Yuav ua li cas siv diodes hauv kev kho mob hluav taws xob tiv thaiv kev tiv thaiv?

Ib, Lub hauv paus ntsiab lus tseem ceeb ntawm kev tiv thaiv kev sib cais yog txhawm rau thaiv txoj hauv kev hluav taws xob thiab txwv kev cuam tshuam kev nthuav tawm
Lub hom phiaj tseem ceeb ntawm kev kho mob hluav taws xob cais tawm yog txiav tawm qhov hluav taws xob ncaj qha ntawm tus neeg mob lub voj voog thiab lub zog hluav taws xob, tiv thaiv cov dej ntws tawm los ntawm tib neeg lub cev thiab tsim micro hluav taws xob shocks (tso cai tus nqi tsawg dua lossis sib npaug li 10 μ A). Lub diode ua tiav kev tiv thaiv kev sib cais los ntawm cov txheej txheem hauv qab no:

Unidirectional conductivity thaiv qhov thim rov qab tam sim no: Hauv kev tsim hluav taws xob sib cais, diodes tau ua ke nrog cov khoom siv xws li transformers thiab optocouplers los tsim txoj hauv kev unidirectional tam sim no. Piv txwv li, nyob rau hauv ib tug flyback converter, cov zis diode tsuas yog tso cai rau tam sim no ntws los ntawm lub thib ob ntawm lub transformer mus rau lub load, thaiv rov qab tam sim no thiab tsis txhob ua txhaum nyob rau hauv lub mains sab los ntawm kev cuam tshuam tus neeg mob Circuit Court.
Clamp voltage suppression transient overvoltage: Transient voltage suppression diodes (TVS) tuaj yeem teb rau cov xwm txheej overvoltage hauv nanoseconds thiab clamp qhov hluav taws xob mus rau theem kev nyab xeeb. Ntawm lub hwj chim tawm tswv yim kawg ntawm cov cuab yeej kho mob, TVS diodes tuaj yeem nqus cov kev cuam tshuam xws li xob laim thiab hluav taws xob ceev ceev (EFT), tiv thaiv cov kab hluav taws xob qis los ntawm kev kub ntxhov.
Optoelectronic cais tawm rau cov teeb liab kis tau tus mob: Lub teeb -emitting diode thiab photodiode nyob rau hauv lub optocoupler xa hluav taws xob teeb liab los ntawm optical signals, kiag li cais cov hluav taws xob kev twb kev txuas ntawm input thiab output terminals. Piv txwv li, nyob rau hauv ib lub tshuab electrocardiogram cais, lub optocoupler converts tus neeg mob lub nto hluav taws xob teeb liab mus rau hauv ib tug optical teeb liab, uas yog rov qab mus rau ib tug hluav taws xob teeb liab kom tshem tawm cov av cuam tshuam.
2, Daim ntawv thov scenario: Tag nrho cov kev pab cuam los ntawm chav khiav hauj lwm mus rau portable pab kiag li lawm
1. Kev rho tawm hluav taws xob rau chav ua haujlwm
Chav Kawm II cov chaw kho mob xws li chav ua haujlwm yuav tsum tau txais IT systems (ungrounded power supply mode) thiab tsim kom muaj kev ruaj ntseg fais fab mov network los ntawm kev sib cais transformers, rwb thaiv tsev saib xyuas, thiab tswb terminals. Lub diode plays ob lub luag haujlwm hauv qhov system no:

Flyback converter rho tawm: Hauv ib qho kev sib cais DC / DC converter, diodes thiab transformers ua hauj lwm ua ke kom ua tiav cov tswv yim - tso zis cais. Piv txwv li, Lingli Te LT8300 nti infers cov zis hluav taws xob los ntawm kev kuaj xyuas lub ntsiab lus hluav taws xob ntawm lub tshuab hluav taws xob, thiab tuaj yeem ua tiav kev tawm tswv yim cais tsis tas yuav tsum muaj optocouplers, yooj yim tsim thiab txhim kho kev ntseeg tau.
Kev tiv thaiv kev tiv thaiv hluav taws xob: Thaum muaj qhov cuam tshuam hauv av tshwm sim nyob rau sab thib ob ntawm qhov kev sib cais ntawm qhov hloov pauv, lub diode clamp Circuit Court txwv cov xau tam sim no mus rau qib microampere kom tsis txhob muaj kev pheej hmoo ntawm hluav taws xob poob rau tus neeg mob. Nyob rau tib lub sijhawm, cov cuab yeej ntsuas ntsuas hluav taws xob ua rau lub tswb nrov los ntawm kev saib xyuas cov kev hloov pauv ntawm cov rwb thaiv tsev, ua kom muaj kev nyab xeeb ntawm kev phais.
2. Kev tiv thaiv hluav taws xob rau cov khoom siv kho mob portable
Portable monitors, infusion twj, thiab lwm yam khoom siv yuav tsum ua haujlwm ruaj khov nyob rau hauv ib puag ncig electromagnetic, thiab diodes muab kev tiv thaiv los ntawm cov hauv qab no:

Kev tiv thaiv ESD: Hauv txoj kev tau txais ECG teeb liab, SMBJ5.0CA TVS diode clamps cov hluav taws xob hluav taws xob tawm hluav taws xob mus rau qib kev nyab xeeb, tiv thaiv cov khoom siv hluav taws xob siab impedance instrumentation amplifiers los ntawm kev puas tsuaj. Nws lub sijhawm teb mus txog qib picosecond, uas tuaj yeem cuam tshuam tib neeg hluav taws xob zoo li qub (± 15kV) thiab hluav taws xob zoo li qub tsim los ntawm cov khoom siv sib txhuam.
Kev tiv thaiv hluav taws xob rov qab: Hauv lub hnub ci photovoltaic auxiliary fais fab mov system, diodes tiv thaiv kev thim rov qab ntawm daim phiaj tam sim no rau hauv lub vaj huam sib luag photovoltaic, zam cov khoom puas. Piv txwv li, thaum hmo ntuj lossis hnub pos huab, lub diode cutoff yam ntxwv tuaj yeem thaiv qhov rov qab tam sim no, ua kom muaj kev nyab xeeb ntawm inverter.
3. Kev tswj fais fab ntawm siab - cov khoom siv phais ntau zaus
Cov riam hluav taws xob ntau zaus, cov cuab yeej siv kho laser, thiab lwm yam khoom siv yuav tsum muaj kev tswj xyuas lub zog ntawm cov zis, thiab diodes ua tiav kev tiv thaiv los ntawm cov txheej txheem hauv qab no:

Fast Recovery Diode (FRD) freewheeling: Nyob rau hauv lub cev muaj zog tsav circuits, FRD muab ib tug rov qab txoj kev tam sim no thaum lub relay yog powered, absorbing lub zog ntawm lub cev muaj zog electromotive quab yuam thiab tiv thaiv lub hwj chim pab kiag li lawm los ntawm voltage surges. Nws lub sijhawm rov qab rov qab tau luv luv rau 20ns, uas yog 30% ntau dua li cov khoom siv silicon diodes.
Kev tswj hwm lub zog laser: Los ntawm kev siv lub diode rov qab sai thiab MOSFET los ua ib qho kev hloov pauv, lub kaum sab xis ntawm lub diode raug kho kom tswj tau qhov kev tsav tsheb tam sim no ntawm lub laser diode, ua tiav cov khoom siv hluav taws xob tsis tu ncua thaum tiv thaiv kev puas tsuaj rau lub laser.
3, Technology xaiv thiab optimization lub tswv yim: ntsuas kev ua tau zoo, tus nqi, thiab kev ntseeg tau
1. Ntaus parameter sib piv
TVS diode xaiv: Parameters xws li qhov siab tshaj plaws clamping voltage (VC), yam tsawg kawg nkaus tawg voltage (VBR), thiab ncov mem tes zog (PPP) yuav tsum tau xav txog. Piv txwv li, hauv 220V AC input circuit, TVS diodes nrog Vbr Ntau dua lossis sib npaug ntawm 600V thiab PPP Ntau dua lossis sib npaug ntawm 600W yuav tsum raug xaiv kom ntseeg tau tias cov cuab yeej muaj kev nyab xeeb hauv qab xob laim (8/20 μs waveform).
Kev rho tawm diode tiv taus qhov hluav taws xob: Hauv cov khoom siv hluav taws xob sib cais, qhov rov qab tiv thaiv hluav taws xob ntawm lub diode yuav tsum yog 1.5 npaug siab dua qhov nruab nrab ntawm qhov hloov pauv. Piv txwv li, nyob rau hauv ib tug 48V tso zis system, Schottky diodes nrog reverse withstand voltage Ntau tshaj los yog sib npaug zos rau 100V yuav tsum tau xaiv kom tsis txhob muaj voltage breakdowns.
2. Topology innovation
Kev tiv thaiv ntau theem: siv "GDT + MOV + TVS" peb - qib kev tiv thaiv, GDT absorbs thawj surge zog, MOV suppresses intermediate overvoltage, TVS clamps residual voltage, thiab ua tiav lub zog attenuation kauj ruam. Piv txwv li, hauv kev kho mob X-ray tshuab hluav taws xob cov khoom siv hluav taws xob, cov khoom siv hluav taws xob no tuaj yeem txo cov hluav taws xob hluav taws xob los ntawm 8kV mus rau qib kev nyab xeeb.
Integrated tiv thaiv module: Xaiv TVS diode array los yog ESD tiv thaiv module kom txo tau PCB layout qhov chaw. Piv txwv li, Littelfuse SP1003 series TVS array tuaj yeem ua ke plaub lub teeb liab tiv thaiv ntawm ib nti, txo qhov cuam tshuam ntawm cov kab mob cab rau ntawm qhov siab - ceev cov cim.
3. Kev tswj cua sov thiab kev txhim kho kev ntseeg siab
Thaum tshav kub kub dissipation tsim: Hauv siab - daim ntawv thov fais fab, diodes yuav tsum tau nruab nrog cov dab dej kub los yog cov dab dej kub. Piv txwv li, nyob rau hauv kev kho mob sib nqus resonance imaging (MRI) gradient amplifiers, SiC Schottky diodes dissipate tshav kub los ntawm ib tug tooj liab substrate los xyuas kom meej qhov sib txuas kub hauv qab 150 degree.
Kev tsim kho tsis tu ncua: Parallel ntau lub diodes nyob rau hauv qhov tseem ceeb circuits los txhim kho kev ua txhaum cai kam rau ua. Piv txwv li, nyob rau hauv lub siab -voltage capacitor charging Circuit Court ntawm ib tug defibrillator, dual TVS diodes txuas nyob rau hauv parallel los tiv thaiv cov cuab yeej tsis ua hauj lwm los ntawm ib qho tsis ua hauj lwm point.