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LM317 adjustable Umlawuli zamanje

Three-esibulalayo adjustable Umlawuli LM317 inikeza umthwalo samanje 100 ma. okukhipha voltage range 1.2 kuya 37 V. Le divayisi Kulula kakhulu ukusebenzisa futhi kudinga kuphela yebhangqa resistors zangaphandle ukuthi ukunikeza lo voltage okukhiphayo. Plus, nokuntengantenga nemingcele asetshenziwe ongakhetha ungcono onobuhle ufana ezihleliwe supply voltage ngesikhathi okukhiphayo.

incazelo

LM317 - voltage isimame zamanje okuyinto isebenta ngisho nalapho unqamukile ukulawula pin ADJ. Ngo operation evamile, idivayisi akudingeki ukuba exhunywe kwi-capacitor ezengeziwe. Wenza okuhlukile kwenziwa uma idivayisi ngaleso amabanga amade uma liya kusukela eyinhloko ugesi zokuhlunga. Kulokhu, ukufakwa okwakufuneka capacitor okokufaka dlula.

Okukhiphayo Analogue evumela ukuba uthuthukise ukusebenza zamanje Regulator LM317. Ngenxa yalokho, kukhuphuke umfutho futhi eziphelayo yezwakala ukubaluleka Coefficient bushelelezi. Leyo sibalo elilungile nzima ukufeza ezintathu-esibulalayo nezinye analogue.

Injongo zedivayisi olucutshungulwayo akuyona kuphela indawo stabilizers ne esinqunyiwe okukhipha inkomba, kodwa eziningi ezahlukahlukene kwezicelo. Ngokwesibonelo, LM317 zamanje Umlawuli ingasetshenziswa nge high-amandla izifunda. Kulesi simiso iyunithi ngabanye inomthelela umehluko phakathi voltage input bese okukhipha. Ukusebenza idivayisi kule modi angaqhubeka unomphela, kuze kube nomehluko phakathi amazinga ezimbili (voltage input bese okukhipha) aseqi iphuzu esiphezulu ovumelekile.

Izici

Kuyaphawuleka ukuthi LM317 Umlawuli zamanje kufanelekile elula adjustable ishayela yomculo. Zingasetshenziswa njengoba isimame ngokunemba, ngokuxhuma Resistor esinqunyiwe phakathi okukhiphayo ezimbili.

Ukudala supply eminye imithombo usebenze-non-eliqinile le esifushane izifunda, okwabangelwa iqhakambisa inkomba voltage phezu okukhiphayo elawula uhlelo. Uhlelo ugcina kuye ekungeneni uhla 1.2 volts, ngoba iningi umthwalo lincane kakhulu. Futhi zamanje Regulator LM317 voltage Transistor senziwa ejwayelekile TO-skeleton 92 Imodi okushisa yokusebenza ezisukela -25 kuya +125 degrees Celsius.

izici

ithuluzi Okubukwe kahle zokuhamba ukuklanywa amabhlogo elula ezilungisiwe segezi. Amapharamitha lingasethwa futhi isilungisiwe ngokuya umthwalo.

Steering yamanje LM317 isimame has izici ezilandelayo:

  • Lokukhipha voltage range - kusuka volts 1.2 kuya 37.
  • Umthwalo yamanje esiphezulu - 1.5 A.
  • Kukhona isivikelo izifunda okufutshane.
  • Kukhona fuse wesifunda okweqile.
  • Lesi Iphutha on the voltage okukhiphayo akuyona ezingaphezu kuka-0.1%.
  • Leli bhokisi IC chip - uhlobo TO-220, UKUZE-3 noma D2PAK.

Ukushayela isimame samanje LM317

Njalo lapho idivayisi okukhulunywa isetshenziswa LED segezi. Ngaphezu kwalokho siveza wesifunda elula lapho Resistor kanye chip icushiwe.

Ngesikhathi okokufaka umthombo wamandla voltage ihlinzekwa, kanti imininingwane esemqoka ixhunywe nokukhishwa kwe-analog usebenzisa Resistor. Ngaphezu kwalokho, uquqaba kwenzeka ne anode we LED. Ethandwa kakhulu wamanje wesifunda LM317 isimame njengalelo ezichazwe ngenhla, isebenzisa le ndlela elandelayo: R = 1/25 / I. Where I - yidivayisi okukhipha zamanje, ububanzi bayo uyahluka 0, 01-1.5 A. Resistor kuvunyelwe ngobukhulu 0, 8-120 ohms. Kwashabalala amandla Resistor ibalwa ifomula: R = IxR (2).

Ulwazi etholakale is babanjwa. resistors Fixed ekhiqizwa nge ukusabalala encane ukumelana sokugcina. Lokhu kuthinta irisidi izinkomba yokukhokha. Ukuxazulula lenkinga, kule scheme, i eliletha ukuthula Resistor amandla eyengeziwe edingekayo.

