluav taws xob) tshaj qhov siab tshaj plaws uas tau tso cai.
Ntse
Nws tsim nyog sau cia tias LM317 tam sim no stabilizer yooj yim rau kev tsim cov khoom siv mem tes hloov tau yooj yim. Lawv tuaj yeem siv los ua tus tswj xyuas qhov tseeb los ntawm kev sib txuas ib qho kev tiv thaiv ruaj khov ntawm ob qhov khoom tawm.
Tsim cov khoom siv hluav taws xob theem nrab ua haujlwm nrog cov tsis siv hluav taws xob luv luv tau dhau los ua tau vim qhov kev ua kom zoo ntawm qhov ntsuas hluav taws xob ntawm qhov kev tswj hwm qhov system. Qhov kev zov me nyuam khaws nws ntawm cov tswv yim tsis pub dhau 1.2 volts, uas yog me me rau feem ntau cov khoom thauj. LM317 tam sim no thiab voltage stabilizer yog tsim nyob rau hauv tus qauv TO-92 transistor core, kev khiav hauj lwm kub ntawm -25 mus rau +125 degrees Celsius.
Ntse
Cov cuab yeej hauv nqe lus nug yog qhov zoo heev rau kev tsim cov qauv tswj hwm yooj yim thiab cov khoom siv hluav taws xob. Hauv qhov no, qhov tsis tuaj yeem hloov kho thiab teev nyob rau hauv cov phiaj xwm thauj khoom.
Tus kho tau tam sim no stabilizer ntawm LM317 muaj cov lus qhia hauv qab no:
- tso zis voltage ntau - los ntawm 1, 2 txog 37 volts.
- Load tam sim no mus rau qhov siab tshaj plaws - 1.5 A.
- Muaj kev tiv thaiv tiv thaiv luv luv.
- Muab kev tiv thaiv Circuit Court fuses los tiv thaiv overheating.
- qhov yuam kev voltage tsawg dua 0.1%.
- Integrated circuit vaj tse - hom TO-220, TO-3 lossis D2PAK.
Circuit stabilizer ntawm LM317
Cov khoom siv feem ntau suav tias yog siv hauv cov khoom siv hluav taws xob LED. Cov hauv qab no yog ib qho yooj yim Circuit Court uas ib tug resistor thiab ib tug microcircuit koom.
Ib lub zog hluav taws xob hluav taws xob yog muab los ntawm cov tswv yim, thiab kev sib cuag tseem ceeb yog txuas nrog cov zis analogue nrog lub resistor. Tom ntej no, kev sib sau ua ke tshwm sim nrog lub anode ntawm LED. Qhov nrov tshaj plaws LM317 tam sim no regulator Circuit Court tau piav qhia saum toj no siv cov qauv hauv qab no: R=1/25 / I. Ntawm no kuv yog qhov tso zis tam sim no ntawm lub cuab yeej, nws qhov sib txawv ntawm 0.01-1.5 A. Lub resistor kuj tau tso cai rau qhov ntau thiab tsawg ntawm 0.8-120 Ohm. Lub zog dissipated los ntawm tus resistor yog xam los ntawm tus qauv: R=IxR (2).
Cov ntaub ntawv tau txais raug suav sau. Tsau resistors yog tsim nrog me me kis ntawm qhov kawg tsis kam. Qhov no cuam tshuam rau qhov tau txais cov ntsuas ntsuas. Txhawm rau daws qhov teeb meem no, ib qho ntxiv stabilizing resistor ntawm lub zog yuav tsum tau txuas nrog lub voj voog.
pros and cons
Raws li kev xyaum qhia, lub zog ntawm tus resistor ntawmkev ua haujlwm, nws yog qhov zoo dua los ua kom thaj tsam dispersion los ntawm 30%, thiab hauv qhov qis convection compartment - los ntawm 50%. Ntxiv nrog rau ntau qhov zoo, LM317 LED tam sim no stabilizer muaj ntau qhov tsis zoo. Ntawm lawv:
- Kev ua haujlwm me me.
- Yuav tsum tau tshem tawm cua sov ntawm qhov system.
- kev ruaj khov tam sim no tshaj 20% ntawm tus nqi txwv.
Kev siv cov tswj kev hloov pauv yuav pab kom tsis txhob muaj teeb meem hauv kev ua haujlwm ntawm lub cuab yeej.
Nws yog ib qho tsim nyog sau cia tias yog tias koj xav tau txuas lub zog LED muaj zog nrog lub zog ntawm 700 milliamps, koj yuav tsum suav cov txiaj ntsig siv cov qauv: R=1, 25/0, 7=1.78 TZS Lub zog dissipated yuav raws li 0.88 watts.
