Nongedzo dzekushandisa 3.3V kuburitsa muAMS1117 uye LM1117 dzakateedzana uye nemutengo wakaderera zvimwe zvigadzirwa

Inoenderana pdf uye ruzivo

tsananguro yechigadzirwa

AMS1117-3.3 uye LM1117MPX-3.3 ari matatu-terminal kuburitsa yakaderera kudonhedza mutsara mitsara ine yakabuda ikozvino ye1A. Nekuda kwekuita kwayo kwakanyanya, inoshandiswa zvakanyanya.

chinhu chikuru

Iko kudonha kwemagetsi kuri 1.2V chete pa1A kuburitsa ikozvino, iine zvazvino kugadzirisa basa, kupisa basa rekudzivirira, uye kuburitsa voltage kunyatso kusvika 1.5%.

Maitiro Ekushandisa

Sezvo iro rakanyanya kuisa magetsi risingakwanise kudarika 18V, ndinoedza kuichengeta pazasi pe14V kana ndichishandisa bhatiri simba. Kana tikabatanidza iyo nekumucheto kwekupedzisira kweshanduro yemagetsi, inowanzo kurudzirwa kuti iyo yekuburitsa voltage yesimba rekuchinja magetsi inodzorwa panenge gumi nemaviri. Iyi inotevera ndiyo yakajairwa dhayagiramu yedhaimendi.Ivo ma capacitor kumacheto maviri emufananidzo haakurudzirwe kusiiwa. Munyori akaita bvunzo, mune yakagadzikana kwazvo DC yekuisa nharaunda, iyo capacitor kumagumo ekupinza inogona kusiiwa, asi zvinokurudzirwa kuichengetera kune kudzikama kwese. Uye zvakare, iyo capacitance kukosha kweiyo capacitor inogona kugadziriswa zvinoenderana neicho chaicho chekushandisa chiitiko, asi haigone kudzika kupfuura 10μF.

Dambudziko rakakosha

Kana ukabatanidzwa kumucheto kumashure kweimwe switching magetsi, dzimwe nguva basa rinenge risina kugadzikana. Kana pasina kukanganisa mukutenderera kwesimba remagetsi rinoshanduka pacharo kumberi kwekupedzisira, saka tinofanirwa kuisa kupokana kungangoita 20Ω pakati pekuguma kwesimba rekuchinja magetsi neinogumira AMS1117-3.3. Mushure mekubatanidzwa, dunhu rese rinogona kushanda zvakajairika.

Yakaderera-mutengo imwe nzira

Sezvo ichi chigadzirwa chichishandiswa muhukuru kwazvo muChina, maChinese mabhurani akagadzirawo zvigadzirwa zvine iwo iwo ma parameter uye kurongedza. Nekuti kugadzira kweChinese kune zvakwakanakira mutengo, mutengo weChinese zvigadzirwa zvigadzirwa wakaderera zvakanyanya. Mutengo sezuva rekunyora kwechinyorwa chino, LM1117MPX-3.3NOPB1000Pcs, iri $ 0.15624 pa www.digikey.com uye $ 0.468 pa www.mouser.com. Mutengo weChinese brand ndeye $ 0.08. Kana iwe uchida kuziva zvakawanda nezve zvimwe zvigadzirwa mune imwecheteyo akateedzana, ndapota nyorera favkb@outlook.com.