Emkhakheni wokwakheka kwesifunda, ukukhetha amadivaysi afanele amagesi kuyisihluthulelo sokuqinisekisa ukusebenza okusebenzayo kwalo lonke uhlelo lokujikeleza.Imvamisa, abaklami ikakhulukazi babheka izinhlobo ezimbili zamadivayisi wamandla ekwakheni isizungu: DC / DC kanye ne-LDO.Lawa madivaysi amabili anezimpawu zawo kanye nezimo zabo zohlelo lokusebenza, kanye nokuqonda ukusebenza kwawo futhi izimo ezisebenzayo zibalulekile ekwakhekeni kwesizukulu.
Okokuqala, ake sibhekisise i-LDO, i-Regulator ethobekile ephansi, noma idivaysi ephansi.I-LDO imvamisa isetshenziswa ezimweni ezidinga ukuncishiswa kwe-voltage.Izinzuzo zayo eziphambili zifaka izindleko eziphansi, umsindo ophansi kanye namanjeUkusebenza okuphezulu kwe-LDO ikakhulukazi ngenxa ye-P-Channel Mosfet esetshenziswe ngaphakathi kuyo.Njengoba i-P-Channel Mosfet iqhutshwa i-voltage iqhutshwa, ayidingi okwamanje, ngakho-ke inganciphisa kakhulu ukusetshenziswa kwamanje kwensiza uqobo.Ngaphezu kwalokho, i-voltage Drop of the P-Channel Mosfet iphansi ngenxa yokumelana kwayo okuncane, okwenza ukuthi i-voltage iwele ngaphesheya.I-LDO idinga izingxenye ezimbalwa zangaphandle, ngokuvamile i-capacitors eyodwa noma ezimbili kuphela ezidingekayo, ezinikeza izinzuzo ezibalulekile ze-LDO ekunikezelweni kwe-miniaturization kanye nokulawulwa kwezindleko.
Okulandelayo, sihlola abaguquli be-DC / DC.Ukuchazwa kwe-DC / DC Converter ukuguqulwa kwenani lamandla we-DC, okubandakanya ukukhuphula, Buck, Boost / Buck kanye nemibuthano yokungena.Uma kuqhathaniswa nama-LDOs, izinzuzo eziphambili zabaguquli be-DC / DC zisebenza kahle, amandla okukhipha ama-quieiescent amanje
.Ngokwephuculwa kwezobuchwepheshe bokuhlanganisa, abaguquli be-DC / DC banamuhla badinga kuphela inani elincane le-inductors yangaphandle kanye nama-capacitor wokuhlunga ukuze asebenze.Kodwa-ke, ububi obukhulu balolu hlobo lomlawuli wamandla bukhulu bokukhipha nokushintsha umsindo, kanye nezindleko eziphakeme.
Ngesikhathi senqubo yokukhethwa kwamadivayisi wamandla, abaqambi badinga ukwenza izinqumo ngokusekelwe ebudlelwaneni phakathi kokufaka voltage nokukhipha voltage, izindleko, ukusebenza kahle, umsindo nezinye izinkomba zokusebenza.Isibonelo, uma i-voltage yokufaka ihluke kakhulu ku-voltage ekhipha, i-LDO Regulator imvamisa iyindlela engcono ngoba ayinikezi amandla aphezulu kuphela kepha futhi ilungele ukulawulwa kwezindleko.I-LDO ilungele ikakhulukazi lezi zimo ezilandelayo: Imikhiqizo edinga umsindo ophakeme wokuhlinzekwa kwamandla nokucindezelwa okuphezulu, amadivaysi anendawo encane ye-PCBB enjengezingcingo eziphathwayo, imikhiqizo engavumeli ukusetshenziswa kwamaselula, okutholakalayo amandla adinga ngaso leso sikhathiUkulinganisa kanye nokukhishwa kwesimo sokuzihlola, imishini yezidingo ezinama-voltage drop aphansi kanye nokusetshenziswa kwamandla okuphansi, kanye nezicelo ezidinga izindleko zesifunda esiphansi nezixazululo ezilula.
Ngokuphambene nalokho, uma umehluko phakathi kwamandla kagesi wokufaka kanye ne-voltage voltage enkulu noma i-voltage Drop inkulu, i-DC / DC Converter efanelekile efanelekile.Njengoba ukufakwa kwamanje kwe-LDO kucishe kulingane nokuphuma kwamanje, uma ukwehla kwamandla kagesi kukhulu kakhulu, amandla amaningi azolahleka kwi-LDO, ngaleyo ndlela anciphise ukusebenza kahle.Kulokhu, i-DC / DC Converter iba yikhetho elingcono ngenxa yokusebenza kwalo okuphezulu kanye nokukhishwa okukhulu kwamanje, yize kungaletha ukuphazamiseka okukhulu kokuphuma, kube mancane kakhulu, kube kubi kakhulu.
Ukufingqa, lapho ukhetha idivaysi yokukhulisa ekwakhiweni kwesizungu, i-DC / DC Converter ukuphela kwendlela kuphela.Lapho ubheka amadivaysi eBuck, abaqambi badinga ukwenza ukuhlaziya okuphelele ngokwezindleko, ukusebenza kahle, umsindo, nokusebenza ukuze banqume ukuthi bakhethe i-DC / DC noma i-LDO.Idivaysi ngayinye inezinzuzo zayo ezihlukile kanye nemikhawulo, ngakho-ke abaqambi kufanele bacabangele izidingo zesekethe kanye nezimo ezithile zohlelo lokusebenza lapho benquma ukuthi yiluphi uhlelo olufanele uhlelo oluthile.