Kev sib txuas
Kev suav ntawm LM317 tam sim no stabilizer yog ua raws li ntau txoj kev sib txuas. Hauv qab no yog cov tswv yim tseem ceeb:
- Yog tias koj siv lub zog Q1 hom transistor, koj tuaj yeem tau txais tam sim no ntawm 100 mA ntawm cov zis yam tsis muaj microassembly heatsink. Qhov no yog txaus los tswj lub transistor. Raws li kev ruaj ntseg net tiv thaiv tus nqi ntau dhau, kev tiv thaiv diodes D1 thiab D2 yog siv, thiab ib qho kev sib txuas electrolytic capacitor ua haujlwm ntawm kev txo cov suab nrov nrov. Thaum siv transistor Q1, lub zog tso zis ntau tshaj plaws ntawm lub cuab yeej yuav yog 125W.
- Hauv lwm lub voj voog, kev txwv tam sim no thiab kev ua haujlwm ruaj khov ntawm LED tau muab. Tus neeg tsav tsheb tshwj xeeb tso cai rau koj kom muaj lub zog hluav taws xob nrog lub zog ntawm 0.2 watts txog 25 volts.
- Tus tsim tom ntej no siv lub kauj ruam-down transformervoltage los ntawm ib tug sib txawv network ntawm 220 W mus rau 25 W. Nrog kev pab los ntawm ib tug diode choj, lub alternating voltage yog hloov mus rau hauv ib tug qhov taw qhia tas li. Nyob rau tib lub sijhawm, txhua qhov kev cuam tshuam yog smoothed tawm los ntawm lub capacitor ntawm hom C1, uas ua kom ntseeg tau tias qhov voltage regulator tswj kev ua haujlwm ruaj khov.
- Cov txheej txheem txuas hauv qab no yog suav tias yog ib qho yooj yim tshaj plaws. Qhov hluav taws xob los ntawm qhov nruab nrab winding ntawm lub transformer ntawm 24 volts, yog rectified thaum dhau los ntawm lub lim, thiab ib tug tas li daim duab ntawm 80 volts yog tau ntawm cov zis. Qhov no zam dhau qhov siab tshaj qhov ntsuas hluav taws xob.
Nws tsim nyog sau cia tias lub charger yooj yim kuj tuaj yeem sib sau ua ke raws li microcircuit ntawm cov khoom hauv nqe lus nug. Tau txais tus qauv linear stabilizer nrog qhov ntsuas qhov ntsuas qhov ntsuas tau hloov tau. Lub microassembly ntawm lub cuab yeej tuaj yeem ua haujlwm zoo ib yam.
Analogues
Lub zog ruaj khov ntawm LM317 muaj ntau cov analogues hauv kev lag luam hauv tsev thiab txawv teb chaws. Cov nto moo tshaj plaws ntawm lawv yog cov npe hauv qab no:
- Kev hloov kho hauv tsev ntawm KR142 EH12 thiab KR115 EH1.
- Model GL317.
- SG31 thiab SG317 variations.
- UC317T.
- ECG1900.
- SP900.
- LM31MDT.
Reviews
Raws li tau pom los ntawm cov neeg siv tswv yim, lub stabilizer hauv nqe lus nug copes zoo nrog nws cov dej num. Tshwj xeeb tshaj yog thaum nws los txog rau kev sib sau ua ke nrog LED cov ntsiab lus, qhov hluav taws xob mus txog 50 volts. Simplifies lub txij nkawm thiab kev ua haujlwm ntawm lub cuab yeejkev hloov kho thiab kev sib txuas hauv cov txheej txheem sib txawv. Muaj kev tsis txaus siab txog cov khoom no hauv kev nkag siab tias qhov ntau ntawm cov zis thiab cov khoom siv hluav taws xob rau nws raug txwv los ntawm cov qauv siab tshaj plaws.
Lub LM317 kev tswj hwm kev sib koom ua ke yog qhov zoo tshaj plaws rau kev tsim cov khoom siv hluav taws xob yooj yim, suav nrog cov khoom siv hluav taws xob thiab cov khoom sib dhos nruab nrog ntau yam khoom siv. Cov no tuaj yeem yog cov khoom siv nrog qhov muab tam sim no thiab voltage, lossis nrog cov yam ntxwv kho tau. Txhawm rau ua kom yooj yim rau kev suav, cov lus qhia muab lub tshuab xam zauv tshwj xeeb uas tso cai rau koj xaiv cov phiaj xwm xav tau thiab txiav txim siab qhov ua tau ntawm kev hloov pauv.
