3-A Isku-dhafan Wareeg-Hoos-u-Beddelaha Korantada Isku-dhafan IC LMR33630BQRNXRQ1
Sifooyinka Alaabta
NOOCA | SHARAXA |
Qaybta | Wareegyada isku dhafan (ICs) |
Mfr | Qalabka Texas |
Taxane | Gawaarida, AEC-Q100 |
Xidhmada | Cajalad & Gariir (TR) |
SPQ | 3000 T&R |
Xaaladda Alaabta | Firfircoon |
Shaqada | Hoos-u-dhac |
Habaynta wax soo saarka | Wanagsan |
Topology | Buck |
Nooca wax soo saarka | la hagaajin karo |
Tirada Waxsoosaarka | 1 |
Voltage - Gelida (min) | 3.8V |
Voltage - Gelida (Max) | 36V |
Voltage - Soo-saarka | 1V |
Voltage - Wax soo saarka (Max) | 24V |
Hadda - Wax-soo-saarka | 3A |
Soo noqnoqda - Beddelka | 1.4MHz |
Dib-u-habayn isku xidhan | Haa |
Heerkulka shaqada | -40°C ~ 125°C (TJ) |
Nooca Koritaanka | Dusha sare, garab qoyan |
Xidhmada / Kiis | 12-VFQFN |
Xidhmada Aaladda Bixiyaha | 12-VQFN-HR (3x2) |
Lambarka Alaabta Saldhigga | LMR33630 |
1.
Hawsha beddelaha buck-ku waa in la dhimo korantada wax-soo-gelinta oo la waafajiyo culeyska.Topology-ga aasaasiga ah ee beddelaha buck-ku waxa uu ka kooban yahay furaha ugu muhiimsan iyo beddelka diode ee la isticmaalo xilliga nasashada.Marka MOSFET ay ku xiran tahay si la mid ah diode joogto ah, waxaa loo yaqaan beddelka buck-ka isku-dhafka ah.Hufnaanta qaabka beddelka buck-ka ayaa ka sarreeya beddelayaashii hore ee buck-ga sababtoo ah isku-xidhka barbar-dhigga MOSFET-ka-hooseeya ee Schottky diode.Jaantuska 1 wuxuu muujinayaa jaantuska beddelka buck-ga isku-dhafka ah, kaas oo ah qaabka ugu badan ee maanta loo isticmaalo kombayutarada miiska iyo buug-yaraha.
2.
Habka xisaabinta aasaasiga ah
Furayaasha transistor-ka ee Q1 iyo Q2 labaduba waa MOSFET-yada N-channel.Labadan MOSFET waxaa inta badan loo tixraacaa furayaasha dhinac-sare ama hooseeya iyo MOSFET-ta hoose waxay ku xiran tahay isbarbar-dhigga Schottky diode.Labadan MOSFETs iyo diode ayaa ka dhigaya kanaalka ugu muhiimsan ee beddelaha.Khasaaraha qaybahan ayaa sidoo kale qayb muhiim ah ka ah wadarta khasaaraha.Baaxadda shaandhada LC ee wax soo saarka waxaa lagu go'aamin karaa korantada hadda jirta iyo ripple.Iyada oo ku xidhan PWM gaarka ah ee loo isticmaalo kiis kasta, shabakadaha iska caabinta jawaab celinta R1 iyo R2 waa la dooran karaa oo aaladaha qaar waxay leeyihiin habayn macquul ah oo lagu dejinayo tamarta wax soo saarka.PWM waa in lagu doortaa iyadoo loo eegayo heerka korantada iyo waxqabadka hawlgalka ee inta jeer ee la rabo, taas oo macnaheedu yahay in marka soo noqnoqda la kordhiyo, loo baahan yahay in la helo awood ku filan oo wadista albaabada MOSFET, taas oo ka kooban tirada ugu yar ee qaybaha loo baahan yahay. looguna talagalay beddelaha buck-ka caadiga ah.
Naqshadeeyuhu waa inuu marka hore fiiriyaa shuruudaha, ie gelinta V, wax soo saarka V iyo I soo saarista iyo sidoo kale shuruudaha heerkulka hawlgalka.Shuruudahan aasaasiga ah ayaa markaa lagu daraa socodka korantada, inta jeer, iyo shuruudaha cabbirka jireed ee la helay.
3.
Doorka kor-u-qaadista topologiyada
Buck-boost topologies waa wax la taaban karo sababtoo ah korantada wax soo saarka waxay noqon kartaa mid yar, ka weyn, ama la mid ah korantada wax soo saarka iyada oo u baahan koronto wax soo saar ka weyn 50 W. Awoodaha wax soo saarka ee ka yar 50 W, beddelaha hal-dhammeedka aasaasiga ah (SEPIC) ) waa ikhtiyaar aad u qiimo badan maadaama ay isticmaasho qaybo yar.
Beddelayaasha Buck-boost waxay ku shaqeeyaan qaab buck marka danabku uu ka weyn yahay korantada wax soo saarka iyo habka kor u qaadista marka danabku uu ka yar yahay tamarta wax soo saarka.Marka beddeliyuhu ka shaqeeyo gobolka gudbinta halkaas oo korantada wax-soo-gelinta ahi ay ku jirto xadka korantada wax-soo-saarka, waxaa jira laba fikradood oo lagula tacaalayo xaaladahan: midkoodna heerka lacagta iyo kor u qaadida waa firfircoon yihiin isku mar, ama wareegyada wareejintu waxay beddelaan inta u dhaxaysa buck. iyo kor u qaadida heerarka, mid kastaa sida caadiga ah wuxuu ku shaqeeyaa kala badh inta jeer ee beddelka caadiga ah.Fikradda labaad waxay keeni kartaa qaylo-hoosaadka wax-soo-saarka, halka saxnaanta korantada wax-soo-saarka laga yaabo inay ka yar tahay sax marka loo eego lacagta caadiga ah ama kor u qaadista hawlgalka, laakiin beddeliyuhu wuxuu noqon doonaa mid waxtar badan marka la barbardhigo fikradda koowaad.