UC2843BD1013TR ic chip isku dhafka wareegga elektiroonigga semiconductor brand cusub oo asal ah hal meel iibso

1.LDO, ama maamule ka tagista hoose, waa nidaamiye toosan oo hooseeya oo adeegsada transistor ama tuubada saamaynta goobta (FET) ee ka hawlgasha gobolkeeda saturation si ay uga jarto korantada xad dhaafka ah ee korantada codsatay si ay u soo saarto koronto la habeeyey.
Afarta shay ee ugu waaweyn waa ka bixida, buuqa, saamiga Diidmada Supply Power (PSRR), iyo Quiescent Current Iq.
Qaybaha ugu muhiimsan: wareegga bilawga, unugga eexda isha joogtada ah, wareegga karti-gelinta, curiyaha hagaajinta, isha tixraaca, cod-weyneeye qalad, shabakadda iska caabbinta jawaab-celinta iyo wareegga ilaalinta, iwm.

2. Mabda'a Hawlgelinta
Wareegga aasaasiga ah ee LDO wuxuu ka kooban yahay nidaamiye VT taxane ah, muunadaha iska caabiyeyaasha R1 iyo R2, iyo cod-weyneeye isbarbardhigga A
Nidaamku waa la xoojiyaa, haddii pin-ku-shaqeeyaha uu ku jiro heer sare, wareeggu wuxuu bilaabmaa, wareegga isha ee joogtada ah wuxuu bixiyaa eexda wareegga oo dhan, korantada isha tixraaca si dhakhso ah ayaa loo aasaasay, iyo korantada wax-soo-saarka aan la xakameyn ayaa loo isticmaalaa sida korantada. ee korontada, danab tixraaca waxaa loo isticmaalaa sida danab galitaanka wajiga xun ee amplifier qaladka, network jawaab celinta resistor kala qaybiyaa danab wax soo saarka oo ay helaan danab jawaab-celinta, danab jawaab-celinta tani waa gelinaya in terminal isku mid ah terminal qalad barbardhigaan, iyo taban danab-celintani waxay gelisaa dhinaca isotropic ee isbarbardhigga khaladka oo marka la barbar dhigo danab tixraaceed taban.Farqiga u dhexeeya labada danab waxaa lagu xoojiyay cod-weyneeye qaladka si uu si toos ah u koontaroolo albaabka curiyaha korontadu hagaajinayo, wax soo saarka LDO-na waxaa lagu xakameynayaa iyadoo la beddelayo heerka korantada ee tuubada hagaajinta, sida Vout = (R1 + R2) / R2 × Vref
Nidaamiyaha toosan ee hooseeya ee dhabta ah wuxuu kaloo leeyahay hawlo kale sida ilaalinta wareegga gaaban ee culeyska, xirida korantada, xiritaanka kulaylka, ilaalinta xiriirka gadaal, iwm.

3.Faa'iidooyinka, khasaaraha, iyo heerka hadda
Korantada ka bixida hooseeysa (LDO) ee toosan waa qiimo jaban, buuq yar, hadda socda oo hooseeya, qaybo dibadeed oo kooban, badiyaa hal ama laba capacitors oo keliya, waxayna leeyihiin qaylo gaar ah oo aad u hooseeya iyo saamiga Diidmada Korontada sare (PSRR).LDO waa nidaam yar oo Chip ah (SoC) oo leh is-isticmaalka aad u hooseeya.Waxaa loo isticmaali karaa xakamaynta kanaalka ugu weyn ee hadda waxayna leedahay qalab isku dhafan oo isku dhafan sida MOSFETs oo leh iska caabin aad u hooseeya, Schottky diodes, muunad diidmo ah, iyo qaybiyeyaasha korantada, iyo sidoo kale ilaalinta xad-dhaafka ah, ilaalinta heerkulka xad-dhaafka ah, Ilaha tixraaca saxda ah, amplifiers kala duwan, dib-u-dhigayaasha, iwm. PG waa jiil cusub oo LDO ah oo leh is-tijaabin xaalad kasta oo wax soo saar ah iyo dib u dhac ku yimi sahay koronto badbaado leh, kaas oo sidoo kale loogu yeeri karo Power Good, ie "awood wanaagsan ama awood deggan" .Qaar badan oo LDO ah waxay u baahan yihiin hal capacitor oo kali ah gelinta iyo mid wax soo saarka si loogu shaqeeyo xasilloon.
LDO-yada cusub waxay gaari karaan qeexitaannada soo socda: sawaxanka wax soo saarka ee 30µV, PSRR ee 60dB, hadda quiescent ee 6µA, iyo hoos u dhaca danab ee 100mV oo keliya.Sababta ugu weyn ee kor loogu qaaday waxqabadka LDO ee toosanayaasha tooska ah ayaa ah in maamulaha la isticmaalo uu yahay kanaalka P-channel MOSFET, kaas oo korantadu ku shaqaynayso oo aan u baahnayn hadda, yaraynaysaa wakhtiga uu isticmaalo aaladda lafteeda iyo hoos u dhaca danab ku dhex jira.hoos u dhaca ayaa qiyaas ahaan la mid ah soosaarka hadda jira iyo iska caabinta.Hoos u dhaca korantada ee MOSFET waa mid aad u hooseeya sababtoo ah iska caabintiisa oo yar.Nidaamiyeyaasha tooska ah ee caadiga ah waxay isticmaalaan PNP transistors.Wareegyada leh transistor-ka PNP, hoos u dhaca danab ee u dhexeeya gelinta iyo soo saarista waa inuusan aad u hooseynin si looga hortago in transistor-ka PNP uu galo saturation oo uu yareeyo awoodda wax soo saarka.