MOSFET Driver Circuit Requirements

Zofunikira za MOSFET Driver Circuit

Nthawi Yotumiza: Jul-24-2024

Ndi madalaivala a MOS amakono, pali zofunika zingapo zodabwitsa:

1. Kugwiritsa ntchito magetsi otsika

Pamene ntchito 5V kusinthamagetsi, pa nthawi ino ngati ntchito chikhalidwe totem mzati dongosolo, chifukwa atatu okha 0,7V mmwamba ndi pansi imfa, chifukwa cha yeniyeni chomaliza katundu chipata pa voteji ndi 4.3V yekha, pa nthawi iyi, ntchito kololeka chipata voteji. ku 4.5vZithunzi za MOSFET pali mlingo wina wa chiopsezo.Mkhalidwe womwewo zimachitikanso ntchito 3V kapena otsika-voteji kusintha magetsi.

2.Wide voltage ntchito

Mphamvu yamagetsi ya keying ilibe nambala, imasiyana nthawi ndi nthawi kapena chifukwa cha zinthu zina. Kusiyanasiyana kumeneku kumapangitsa kuti magetsi oyendetsa operekedwa ku MOSFET ndi dera la PWM akhale osakhazikika.

Kuti ateteze bwino MOSFET pamagetsi apamwamba, ma MOSFET ambiri ayika zowongolera magetsi kuti azikakamiza kuchepetsa kukula kwa magetsi a pachipata. Pamenepa, pamene magetsi oyendetsa galimoto akubweretsedwa kuti apitirire voteji ya regulator, kutaya kwakukulu kwa ntchito kumayamba.

Panthawi imodzimodziyo, ngati mfundo yaikulu ya resistor voltage divider ikugwiritsidwa ntchito kuchepetsa mphamvu yamagetsi, zidzachitika kuti ngati magetsi a keyed ali apamwamba, MOSFET imagwira ntchito bwino, ndipo ngati magetsi akuchepetsedwa, magetsi a chipata sichitha. zokwanira, zomwe zimabweretsa kusakwanira kuyatsa ndi kuzimitsa, zomwe zimathandizira kuwonongeka kwa magwiridwe antchito.

MOSFET overcurrent chitetezo dera kupewa ngozi magetsi kuwotcha(1)

3. Ntchito ziwiri zamagetsi

M'mabwalo ena owongolera, gawo laling'ono la dera limagwiritsa ntchito voteji ya data ya 5V kapena 3.3V, pomwe gawo lamagetsi limagwira ntchito 12V kapena kupitilira apo, ndipo ma voliyumu awiriwa amalumikizidwa ndi zomwe wamba.

Izi zikuwonekeratu kuti dera loperekera magetsi liyenera kugwiritsidwa ntchito kuti mbali yotsika yamagetsi izitha kuyendetsa bwino mphamvu yamagetsi ya MOSFET, pomwe ma voltage okwera a MOSFET azitha kuthana ndi zovuta zomwe zatchulidwa mu 1 ndi 2.

Pazochitika zitatuzi, zomangamanga za totem pole sizingakwaniritse zofunikira, ndipo ma driver ambiri a MOS omwe alipo tsopano sakuwoneka kuti akuphatikiza zomanga zipata.