Lub rectifier diode nyob rau hauv lub switching fais fab mov yuav tsum muaj cov yam ntxwv ntawm pem hauv ntej voltage txo thiab ceev rov qab, thiab kuj muaj txaus tso zis zog. Cov nram qab no peb hom rectifier diodes yuav siv tau: ceev ceev rectifier diode; Ultra ceev rov qab rectifier diode; Schottky rectifier diode. Kev rov qab sai thiab rov qab sai sai rectifier diodes muaj nruab nrab thiab siab rau pem hauv ntej voltage poob, xws li ntawm 0.8 mus rau 1.2V. Ob lub diodes rectifying no kuj muaj kev txiav tawm hluav taws xob siab. Yog li ntawd, lawv yog tshwj xeeb tshaj yog haum rau siv nyob rau hauv lub low-power auxiliary power supply circuits nrog ib tug output voltage ntawm txog 12V.
Txij li thaum kev khiav hauj lwm zaus ntawm niaj hnub hloov fais fab mov yog siab tshaj 20kHz, lub sij hawm rov qab los ntawm lub ceev rov qab rectifier diode thiab lub ultra ceev rov qab rectifier diode yog txo mus rau nanosecond theem piv nrog rau cov dav rectifier diode, yog li cov efficiency ntawm lub hwj chim mov yog. kho tau zoo heev. Raws li kev paub dhau los, thaum xaiv qhov ceev rov qab rectifier diode, nws lub sijhawm rov qab rov qab yuav tsum yog tsawg kawg yog 1/3 ntawm lub sijhawm nce ntawm lub transistor hloov. Ob lub diodes rectifying no kuj txo qhov kev hloov pauv hluav taws xob, uas cuam tshuam ncaj qha rau lub ripple ntawm cov zis DC voltage. Tsis tas li ntawd, txawm hais tias lub suab nrov ntawm qee qhov rectifying diodes hu ua mos rov qab hom yog me me, lawv lub sijhawm rov qab rov qab yog qhov ntev, thiab qhov rov qab tam sim no kuj loj, uas ua rau muaj kev hloov pauv thiab tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev hloov fais fab mov.
Txawm hais tias qhov ceev rov qab rectifier diode thiab ultra ceev rov qab rectifier diode xav tau lub dab dej kub thaum lawv siv los ua cov khoom siv hauv cov khoom siv hluav taws xob hloov pauv yog nyob ntawm lub zog siab tshaj plaws ntawm Circuit Court. Feem ntau, qhov tso cai sib txuas ntawm cov diodes thaum lub sijhawm tsim khoom yog 175 degree, thiab cov chaw tsim khoom muaj cov kev qhia tshwj xeeb rau qhov ntsuas no los muab tus tsim qauv nrog qhov siab tshaj plaws ua haujlwm tam sim no, qhov hluav taws xob thiab lub plhaub kub. Txawm tias nyob rau hauv qhov kev txiav txim ntawm loj rau pem hauv ntej tam sim no, lub pem hauv ntej voltage poob ntawm Schottky rectifier diode yog tsawg heev, tsuas yog hais txog 0.4V. Tsis tas li ntawd, nrog rau qhov nce ntawm qhov kub thiab txias, qhov kev poob qis rau pem hauv ntej yog qis dua. Yog li ntawd, Schottky rectifier diode yog tshwj xeeb tshaj yog haum rau low-voltage output circuits ntawm txog 5V. Lub sij hawm rov qab los ntawm Schottky rectifying diode yog qhov tsis txaus ntseeg, vim tias cov cuab yeej no yog cov khoom siv semiconductor nrog ntau tus neeg nqa khoom. Thaum lub sij hawm hloov cov txheej txheem ntawm cov cuab yeej, tsis muaj teeb meem ntawm kev tshem tawm cov nqi khaws cia ntawm ob peb tus neeg nqa khoom.
Schottky rectifying diodes muaj ob qhov tsis zoo: ua ntej, lub peev xwm ntawm qhov rov qab txiav tawm qhov hluav taws xob tsawg, thiab cov khoom yog li 100V; Qhov thib ob, qhov rov qab xau tam sim no loj, uas ua rau lub cuab yeej muaj kev cuam tshuam rau thermal tawg dua li lwm hom khoom siv rectifier. Tau kawg, cov kev tsis zoo no kuj tuaj yeem kov yeej los ntawm kev ntxiv cov hluav taws xob tiv thaiv hluav taws xob tiv thaiv tam sim thiab tswj qhov kub ntawm qhov sib txuas. Cov yam ntxwv thiab cov yam ntxwv ntawm ib tug raug high-ceev rectifier diode yog qhia.
