Yakakura Package MOSFET Driver Circuit

Chekutanga, mhando nechimiro cheMOSFET, MOSFET iFET (rimwe iJFET), inogona kugadzirwa kuita yakawedzera kana kupera mhando, P-channel kana N-channel inokwana marudzi mana, asi iko iko kushandiswa kweN -Channel MOSFETs uye yakakwidziridzwa P-channel MOSFETs, saka inowanzonzi NMOSFET, kana PMOSFET inoreva So anowanzo kutaurwa NMOSFET, kana PMOSFET inoreva izvi zviviri. marudzi. Kune aya marudzi maviri eMOSFET akakwenenzverwa, maNMOSFET anonyanya kushandiswa nekuda kwekudzikira-kupikisa uye nyore kugadzira. Naizvozvo, maNMOSFET anowanzo shandiswa mukuchinja magetsi uye mota dhiraivha application, uye sumo inotevera inotarisawo paNMOSFETs. parasitic capacitance iripo pakati pemapini matatu eMOSFET, iyo isingadiwi, asi nekuda kwekukanganisa kwekugadzirwa kwekugadzira. Kuvapo kweparasitic capacitance kunoita kuti zvinyanye kupenga kugadzira kana kusarudza mutyairi wedunhu. Pane diode yeparasitic pakati pedhiraini nekwakabva. Izvi zvinonzi body diode uye zvakakosha pakutyaira inductive mitoro yakadai semotor. Nenzira, diode yemuviri inongowanikwa muMOSFET yega uye kazhinji haipo mukati meIC chip.

Iye zvinoMOSFETdhiraivha yakaderera-voltage application, kana kushandiswa kwe5V magetsi emagetsi, panguva ino kana iwe ukashandisa yechinyakare totem pole chimiro, nekuda kweiyo transistor ive inenge 0.7V kudonha kwemagetsi, zvichikonzera iyo yekupedzisira chaiyo yakawedzerwa kugedhi pane voltage chete. 4.3 V. Panguva ino, tinosarudza zita regedhi voltage ye4.5V yeMOSFET pane kuvapo kweimwe njodzi. Dambudziko rimwe chetero rinoitika mukushandiswa kwe3V kana mamwe mashoma-voltage magetsi ekupa nguva. Dual voltage inoshandiswa mune mamwe maseketi ekudzora uko chikamu chepfungwa chinoshandisa yakajairwa 5V kana 3.3V dhijitari voltage uye chikamu chemagetsi chinoshandisa 12V kana kutokwira. Iwo ma voltages maviri akabatana achishandisa common ground. Izvi zvinoisa chinodikanwa chekushandisa dunhu rinobvumira iyo yakaderera voltage divi kuti inyatso kudzora MOSFET padivi revoltage yakakwira, nepo MOSFET iri padivi revoltage yakatarisana nematambudziko akafanana akataurwa mu1 ne2.

Muzviitiko zvese zvitatu, iyo totem pole chimiro haigone kuzadzisa zvinodiwa zvinobuda, uye mazhinji ari kure-pasherufu MOSFET mutyairi ICs anoita kunge anosanganisira gedhi voltage inodzikamisa chimiro. Iyo yekupinza voltage haisi iyo yakatarwa kukosha, inosiyana nenguva kana zvimwe zvinhu. Musiyano uyu unokonzeresa kuti dhiraivha yakapihwa kuMOSFET nePWM dunhu ive isina kugadzikana. Kuti iite kuti MOSFET ive yakachengeteka kubva kune yakakwira gedhi voltages, mazhinji maMOSFET ane akavakirwa-mukati mavoltage regulators kuti adzikise zvine simba kukwirisa kwegedhi voltage. Muchiitiko ichi, kana dhiraivha yakapihwa yakawanda kupfuura yemagetsi regulator, inokonzeresa mashandisiro emagetsi akakura panguva imwe chete, kana ukangoshandisa musimboti weresistor voltage divider kudzikisa gedhi voltage, pachave neyakakwirisa. input voltage, theMOSFETinoshanda nemazvo, nepo voltage yekupinda ichideredzwa kana gedhi regedhi risingakwane kukonzeresa kushoma kuzere, nekudaro kuwedzera simba rekushandisa.

Sezvinei zvakajairika dunhu pano chete kune NMOSFET mutyairi wedunhu kuita ongororo yakapusa: Vl neVh ndiyo yakaderera-yekupedzisira uye yepamusoro-yekupedzisira magetsi, iwo maviri voltages anogona kufanana, asi Vl haifanire kudarika Vh. Q1 uye Q2 inoumba inverted totem pole, inoshandiswa kuona yekuzviparadzanisa nevamwe, uye panguva imwe chete kuona kuti maviri mutyairi chubhu Q3 neQ4 haizove yakafanana panguva yekuitisa. R2 neR3 inopa PWM voltage R2 uye R3 inopa iyo PWM voltage referensi, nekushandura iyi referensi, unogona kurega basa redunhu muPWM chiratidzo chewaveform rine kukwira uye yakatwasuka chinzvimbo. Q3 neQ4 dzinoshandiswa kupa dhiraivha iripo, nekuda kweiyo-nguva, Q3 neQ4 inoenderana neVh neGND ingori shoma yekudonha kweVce voltage, iyi kudonha kwemagetsi kunowanzo kungoita 0.3V kana zvakadaro, kuderera zvakanyanya. kupfuura 0.7V Vce R5 uye R6 ndiwo anopikisa mhinduro, anoshandiswa kugedhi R5 neR6 ndiwo anopikisa mhinduro anoshandiswa kuenzanisa gedhi remagetsi, rinozopfuura nepaQ5 kuburitsa mhinduro yakasimba isina kunaka pazvigadziko zve. Q1 uye Q2, nokudaro kudzikamisa gedhi voltage kune inogumira kukosha. Kukosha uku kunogona kugadziriswa neR5 neR6. Chekupedzisira, R1 inopa kudzikiswa kweiyo base ikozvino kuQ3 neQ4, uye R4 inopa muganhu wegedhi razvino kune maMOSFETs, kunova kumisa Ice yeQ3Q4. Iyo acceleration capacitor inogona kubatanidzwa mukufanana pamusoro peR4 kana zvichidikanwa.