Kuwongolera Kwathunthu kwa LM317 Kutumiza: Zambiri, Makhalidwe, Ndi Mapulogalamu Awo
2023-12-01 7477

Kataloji

A LM317 Ndi chip cha magetsi pafupipafupi m'mabwalo, omwe amadziwika kuti amatulutsa magetsi.Wowongolera wowongolera uyu akuyenera kusiyanasiyana pamagetsi, monga mabwalo ozungulira, mabwalo a analog, ndi zida zolondola.LM317 imapereka mphamvu yotayirira yomwe imathandizira kusiyanitsa pakati pa zotulutsa ndi zotulutsa, zomwe zili ndi udindo wabwino komanso malamulo a mzere.

LM317 ndi chiyani?

LM317 ndi njira yosinthika yosinthika yomwe ikugwiritsa ntchito magetsi okhazikika, kulola kusintha kwa magetsi kudzera pazakunja kwa kunja.Zimagwiritsidwa ntchito mosiyanasiyana m'mabwalo osiyanasiyana ngati wowongolera, kupereka zotulutsa zokhazikika zamagetsi komanso zimateteza masitepe osokoneza bongo kuchokera kusinthidwe magetsi.

Penti ya LM317

Chithunzi 1: LM317 IMUTE

Kuyang'ana pa volturmator kuchokera kutsogolo, pini yoyamba kumanzere ndi adj

Kuyika (Vin): Vin ndi pini yomwe imalandira magetsi olowetsa, omwe adzakonzedwa ku voliyumu inayake.

Kutulutsa (vout): Viout ndi pini yomwe imapereka mawu okhazikika.Imapereka magetsi osinthika, omwe amaphatikizidwa ndi zigawo zomwe zimafunikira magetsi a magetsi.

Kusintha (adj): adjPini iyi nthawi zambiri imalumikizidwa ndi munthu wotsutsana ndi pini yotulutsa kuti ikhazikitse magetsi otulutsa.

Makhalidwe a LM317

Kutulutsa mphamvu yamagazini: Kusintha kuchokera pa 1.25V mpaka 37V.

Kutulutsa mawu: okhoza kupulumutsa 1.5a wa zotulukapo.

Makina osokoneza bongo otulutsa: Okwanira 40V, koma njira yotsimikizika ndi 3V mpaka 15V ya 15v ya 15V ya 15v ya 15V ya 15v ya 15V ya 15v ya 15V ya 15v ya 15V ya 15v yokwanira kukhazikika.

Kutulutsa kokwanira pamakono pa 15V njira: 2.2a.

Kukhazikika kwa matenthedwe: kumakhala kokhazikika mkati mwa kutentha kwa 0 mpaka 125 ° C.

Kulemba: Kupezekanso ku-220, ST223, ndi-263, pakati pa ena.

Katundu wa katundu: nthawi zambiri 0.1%.

Regemula: Nthawi zambiri 0,01% / v.

RupPr Reserse: 80 DB.

Pulogalamu Yosintha Panopa: Makhalidwe ofanana kuyambira 50μa mpaka 100μa.

Kuteteza kutentha kwa kutentha: mawonekedwe otsekeka kuteteza kuti athe kuwonongeka chifukwa cha kutentha.

Chitetezo chofupikirana: chimaphatikizaponso malire amkati mwa nthawi yayifupi.

Mfundo yoyang'anira LM317

Chithunzi 2: LM317 Yogwira Ntchito

Mfundo yogwira ntchito ya LM317 imazungulira kuti ikhale magetsi osungunuka nthawi zonse.Ili ndi magetsi amkati mokhazikika, nthawi zambiri 1.25 volts, yomwe imakhala ngati benchmark chifukwa chosintha magetsi otulutsa.Mwa kusintha mtengo wotsutsana wa R2, mphamvu ya magetsi pakati pa matele oyenda ndi adj itha kusinthidwa, posintha magetsi otulutsa mawu.Kukhalapo kwa capoctors C1 ndi C2 kumatsimikizira ntchito yolimba ya dera, kuchepetsa kusinthasintha kwa voliyumu ndi phokoso.Mwa kusankha bwino za R1 ndi R2, ogwiritsa ntchito amatha kukhazikitsa magetsi ofunikira 1.25 Volutsi ku ma volts angapo ma volts angapo pakugwiritsa ntchito.

Izi ndi mwayi wa magetsi osinthika;Mutha kuyankha ku magetsi aliwonse mu mtundu wovomerezeka wa regilator.

Chidziwitso: Casoctors C1 ndi C2 amagwiritsidwa ntchito poyeretsa mphamvu.C1 ndiosankha ndipo nthawi zambiri amagwiritsidwa ntchito poyankha.Komabe, C2 ndiyofunikira pamene chipangizocho chikakhala kutali ndi ma cavioctors aliwonse osema, chifukwa chimathandizira osasunthika m'matumbo pazochitika zapano.

Kutsutsa / kuwerengetsa kwa LM317

Chithunzi 3: LM317 Vombo

Mutha kugwiritsa ntchito njira yotsatirayi kuwerengera mphamvu ya magetsi (vout), yomwe imadalira mfundo za kunja kwa EN1 ndi R2.

