El schottky diode ndeimwe yei Zvemagetsi zvigadzirwa inonyanya kunakidza yemapurojekiti emagetsi. Iyo yakasarudzika mhando ye diode ine zvimwe zvinhu zvinoita kuti ive yakasarudzika uye inoshanda kune mamwe maapplication. Tichifunga nezvekumhanya kwayo kukuru kwekuchinja, inoshandiswawo zvakanyanya muTTL logic ICs.
Muchirongwa ichi ucha kuziva kuti chii iyo Schottky diode, akaigadzira, zvimiro zvayo, maapplication, kwaunogona kuitenga, nezvimwe.
Chii chinonzi diode?
Un semiconductor diode Icho chikamu chemagetsi chine 2 terminals inobvumira kutenderera kwemagetsi emagetsi kuburikidza nayo, asi chete mune imwe nzira, ichivhara nzira kune imwe. Izvi zvivakwa zvinoita kuti zvive zvakakosha kune akasiyana maapplication, akadai semagetsi emagetsi. Inogonawo kushandiswa kudzora.
Pane marudzi akasiyana-siyana e diode, sekuti:
- Avalanche diode kana TVS, iyo inoitisa yakatarisana kana reverse voltage inodarika voltage yekuputsa.
- LED diode, inokwanisa kubudisa chiedza chemavara akasiyana zvichienderana nekuumbwa. Izvi zvinoitika kana vatakuri vechaja vakapfuura pajunction uye vanoburitsa mafotoni.
- tunnel effect diode kana Esaki, iyo inobvumira kukwidziridza masaini uye kushanda nekumhanya kwakanyanya. Iwo anogona kushandiswa munzvimbo dzine tembiricha yakadzikira, yakakwirira magineti, uye nemwaranzi yakakwira nekuda kwekukwira kwechaji.
- Gunn diode, zvakafanana neaya emugero uye izvo zvinoburitsa kushomeka kwakashata.
- laser diode, yakafanana ne LED, asi inogona kuburitsa laser danda.
- thermal diode, inogona kushanda se sensor yekushisa, sezvo zvichienderana nayo, magetsi anosiyana.
- Photodiode, yakabatanidzwa kune optical charge carriers, ndiko kuti, inonzwisisa kuchiedza. Iwo anogona zvakare kushandiswa semwenje sensors.
- PIN diode, yakafanana neyakajairika junction, asi ine chikamu chepakati chisina dopant. Ndiko kuti, intrinsic layer pakati peP neN. Izvo zvinoshandiswa se-high-frequency switches, attenuators, kana ionizing radiation detectors.
- Schottky diode, diode iyi ndiyo inotifarira pachinyorwa ichi, inobata simbi diode ine yakaderera kuputsa voltage pane PN.
- stabistor kana kumberi referensi diode, inokwanisa kuve yakagadzikana zvakanyanya mumhepo yekumberi.
- varicap, diode inoshanduka capacitance.
Chii chinonzi Schottky diode?
El Schottky diode yakatumidzwa zita remuGerman physicist Walter Hermann Schottky., sezvo ichigadzira Schottky barriers (metal-semiconductor kana MS junction) panzvimbo yekushandisa yakajairika semiconductor junction. Nechikonzero ichocho, mune dzimwe nzvimbo iwe unoiwana pasi pezita rekuti Schottky barriers diode kana pamusoro barriers diode.
Kutenda kumubatanidzwa iwoyo, diode iyi ine a yakaderera mberi voltage inodonha pane PN diode, uye inogona kushandiswa muredhiyo frequency (RF) uye yakakwirira-kumhanya switching application. Zvakare, mumwe musiyano nesilicon PN junction diode ndeyekuti ine yakajairika yekumberi voltage ye0.6 kusvika 0.75V, nepo Schottky imwe iri 0.15 kusvika 0.45V. Iko kudiwa kwakaderera kwevoltage ndiko kunoita kuti vachinje nekukurumidza.
