MOSFET mudziyo kusarudzwa kuti utarise ese maficha ezvinhu, kubva padiki kusarudza N-mhando kana P-mhando, pasuru mhando, hombe kune MOSFET voltage, pa-resistance, nezvimwe, zvakasiyana-siyana zvekushandisa zvinosiyana.Chinyorwa chinotevera chinopfupikisa kusarudzwa kweMOSFET yemitemo mikuru mitatu, ndinotenda kuti mushure mekuverenga iwe uchava nezvakawanda.
1. Simba MOSFET kusarudzwa danho rokutanga: P-chubhu, kana N-chubhu?
Kune marudzi maviri emagetsi MOSFETs: N-channel uye P-channel, mukuita dhizaini yekusarudza iyo N-tube kana P-tube, kune chaiyo application yakasarudzika yekusarudza, N-channel MOSFETs kusarudza modhi, mutengo wakaderera;P-channel MOSFETs kusarudza modhi shoma, mutengo wakakwira.
Kana iyo voltage paS-pole yekubatanidza kwesimba MOSFET isiri iyo yekutarisa pasi sisitimu, iyo N-channel inoda inoyangarara pasi magetsi ekupa dhiraivha, transformer drive kana bootstrap drive, drive circuit complex;P-channel inogona kufambiswa zvakananga, kutyaira nyore.
Kuda kufunga nezveN-chiteshi uye P-chaneru zvikumbiro zvinonyanya
a.Notebook makomputa, desktops uye maseva anoshandiswa kupa iyo CPU uye system kutonhora fan, printer feeding system mota drive, vacuum cleaners, air purifiers, mafeni emagetsi uye zvimwe midziyo yemumba inodzora mota, masisitimu aya anoshandisa yakazara-bhiriji redunhu chimiro, ruoko rwebhiriji rimwe nerimwe. pachubhu inogona kushandisa P-chubhu, inogona zvakare kushandisa N-chubhu.
b.Kukurukurirana system 48V yekuisa sisitimu yekupisa-plug MOSFET yakaiswa pakakwirira, unogona kushandisa P-tubes, unogona zvakare kushandisa N-tubes.
c.Notebook komputa yekuisa reketi munhevedzano, tamba basa rei-anti-reverse yekubatanidza uye kushandura-kure-kumashure simba MOSFETs, kushandiswa kweN-channel kunoda kudzora chip yemukati yakasanganiswa drive yekuchaja pombi, kushandiswa kweP-channel. inogona kufambiswa zvakananga.
2. Kusarudzwa kwemhando yepakiti
Simba MOSFET chiteshi chemhando yekuona nhanho yechipiri yekuona pasuru, mapakeji ekusarudza misimboti.
a.Kukwira kwekushisa uye dhizaini yekupisa ndiyo inonyanya kukosha zvinodiwa pakusarudza pasuru
Yakasiyana mapakeji saizi ane akasiyana ekupisa kwekupisa uye kupera simba, mukuwedzera pakufunga mamiriro ekupisa eiyo system uye ambient tembiricha, senge paine kutonhora kwemhepo, kupisa singi chimiro uye saizi zvirambidzo, ingave nharaunda yakavharwa uye zvimwe zvinhu, musimboti wakakosha ndeyekuona kukwira kwekushisa kwesimba reMOSFET uye kushanda zvakanaka kwehurongwa, misimboti yekusarudza maparamendi uye kurongedza mamwe masimba akajairika MOSFET.
Dzimwe nguva nekuda kwemamwe mamiriro, kudiwa kwekushandisa akawanda maMOSFET akafanana kugadzirisa dambudziko rekupisa kupisa, senge muPFC application, magetsi emagetsi mota controller, masisitimu ekutaurirana, senge module magetsi emagetsi echipiri synchronous rectification application, anosarudzwa mukati. parallel nemachubhu akawanda.
Kana yakawanda-tube parallel yekubatanidza isingagone kushandiswa, mukuwedzera pakusarudza simba MOSFET nekuita zvirinani, mukuwedzera, hombe saizi package kana rudzi rutsva rwepakeji inogona kushandiswa, semuenzaniso, mune mamwe AC/DC magetsi TO220. chinjirwa ku TO247 package;mune imwe nzira yekutaurirana magetsi emagetsi, iyo itsva DFN8 * 8 package inoshandiswa.
b.Size kuganhurira sisitimu
Mamwe masisitimu emagetsi anoganhurirwa nehukuru hwePCB uye kureba kwemukati, senge module magetsi emagetsi ekutaurirana masisitimu nekuda kwekukwirira kwezvirambidzo zvinowanzo shandisa DFN5 * 6, DFN3 * 3 package;mune imwe ACDC magetsi ekupa, kushandiswa kweyekupedzisira-yakaonda dhizaini kana nekuda kwekugumira kwegoko, musangano TO220 pasuru simba MOSFET mapini akananga mumudzi, kureba kwezvirambidzo hakugone kushandisa TO247 package.
Imwe yekupedzisira-yakaonda dhizaini yakananga kubhenda pini yemudziyo flat, iyi dhizaini yekugadzira inozoita yakaoma.
Mukugadzirwa kweyakakura-inokwana lithium bhatiri yekudzivirira bhodhi, nekuda kweakaomesesa saizi zvirambidzo, vazhinji zvino vanoshandisa chip-level CSP package kuvandudza mashandiro emafuta zvakanyanya sezvinobvira, uku uchisimbisa hukuru diki.
c.Kudzora mutengo
Pakutanga akawanda emagetsi masisitimu anoshandisa plug-in package, makore ano nekuda kwekuwedzera kwemitengo yevashandi, makambani mazhinji akatanga kuchinjika kuSMD package, kunyangwe mutengo weWelding weSMD pane plug-in yakakwirira, asi iyo yakakwira degree re automation yeSMD welding, iyo mutengo wakazara unogona kuramba uchidzorwa mune inonzwisisika siyana.Mune mamwe maapplication akadai sedesktop motherboards uye mabhodhi ayo anonyanya kudhura, iwo simba MOSFETs mumapakeji eDPAK anowanzo shandiswa nekuda kwemutengo wakaderera wepakeji iyi.