Vout = 1.25V (1 + R2 / R1)

Nthawi zambiri, mtengo wa R1 umakhazikika pa 240 ohms (olimbikitsidwa), koma amathanso kukhazikitsa pakati pa 100 ndi 1000 ohms.Kenako, muyenera kuyika mtengo wa R2 kuti mugwiritse ntchito magetsi otulutsa mphamvu.Pankhaniyi, ngati R2 ikugwiritsa ntchito 1000 ohms, njira imakwaniritsa motere:

Vout = 1.25x (1 + 1000/240) = 6.453V

Mofananamo, mutha kuwerengera mtengo wa R2 pogwiritsa ntchito njira yomweyo.Ngati mwakhazikitsa magetsi anu ku 10v, ndiye kuti mutha kuwerengera mtengo wa R2 motere:

10 = 1.25x (1 + R2 / 240) => R2 = 1680

Tsopano tiyeni tiwone chitsanzo chogwiritsa ntchito LM317:

Chithunzichi pansipa chikuwonetsa Mtumiki wa LM317 wolumikizidwa kudera, ndikufuna kupereka zotulutsa za DC Volsinege yoyambira.

Chithunzi 4: LM317 Mlankhulidwe

M'magawowa, timawonjezera gwero la magetsi pa van pini ya wolamulira.Pini iyi imalandiranso magetsi olowera, omwe Chip idzayambiranso.Mphamvu yamagetsi yolowera pini iyi iyenera kukhala yapamwamba kuposa magetsi omwe amatuluka.Komabe, zindikirani kuti wowongolera amangosintha magetsi pamlingo winawake;Sizitero ndipo sitingapange magetsi pawokha.Chifukwa chake, kukwaniritsa voliyumu yamagetsi yotulutsa, Vin iyenera kukhala yokulirapo kuposa yoyendera.

M'magawo awa, timafunikira 5VDC ngati kutulutsa, kotero vin iyenera kukhala yopitilira 5 v. pokhapokha atakhala otsika kwambiri, mumafuna kuyika magetsi okwera pafupifupi 2V.Chifukwa chake, kuti titulutse 52, timatha kudyetsa 7 v mu wolamulira.

Pochita ndi pini yolowera, tsopano tikusunthira ku Pini yosinthika (adj).Popeza tikukhumba chizolowezi cha 5 v, tiyenera kuwerengera kuti phindu la R2 limatulutsa chikalata cha 5 v.

Kugwiritsa ntchito magetsi otulutsa:

Vout = 1.25V (1 + R2 / R1)

Popeza R1 ndi 240 ohms, motero:

5V = 1.25V (1 + r2 / 2402), kotero R2 = 720

Chifukwa chake, ndi mtengo wa R2 pa 720 ohms, ngati mupereka magetsi ophatikizika kuposa 5 v, LM317 idzatulutsa 5V.

Chithunzi 5: LM317 VIRIRE

Pini yomaliza ya LM317 ndi pini yotulutsa, ndikupereka madera omwe ali ndi mavolilo 5, timangolumikiza ndi pini yotulutsa.

Momwe Mungagwiritsire Ntchito LM317

Chigawo cha LM317 chimayang'anira kusiyana kwa 1.255V pakati pa zotulutsa ndi zikhomo.Mutha kusintha zotulukapo pogwiritsa ntchito zinthu ziwiri zogwirizana pakati pa kutulutsa ndi zikhomo.

Kuphatikiza apo, ma carpoctors awiri ophatikizika amatha kuphatikizidwa mudera.Kukhazikitsa kumathandiza kuthetsa kulumikizana kosafunikira komanso kumalepheretsa phokoso.

Wapolisi wa 1UF wolumikizidwa ndi kutulutsa kumathandizanso kuyankha.Kuphatikiza apo, mutha kugwiritsa ntchito ngati wothandizira kusinthasintha podina porntiometer pa pini yosinthika.

Otsutsa ndi Pontintiments amagwirira ntchito limodzi kuti apange kusiyana kwamphamvu kwa zovomerezeka.

Chithunzi 6: LM317 Chizindikiro cha Chigawo cha Live

Zofanana ndi LM317

Mitundu ina ku LM317 ikuphatikiza: LM7805, LM7806, LM7809, LM7812, LM7912, LM7912, LM117v33, ndi XC62063206322063222p33222063222063222p3322206322206322063220632063220632206222222222222222220232M5

Mitundu yofanana ndi LM317: LT1086, LM1117 (SMD), PB137, ndi LM337 (yolakwika yamagetsi).

Momwe Mungatetezere Dera la LM317

Kuteteza gawo la LM317 ndikofunikira kuti tipewe kuwonongeka.Chifukwa cha kuchuluka kwa mphamvu, zinthu zikuluzikulu zitha kunjenjemera pakugwira ntchito.Pachifukwa ichi, kutentha kumamizidwa nthawi zambiri kumagwiritsidwa ntchito kuteteza ic kuti ithe kutentha.Kuphatikiza apo, chifukwa cha zotsika za kusinthidwe, ma carmior akunja amatha kutulutsa.Chifukwa chake, ma diode amawonjezeredwa m'mapulogalamu ena kuti apange zotulutsa za capacilator.

DiiDD D1 imateteza captor kuti ichotse mabwalo apafupi, pomwe diide d2 imagwiritsidwa ntchito popereka njira yotsika yoteteza CADJ paza mabwalo afupiakulu.Kukwaniritsa kuchuluka kwakukulu, kudutsa ma terminal.

Chithunzi 7: Chithunzi cha LM317 Chitetezo

Mwachidule, LM317 ndi kachilombo kovomerezeka komwe kumapereka chipya chokhazikika chomwe chimapereka mphamvu yokhazikika pakuwongolera kusiyana pakati pa zotulutsa ndi zotulutsa.Pulogalamu yake ndi magawo ake amathandizira mainjiniya kuti agwiritse ntchito chip ndikusintha chip kuti mukwaniritse kudalirika kwa mphamvu ndi kudalirika.