Ibisabwa byumushoferi wa MOSFET

Igihe cyo kohereza: Nyakanga-24-2024

Hamwe nabashoferi ba MOS uyumunsi, haribisabwa byinshi bidasanzwe:

1. Porogaramu ntoya ya voltage

Iyo porogaramu ya 5V ihindukaamashanyarazi, muri iki gihe niba gukoresha imiterere ya totem pole gakondo, kubera ko triode iba 0.7V gusa hejuru no kumanuka, bikavamo irembo ryanyuma ryumutwaro kuri voltage ni 4.3V gusa, muriki gihe, gukoresha ikoreshwa ryamashanyarazi yemewe ya 4.5VMOSFETS hari urwego runaka rwibyago.Ibintu bimwe bibaho kandi mugukoresha 3V cyangwa izindi voltage nkeya yo guhinduranya amashanyarazi.

2. Porogaramu nini ya voltage

Urufunguzo rwa voltage ntirufite agaciro k'umubare, ruratandukana mugihe cyangwa kubera izindi mpamvu. Ihindagurika ritera voltage ya disiki yahawe MOSFET numuzunguruko wa PWM idahindagurika.

Kugirango turusheho kurinda MOSFET kumashanyarazi maremare, MOSFETs nyinshi zashyizemo ingufu za voltage kugirango zihatire imipaka kubunini bwa voltage yumuryango. Muri iki kibazo, iyo disiki ya voltage yazanwe kugirango irenze voltage yubuyobozi, igihombo kinini cyimikorere ihagaze.

Muri icyo gihe, niba ihame shingiro ryumubyigano wa voltage ukoreshwa mukugabanya voltage yumuryango, bizashoboka ko niba voltage urufunguzo ruri hejuru, MOSFET ikora neza, kandi niba voltage yurufunguzo yagabanutse, voltage yumuryango ntabwo bihagije, bivamo kuzimya no kuzimya bidahagije, bizamura igihombo cyimikorere.

MOSFET yo gukingira birenze urugero kugirango wirinde impanuka zumuriro (1)

3. Porogaramu ebyiri za voltage

Mubice bimwe byo kugenzura, igice cya logique cyumuzunguruko gikoresha amashanyarazi asanzwe ya 5V cyangwa 3.3V, mugihe igice gisohoka ingufu zikoreshwa 12V cyangwa zirenga, kandi voltage zombi zahujwe nubutaka rusange.

Ibi birerekana neza ko umuyagankuba utanga amashanyarazi ugomba gukoreshwa kugirango uruhande ruke rwa voltage rushobore gukoresha mu buryo bushyize mu gaciro amashanyarazi MOSFET, mugihe umuyaga mwinshi MOSFET uzashobora guhangana ningorane zimwe zavuzwe muri 1 na 2.

Muri ibi bihe bitatu, ubwubatsi bwa totem pole ntibushobora kuba bujuje ibyasohotse, kandi ICs nyinshi za MOS zitwara ibinyabiziga ntizisa nkizishyiramo ingufu za voltage zigabanya kubaka.