Kudzokera kumusoro we iyo MS union, iyo simbi inowanzoita tungsten, chromium, platinum, molybdenum, mamwe silicides (akawanda kwazvo nekuti akachipa, akawanda uye ane yakanaka conductivity), kana zvakare goridhe, nepo semiconductor kazhinji N-mhando doped silicon, kunyangwe painewo mamwe. inobatanidza semiconductors. Rutivi rwesimbi ndiyo anode, nepo semiconductor divi rinoenderana necathode.
Iyo Schottky diode inoshaya depletion layer, uye inorongedzerwa seunipolar semiconductor mudziyo, pane bipolar sePNs. Zvakare, iyo yazvino ichave mhedzisiro yevazhinji vatakuri (maerekitironi) vachikukurwa nepakati pe diode, uye sezvo pasina P-zone, hapana vashoma vatakuri (maburi), uye kana reverse yakarerekera, iyo diode inoitisa ichamira kanenge pakarepo. throttling kuyerera kwezvino.
Schottky diode kushanda
Kana ari Schottky diode kushanda, inogona kuita nenzira dzinoverengeka zvichienderana nepolarization:
- kwete polarized: Pasina kurerekera, iyo MS junction (kuve iyo N-mhando semiconductor), maerekitironi bhendi rekufambisa kana maerekitironi akasununguka anosimuka kubva pane semiconductor kuenda kusimbi kuti agadzirise mamiriro ekuenzanisa. Sezvaunoziva, kana atomu isina kwayakarerekera ikawana erekitironi inova iyoni isina kunaka, uye kana yarasika inova iyoni yakanaka. Izvo zvinozoita kuti maatomu esimbi ave maion asina kunaka uye ayo ari kudivi resemiconductor kuita zvakanaka, achiita sematunhu ekuderera. Sezvo simbi ine maerekitironi akawanda emahara, hupamhi hunofamba maerekitironi hahuna maturo kana uchienzaniswa nehupamhi mukati menzvimbo yerudzi rweN. Izvi zvinoguma nekugona kuvakwa (voltage) kunyanya muN-zone. voltage chaizova chipingamupinyi chakasangana maerekitironi ari semiconductor ari conduction bhendi pakuedza kupfuura kudivi simbi (shoma nhamba maerekitironi kuyerera kubva S kusvika M). Kuti ukunde chipingamupinyi ichi, maerekitironi emahara anoda simba rakakura kudarika rakavakirwa mukati kana kuti hapazove nezvino.
- Tungamira polarization: Kana iyo yakanaka terminal yemagetsi sosi yakabatana nesimbi terminal (anode) uye iyo yakaipa terminal kune N-mhando semiconductor (cathode), iyo Schottky diode inorerekera mberi. Izvo zvinogadzira huwandu hukuru hwemahara maerekitironi muM uye S, asi haakwanise kuyambuka kunze kwekunge magetsi akashandiswa akadarika 0.2v, kukunda chipingamupinyi ichocho (yakabatanidzwa voltage). Kureva kuti ikozvino inoyerera.
- Reverse polarization: Muchiitiko ichi, iyo yakaipa yemagetsi yemagetsi ichabatanidzwa kune simbi side (anode), uye iyo yakanaka kune N-type semiconductor (cathode). Muchiitiko ichocho, hupamhi hwenharaunda yekuderera hunowedzera uye kuyerera kwezvino kunogurwa. Haasi ose azvino anogurwa kunyange, sezvo pane diki leakage ikozvino kuyerera nokuda thermally kufara maerekitironi musimbi. Kana iyo reverse bias voltage ichiwedzerwa, magetsi emagetsi anowedzera zvishoma nezvishoma nekuda kwekushaya simba kwechivharo. Uye kana ikasvika kune imwe kukosha, kamwe-kamwe kuwedzera kwemagetsi kunoitika, kuputsa nzvimbo yekuderedza uye kukuvadza Schottky diode zvachose.
Zvakanakira uye kuipa kweiyo Schottky diode
Semazuva ese nechero mudziyo kana system, iwe unogara uine zvayakanakira nezvayakaipira. Panyaya yeSchottky diode ivo vari:
Schottky Diode Advantages
- Low junction capacitance: Mune PN diode nzvimbo yekudzikisa inoumbwa nemitengo yakachengetwa uye pane capacitance. MuSchottky diode idzi mhosva hadzina basa.
