LM317 Regulator adjustable yangoku

Three-terminal adjustable Regulator LM317 inika umthwalo yangoku 100 Ma. imveliso uluhlu ombane ngu 1.2 ukuya 37 V. Le fowuni Kulula kakhulu ukuyisebenzisa kwaye kufuna kuphela iperi resistors yangaphandle ezinika ombane kwimveliso. Plus, xenga kwe parameters zokusebenza ineenketho ngcono imifuziselo ezinokuthelekiswa kunye ombane yonikezelo busisigxina imveliso.

incazelo

LM317 - ombane kunye somfanekiso okhoyo usebenza naxa kobonelelo adj ulawulo pin. Ukusebenza eziqhelekileyo, isixhobo akuyomfuneko ukuba kuqhagamshelwa capacitor olongezelelweyo. An ngaphandle lwenziwa xa ifowuni kumgama elingeneyo lokuqala filter umbane. Kulo mzekelo, ukufakelwa eyayifuneka capacitor input bypass.

Imveliso ye-analogu ivumela ukuphucula intsebenzo LM317 komlawuli yangoku. Ngenxa yoko, ukwanda ngamandla kunye nexabiso yama- otshintsho ngumlingani emlungisa. Enjalo kangangoko inani kunzima ukufikelela kwezinye analogue ezithathu-terminal.

Injongo device ethathelwa ingqalelo ayikho kuphela ukutshintshwa ekwenzeni kunye fixed isibonisi imveliso, kodwa ngokubanzi izicelo. Umzekelo, LM317 yangoku alawulayo zingasetyenziswa kunye kwiisekethe ophezulu ngamandla. Kule nkqubo unit ngamnye iphembelela umahluko phakathi igalelo kunye neziphumo ombane. Ukusebenza isixhobo kule imo ukuze kuqhubeka ngonaphakade, kude umahluko phakathi amazinga amabini (igalelo kunye neziphumo ombane) ayidluli ingongoma eliphezulu avumelekile.

iimpawu

Kubalulekile ukuphawula ukuba LM317 somlawuli ngoku ilungele ukuba elula isixhobo ukubetha adjustable. Ukuba zingasetyenziswa njenge somfanekiso ngqo, ngokudibanisa resistor esisigxina phakathi iziphumo ezimbini.

Ukudala imithombo yonikezelo yesibini ukusebenza kwi non-elide elifutshane-iisekethe, wenza kwenzeka ngokukuthembela kwizalathisi ombane kwinkqubo yolawulo imveliso. Le program ugcina naye emnyangweni ukuya uluhlu 1.2 volts, kuba uninzi umthwalo lincinane kakhulu. Yaye transistor Regulator LM317 ombane langoku lwenziwe ngendlela eqhelekileyo TO-skeleton 92 mode of amaqondo obushushu yokusebenza ukusukela kuma -25 ukuya +125 degrees Celsius.

iimpawu

isixhobo kujongwa ezingafanelanga ngokugqibeleleyo zocwangciso ngeebhloko ezilula kunye nezinto namandla kulawulwa. Imida zingasetwa yalungiswa ngokwemigaqo umthwalo.

Steering zangoku kwi LM317 somfanekiso neneempawu zilandelayo:

• Isiphumo uluhlu ombane - ukusuka volts 1.2 ukuya 37.
• Umthwalo idlalayo ubuninzi - 1.5 A.
• Kukho zokuzikhusela iziphaluka elifutshane.
• Kukho circuit fuse ukuba nobushushu.
• Impazamo kwi ombane yemveliso ayikho ngaphezu kwe-0.1%.
• Izindlu IC chip - uhlobo TO-220, TO-3 okanye D2PAK.

Driving somfanekiso yamanje LM317

Njalo nje isixhobo ekuthethwa lisetyenziswa izinto ngamandla LED. Ngaphezu koko ke lizisa isekethe elula apho resistor kunye chip iyasebenza.

Xa igalelo umthombo wamandla ombane ikhutshwa, kunye nomfowunelwa eyintloko liqhagamshelene analog usebenzisa resistor. Ngokubhekele phaya, udibaniso kwenzeka kunye anode le LED. Eyona ethandwayo yangoku somfanekiso LM317 wesiphaluka njengoko kuchaziwe apha ngasentla, usebenzisa le ndlela ilandelayo: R = 1/25 / I. Apho I - na isixhobo imveliso lwangoku, uluhlu yayo uyahluka 0, 01-1.5 A. Resistor luvumelekile ubukhulu 0, 8-120 ohms. Dissipated resistor amandla ibalwa yi wokubala: R = IxR (2).

Ingcaciso efunyenweyo lirhangqwa. resistors Fixed enziwa a twa encinane ukumelana lokugqibela. Oku kuchaphazela irisithi kwezalathisi intlawulo. Ukuze kulungiswe le ngxaki, kule nkqubo, i-resistor amandla eyongezelelweyo kwaba efunekayo.