Izinzuzo nezingozi nebubi

Prakthiza ebonisa ukuthi amandla ukusebenza kwe-Resistor kungcono ukwandisa ngobukhulu ukuhlakazwa at 30%, futhi ongaphakeme Ukubika Inkinga YeWindows gumbi - at 50%. Ngaphandle eziningi eziwusizo, LM317 LED Umlawuli yamanje ayinalo nemiphumela ethile engathandeki ambalwa. Phakathi kwabo:

  • kahle Amancane.
  • Isidingo ukususa ukushisa kusukela ohlelweni.
  • AC Ukuqina ku-20% yenani mkhawulo.

Gwema izinkinga ukusebenza idivayisi izosebenzisa nabalawuli ukushintsha.

Kuyaphawuleka ukuthi uma ufuna kokuxhuma ephezulu amandla LED iyunithi nomthamo milliamps 700 edingekayo ukubala ukubaluleka ifomula: R = 1, 25/0, 7 = 1.78 ohms. Amandla ukushabalalisa kuyoba ngokulandelana 0, 88 Watts.

uxhumano

Ukubalwa LM317 Umlawuli wamanje kusekelwe izindlela eziningana uxhumano. Ngezansi kukhona izikimu eziyisisekelo:

  1. Uma usebenzisa amandla Transistor izinhlobo Q1, ungathola ngaphandle heatsink micro okukhipha samanje 100 ma. Kwanele ukulawula Transistor. Njengoba inetha zokuvikeleka ezivela icala ngokweqile D1 futhi D2 asetshenziswa diodes avikelayo, futhi parallel capacitor electrolytic inomsebenzi ukwehlisa umsindo omkhulu ovela ngemuva. Uma usebenzisa Q1 Transistor, esiphezulu okukhipha umthamo idivayisi 125 Watts.
  2. Kwesinye design inikeza elinganiselwe ukunikezela wamanje kanye operation esitebeleni of LED. umshayeli Special ikuvumela ukuba amandla izingxenye umthamo kusuka 0, 2 Watts 25 volts.
  3. Kwesinye design isicelo voltage ukwehlisa transformer kusukela variable inethiwekhi kusukela 220 Watts 25 Watts. Ngosizo kwebhuloho diode AC voltage uguqulwe ube isilinganiso unomphela. Ngaphezu kwalokho, wonke amaphutha eshelelayo ngenxa capacitor C1 uhlobo enikeza operation esitebeleni umlamuli voltage.
  4. Wiring Umdwebo olandelako ingenye elula. Voltage enikeziwe kusukela yesibili emazombezombe we transformer 24 volts, is kuyalungiswa ngenkathi bedlula lemifanekiso futhi etholwe izinga Ukukhishwa njalo 80 volts. Lokhu ugwema adlula ubukhulu supply voltage embundwini.

Kuyaphawuleka ukuthi ishaja elula ibhethri kungabuye eqoqwe ngesisekelo chip ngaphansi ukucatshangelwa zedivayisi. Njengoba yenziwe ngu ejwayelekile komugqa Umlawuli adjustable okukhipha voltage inkomba. Ngo indima efanayo zingasebenzi kudivayisi microassembly.

analogs

Inamandla isimame LM317 enezinto eziningi analogue ezimakethe ezifuywayo angaphandle. Isenzakalo esidume kunazo zonke kulo bayizinkulungwane brand ezilandelayo:

  • Domestic ukuguqulwa KR142 futhi KR115 EN12 EN1.
  • GL317 imodeli.
  • Ukuhluka SG31 futhi SG317.
  • UC317T.
  • ECG1900.
  • SP900.
  • LM31MDT.

Izibuyekezo

Njengoba kufakazelwa lobuya abasebenzisi, umlamuli yokubika ubhekana imisebenzi yayo. Ikakhulukazi uma kuziwa lokuhlangnanisa oluxube LED, voltage ukuze volts 50. Lula ukugcinwa kanye nokusebenza kwezimiso insimbi kanye nokwenzeka ukulungisa uxhumano emaqhingeni ezahlukene. Gripe kulo mkhiqizo iyatholakala ngomqondo wokuthi uhla kanye supply voltage ekhishwe ngaye elinganiselwe umkhawulo iziqondiso.

Ekupheleni

Ashintshekayo isimame ebalulekile uhlobo LM317 ekahle Umklamo elula amandla kagesi, kuhlanganise izingxenye kanye izingxenye ezisele for izimpahla ezisebenza ngogesi, ifakwe ezihlukahlukene okukhipha nemingcele. Le divayisi kungaba predetermined wamanje kanye voltage noma ezilawulwayo wabonisa izici. Ukuze kube lula ukubala, bhukwana liqukethe wokubala isimame ekhethekile ikuvumela ukuthi ukhethe isikimu kwesokudla futhi ukucacisa kungenzeka yokujwayela.

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