Naizvozvo, mukusarudza kwesimba MOSFET package, kusanganisa yavo yekambani maitiro uye zvigadzirwa zvechigadzirwa, uchifunga nezvezviri pamusoro apa.
3. Sarudza pa-state resistance RDSON, cherechedza: kwete ikozvino
Nguva zhinji mainjiniya ane hany'a neRDSON, nekuti RDSON uye kurasikirwa kwekuita kune hukama hwakananga, idiki iyo RDSON, idiki simba reMOSFET conduction kurasikirwa, kukwira kwakanyanya, kuderera kwekushisa kukwira.
Saizvozvo, mainjiniya kusvika pazvinobvira kutevera purojekiti yapfuura kana izvo zviripo muraibhurari yezvinhu, yeRDSON yemhando yekusarudza chaiyo haina zvakawanda zvekufunga.Kana tembiricha yakwira yesimba rakasarudzwa MOSFET yakanyanya kuderera, nekuda kwezvikonzero zvemutengo, ichachinja kune RDSON yakakura zvikamu;kana tembiricha yakwira yesimba MOSFET yakanyanya, kushanda kwehurongwa kwakadzikira, kunochinja kuRDSON zvidiki zvikamu, kana nekugadzirisa ekunze dhiraivha wedunhu, kugadzirisa nzira yekugadzirisa kupisa kupisa, nezvimwe.
Kana iri purojekiti nyowani, hapana purojekiti yapfuura yekutevera, zvino ungasarudza sei simba reMOSFET RDSON?Heino nzira yekukuzivisa iwe: nzira yekuparadzira mashandisirwo emagetsi.
Paunenge uchigadzira dhizaini yemagetsi, iyo inozivikanwa mamiriro ndeiyi: yekupinda voltage renji, yakabuda voltage / inobuda ikozvino, kunyatsoita, kushanda frequency, drive voltage, hongu, kune zvimwe zviratidzo zvehunyanzvi uye simba MOSFETs ane hukama zvakanyanya kune aya ma paramita.Matanho ndeaya.
a.Zvinoenderana neiyo yekuisa voltage renji, yakabuda voltage / yakabuda ikozvino, kunyatsoita, kuverenga kurasikirwa kwakanyanya kweiyo system.
b.Simba redunhu rakarasika rakarasika, risiri-simba redunhu rinorasikirwa nekurasikirwa, IC static kurasikirwa uye kurasikirwa kwekutyaira, kuita fungidziro yakaoma, kukosha kweempirical kunogona kuverengera 10% kusvika 15% yekurasikirwa kwakazara.
Kana dunhu remagetsi riine ikozvino sampling resistor, verenga mashandisirwo emagetsi ezvino sampling resistor.Kurasikirwa kwakazara kubvisa kurasikirwa uku pamusoro, chikamu chasara ndicho chishandiso chemagetsi, transformer kana inductor simba kurasikirwa.
Iyo yasara kurasikirwa kwesimba ichagoverwa kune simba mudziyo uye transformer kana inductor mune imwe chikamu, uye kana iwe usina chokwadi, avhareji yekugovera nehuwandu hwezvikamu, kuitira kuti iwe uwane kurasikirwa kwesimba kweMOSFET yega yega.
c.Iko kurasikirwa kwesimba kweMOSFET kwakagoverwa kune kurasikirwa kwekuchinja uye kurasikirwa kwekuita mune imwe chikamu, uye kana zvisina chokwadi, kurasikirwa kwekuchinja uye kurasikirwa kwekuita kunogoverwa zvakaenzana.
d.Nekurasikirwa kwekuita kweMOSFET uye iyo RMS ikozvino inoyerera, kuverenga iyo yakanyanya kubvumidzwa conduction kuramba, kuramba uku ndiko MOSFET pahupamhi hwekushanda junction tembiricha RDSON.
Pepa re data riri musimba MOSFET RDSON yakanyorwa neyakatsanangurwa mamiriro ebvunzo, mune akasiyana akatsanangurwa mamiriro ane hunhu hwakasiyana, tembiricha yekuyedza: TJ = 25 ℃, RDSON ine yakanaka tembiricha coefficient, saka zvinoenderana nepamusoro pekushanda junction tembiricha yeMOSFET uye RDSON tembiricha coefficient, kubva pairi pamusoro RDSON yakaverengerwa kukosha, kuti uwane inoenderana RDSON pa25 ℃ tembiricha.
e.RDSON kubva pa25 ℃ kusarudza rudzi rwakakodzera rwesimba MOSFET, zvinoenderana nemaparamita chaiwo eMOSFET RDSON, pasi kana kumusoro trim.
Kuburikidza nematanho ari pamusoro, kusarudzwa kwekutanga kwesimba MOSFET modhi uye RDSON paramita.
Ichi chinyorwa chakatorwa kubva kunetiweki, ndapota taura nesu kuti tibvise kukanganisa, ndatenda!
Zhejiang NeoDen Technology Co., Ltd. yave kugadzira nekutumira kunze michina midiki yakasiyana-siyana yekunhonga nenzvimbo kubva muna 2010. Tichitora mukana weR&D yedu yakapfuma ine ruzivo, kugadzirwa kwakanyatsodzidziswa, NeoDen inohwina mukurumbira mukuru kubva kuvatengi vepasi rose.
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