Ubuhle nobubi

Practice ibonisa ukuba amandla ukusebenza resistor kubhetele ukwandisa ubukhulu eziziintsali kwi-30%, kwaye පිළිතුරු iimpendulo kwikompatimenti eliphantsi - kwi-50%. Ngaphandle kwiqela lokulungileyo, LM317 LED alawulayo ngoku uye kuneengxaki ezimbalwa. Phakathi kwabo:

• ukusebenza Small.
• Imfuneko ukususa ubushushu ukusuka kwinkqubo.
• AC sinjalo kwama-20% yexabiso umda.

Ziphephe iingxaki nokusebenza isixhobo iya kusebenzisa regulators kokusebenzisa.

Kubalulekile ukuqaphela ukuba xa ufuna ukudibanisa eliphezulu-amandla LED unit amandla milliamps 700 ezifunekayo ukubala ixabiso olungumgubo: R = 1, 25/0, 7 = 1.78 ohms. Power ukusasaza iya kuba ngokulandelelanayo 0, 88 watts.

uqhagamshelo

Calculation LM317 Regulator yangoku isekelwe kwiindlela ezininzi lonxibelelwano. Apha ngezantsi kukho izikimu ezisisiseko:

1. Ukuba usebenzisa iintlobo amandla transistor Q1, ungafumana ngaphandle heatsink micro imveliso yangoku 100 Ma. Kwanele ukuba ukulawula transistor. Njengoko umnatha lezokhuseleko kwentlawulo ngokugqithiseleyo D1 kunye D2 asetyenziswa ode zokuzikhusela, yaye capacitor parallel electrolytic unawo umsebenzi zokunciphisa ingxolo. Xa usebenzisa q1 transistor, amandla imveliso ubuninzi isixhobo 125 Watts.
2. Kwenye uyilo inikeza unikezelo olulinganiselweyo ngoku kunye nokusebenza nzile LED. umqhubi Special ikuvumela ukuba amandla amasuntswana amandla ukusuka kwi-0, iiwathi ezingama-2 ukuya volts 25.
3. Kwenye uyilo isicelo ombane yandisa sombane ukusuka kuthungelwano bume ukususela 220 watts ukuya Watts 25. Ngoncedo kwebhulorho diode AC ombane uguqulwe ngomlinganiselo esisigxina. Ngaphezu koko, bonke amaphutha mpuluswa ngenxa uhlobo C1 capacitor olunika intsebenziswano ezinzileyo ye umlawuli ombane.
4. Lo mzobo kweentambo ilandelayo yenye yezona ilula. Le ombane zinikwe ezizisekondari nosuka le transformer volts-24, ukuba kuyalungiswa xa edlula icebo lokucoca kwaye ifunyenwe komlinganiselo kunikezelo rhoqo 80 volts. Oku kuthintela kakhulu embundwini yonikezelo ombane eliphezulu.

Kubalulekile ukuphawula ukuba kwitshaja ibhetri elula nayo kuqokelelwa ngokusekelwe chip ethathelwa ingqalelo kwefowuni. Ilungiswe yi Regulator yomgama eqhelekileyo ngesalathisi output ombane adjustable. Xa indima efanayo lingasebenza isixhobo microassembly.

analogs

Enamandla somfanekiso LM317 lineqela analogue kwiimarike basekhaya angaphandle. Eyona idumileyo ezi iintlobo zilandelayo:

• KR142 ukuguqulwa basekhaya KR115 EN12 EN1.
• model GL317.
• Imidlalo SG31 kunye SG317.
• UC317T.
• ECG1900.
• SP900.
• LM31MDT.

reviews

Njengoko sinokungqinelwa nengxelo evela kubasebenzisi, umlawuli ingxelo alwa kunye nemisebenzi yayo. Ingakumbi xa kuziwa udibaniso iziqalelo LED, i-ombane volts-50. Lula ukugcina kunye nokusebenza isixhobo kunye namathuba yokulungisa uxhulumaniso xa nezikmu ezininzi nezahlukeneyo. Gripe kule mveliso ifumaneka ngengqiqo ethi uluhlu nonikezelo ombane ekhutshelwe yena imimiselo mda elilinganiselweyo.

Ekupheleni

Adjustable somfanekiso ezifunekayo uhlobo LM317 ilungele kuyilo izinto zamandla ezilula, kubandakanywa amacandelo kunye iintsimbi izixhobo zekhompyutha, mayixhotyiswe ezahlukeneyo parameters kwimveliso. Esi sixhobo ingaba ngozi zangoku kunye ombane okanye kulawulwa lubonise iimpawu. Kuba lula ukubala, le ncwadana iqulethe calculator somfanekiso okhethekileyo ikuvumela ukuba ukhethe icebo ekunene ukujonga amathuba zivumelane.