Sharuɗɗa don amfani da fitarwa 3.3V a cikin jerin AMS1117 da LM1117 da samfuran zaɓi masu arha mai sauƙi

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samfurin samfurin

AMS1117-3.3 da LM1117MPX-3.3 su ne masu fitar da layi uku masu ƙarancin ƙarfi tare da ƙarancin 1A. Saboda kyakkyawan aikinsa, ana amfani dashi ko'ina.

babban fasali

Rashin ƙarfin lantarki kawai 1.2V ne a halin yanzu na fitarwa na 1A, tare da iyakancewar aiki na yanzu, aikin kariyar zafi fiye da ƙima, da daidaitaccen ƙarfin ƙarfin fitarwa har zuwa 1.5%.

Jagororin amfani

Tunda iyakar ƙarfin ƙarfin shigarwar sa ba zai iya wuce 18V ba, Ina ƙoƙarin kiyaye shi ƙasa da 14V lokacin amfani da ƙarfin baturi. Idan muka haɗa shi zuwa ƙarshen ƙarshen samar da wutar lantarki mai sauyawa, yawanci ana ba da shawarar cewa ƙarfin ƙarfin fitarwa na wutar lantarki mai sauyawa ya kasance mai sarrafawa a kusan 12V. Mai zuwa shine zanen da'irar aikace-aikacen da yafi dacewa Ba'a ba da shawarar ƙetare masu amfani da wutar lantarki a ƙarshen hoton ba. Marubucin ya yi gwaji, a cikin yanayin daidaitaccen yanayin shigar da DC, ana iya ƙin ƙarfin ƙarfin shigarwar ƙarshen, amma ana ba da shawarar a kiyaye shi don cikakken kwanciyar hankali. Additionari akan haka, ana iya daidaita darajar kapastozuwa gwargwadon yanayin yanayin amfani, amma ba zai iya zama kasa da 10μF ba.

Matsala ta musamman

Lokacin da aka haɗa zuwa ƙarshen ƙarshen wasu sauyawar wutar lantarki, lokaci-lokaci aikin zai zama mara ƙarfi. Idan babu kuskure a cikin da'irar sauyawar wutan lantarki kanta a karshen gaba, to ya kamata mu sanya juriya na kusan 20Ω tsakanin ƙarshen fitowar wutar lantarki mai sauyawa da ƙarshen shigarwar AMS1117-3.3. Bayan an haɗa shi, dukkanin kewayen na iya yin aiki daidai.

-Aramar tsada

Saboda ana amfani da wannan samfurin a cikin Sin yana da girma ƙwarai, don haka alamun China suma sun haɓaka samfura tare da sigogi iri ɗaya da marufi. Saboda masana'antun kasar Sin suna da fa'idodi da yawa na tsada, farashin samfuran samfuran China sun fi ƙasa. Farashin daga ranar rubuta wannan labarin, LM1117MPX-3.3NOPB1000Pcs, $ 0.15624 ne a www.digikey.com da $ 0.468 a www.mouser.com. Farashin alamar kasar Sin shine $ 0.08. Idan kuna buƙatar ƙarin sani game da wasu samfuran a cikin wannan jerin, tuntuɓi favkb@outlook.com.