MOSFET Bukatun Da'irar Direba

Tare da direbobin MOS na yau, akwai buƙatu masu ban mamaki da yawa:

1. Low ƙarfin lantarki aikace-aikace

Lokacin da aikace-aikace na 5V sauyawatushen wutan lantarki, A wannan lokaci idan amfani da gargajiya totem iyakacin duniya tsarin, saboda triode zama kawai 0.7V sama da kasa hasara, sakamakon wani takamaiman karshe load kofa a kan irin ƙarfin lantarki ne kawai 4.3V, a wannan lokaci, da yin amfani da ƙãra ƙõfa irin ƙarfin lantarki. ku 4.5vMOSFETs akwai wani mataki na haɗari.Haka lamarin yake Hakanan yana faruwa a aikace-aikacen 3V ko wasu ƙarancin wutar lantarki mai sauyawa.

2.Wide ƙarfin lantarki aikace-aikace

Ƙarfin maɓalli ba shi da ƙimar ƙima, yana bambanta lokaci zuwa lokaci ko kuma saboda wasu dalilai. Wannan bambancin yana haifar da wutar lantarki da aka baiwa MOSFET ta da'irar PWM ya zama mara ƙarfi.

Domin tabbatar da mafi kyawun MOSFET a manyan ƙarfin kofa, MOSFET da yawa sun shigar da masu kula da wutar lantarki don tilasta iyaka akan girman ƙarfin ƙarfin ƙofar. A wannan yanayin, lokacin da aka kawo wutar lantarki ya wuce ƙarfin mai sarrafawa, ana haifar da asarar babban aiki a tsaye.

Haka kuma, idan aka yi amfani da ainihin ka'idar resistor voltage divider don rage wutar lantarki ta ƙofar, zai faru cewa idan maɓalli na wuta ya fi girma, MOSFET yana aiki da kyau, kuma idan an rage ƙarfin wutar lantarki, ƙarfin ƙofar ba zai zama ba. isa, yana haifar da rashin isasshen kunnawa da kashewa, wanda zai haɓaka asarar aiki.

MOSFET da'irar kariya ta wuce gona da iri don guje wa haɗari na ƙona wutar lantarki (1)

3. Dual ƙarfin lantarki aikace-aikace

A wasu da'irori masu sarrafawa, ɓangaren tunani na kewaye yana amfani da irin ƙarfin lantarki na 5V ko 3.3V na bayanai, yayin da ɓangaren wutar lantarki ya shafi 12V ko fiye, kuma ƙarfin wutar lantarki guda biyu suna da alaƙa da ƙasa gama gari.

Wannan ya bayyana a sarari cewa dole ne a yi amfani da da'irar samar da wutar lantarki ta yadda ƙananan wutar lantarki za su iya sarrafa MOSFET mai girma, yayin da babban ƙarfin wutar lantarki MOSFET zai iya jure wa matsalolin da aka ambata a cikin 1 da 2.

A cikin waɗannan lokuta guda uku, ginin katako na totem ba zai iya cika buƙatun fitarwa ba, kuma yawancin direbobin MOS IC ba sa kama da haɗaɗɗen ƙarfin wutar lantarki na ƙofar ginin.