- Fast reverse recovery time: ndiyo nguva iyo diode inotora kubva kuON (conductive) kuenda ku OFF (isina-conductive), ndiko kuti, kukurumidza kwekuchinja. Izvi zvine hukama nezviri pamusoro, sezvo kuti zvipfuure kubva kune imwe nyika kuenda kune imwe, mhosva dzakachengetwa munzvimbo yekuderera dzinofanira kuburitswa kana kubviswa, sezvo dzakaderera muSchottky, ichapfuura kubva kune imwe nhanho kuenda kune imwe nekukurumidza. .
- high current density: imwe mhedzisiro yezviri pamusoro ndeyekuti diki voltage inokwana kuburitsa yakakura ikozvino nekuti nzvimbo yekudzikira inenge isingaite.
- Yakaderera mberi voltage inodonha kana yakaderera ignition voltage: Iyo yakaderera kana ichienzaniswa neyakajairika PN junction diode, inowanzova 0.2v kusvika 0.3v, nepo PNs inowanzotenderedza 0.6 kana 0.7v. Kureva kuti, voltage shoma inodiwa kugadzira kuyerera kwazvino.
- Kubudirira kwepamusoro: maererano nezviri pamusoro, uye izvi zvinorevawo kushomeka kwekupisa mumaseketi emagetsi makuru.
- Inokodzera ma frequency epamusoro: Kuva nekukurumidza, vanogona kushanda nemazvo muRF application.
- Ruzha rushoma: Schottky diode inogadzira ruzha rusingadiwe pane yakajairika diode.
Schottky Diode Zvakaipa
Kuenzaniswa nemamwe bipolar diode, iyo Schottky diode ine imwechete inooneka yakashata:
- High reverse saturation current: inogadzira reverse saturation ikozvino yakakura kupfuura PN.
Misiyano ine PN junction diode
Kuti uwane rumwe ruzivo nezve izvo Schottky diode inogona kubatsira kupurojekiti yako, unogona kuona iyo yapfuura girafu ine macurves ePN silicon neGaAs diode, uye iyo Schottky mhando yeaya masemiconductors mamwe chete. Misiyano zvinonyanya kukosha ndezvi:
| Schottky diode | PN Junction Diode |
| Metal-semiconductor junction mhando N | PN semiconductor junction. |
| Kudonha kwemagetsi kumberi kwakaderera. | High forward voltage drop. |
| Yakaderera reverse kupora kurasikirwa uye kupora nguva. | Yakakwira reverse kupora kurasikirwa uye reverse kudzoreredza nguva. |
| Icho chiri unipolar. | Iye ari bi-polar. |
| Ikozvino inogadzirwa chete nekufamba kwema electrons. | Ikozvino inogadzirwa nekufamba kwemakomba uye maerekitironi. |
| Kuchinja speed. | Kuchinja kunononoka. |
Zvinokwanisika kushandiswa kweiyo Schottky diode
Schottky diodes yakajairika mune zvakawanda zvigadzirwa zvemagetsi. Zvinhu zvavo zvakasiyana uye zvakanakira pane mamwe diode zvinoreva kuti vanazvo zvikumbiro zvakasiyana se:
- Kune RF maseketi.
- semagetsi ekugadzirisa.
- Kune magetsi akasiyana-siyana.
- Mune masisitimu ane solar panels kuti avadzivirire kubva kune reverse kuchaja mabhatiri kwaanowanzo akabatana nawo.
- Uye zvakawanda ...
Uye nokuda kweizvi, vanogona kuratidzwa zvose zviri zviviri zvakasununguka, se yakaiswa muICs.
kupi kunotenga diode idzi
Kana iwe uchida maSchottky diodes emapurojekiti ako kana kutanga kuyedza nawo uye nekuanzwisisa zviri nani, unogona kuzviwana muzvitoro zvemagetsi akasiyana siyana, pamwe neAmazon. Heino iwe mamwe mazano:
- Briefcase ine mazana matatu diode emhando dzakasiyana: rectifiers uye Schottky.
- 20 Schottky diodes 15SQ045
- 20 Schottky diodes 1N5817