Lub luag haujlwm ntawm diodes hauv kev kho mob fais fab modules yog dab tsi?

1, Rectification: Hloov hloov tam sim no rau hauv "ntshiab ncaj qha tam sim no" xav tau rau lub neej
Cov cuab yeej kho mob yuav tsum muaj kev ruaj ntseg ntawm lub hwj chim. Piv txwv li, X-ray raj ntawm CT scanner yuav tsum muaj qhov txuas ntxiv thiab ruaj khov DC high voltage (feem ntau kaum ntawm kilovolts), thaum lub teeb liab tau txais Circuit Court ntawm electrocardiograph cia siab rau qis - suab nrov, qis ripple DC fais fab mov. Lub diode hloov lub zog loj (220V / 50Hz AC) mus rau hauv lub zog DC los ntawm kev hloov kho, muab lub hauv paus rau kev lim dej tom ntej thiab qhov hluav taws xob stabilization circuits.

Cov kev siv ntawm choj rectifier Circuit Court
Hauv kev kho mob fais fab modules, choj rectifier circuits tau dav siv vim lawv cov kev ua haujlwm siab thiab cov yam ntxwv qis. Ua ib qho qauv ntawm lub tshuab hemodialysis ua piv txwv, nws lub zog module txais plaub 1N5408 silicon rectifier diodes (rated tam sim no 3A, thim rov qab tiv thaiv voltage 1000V) los tsim ib lub voj voog tag nrho yoj rectifier circuit. Thaum AC lub zog nkag, lub diode ua rau hauv qhov zoo ib nrab voj voog thiab nres hauv qhov tsis zoo ib nrab voj voog, hloov lub zog AC rau hauv lub zog DC. Tom qab lim los ntawm lub capacitor, nws tso tawm qhov hluav taws xob DC du rau lub hwj chim loads xws li cov twj lim dej thiab cov cua sov. Qhov kev tsim no txhim kho kev siv hluav taws xob ntau dua 85%, thaum tswj qhov hluav taws xob ripple hauv 0.5%, ua tau raws li cov kev cai nruj ntawm cov khoom siv kho mob rau lub hwj chim purity.
Synchronous rectification technology nyob rau hauv siab - zaus hloov fais fab mov
Nrog rau kev txhim kho cov cuab yeej kho mob mus rau qhov me me thiab siv hluav taws xob tsawg, siab - zaus hloov cov khoom siv hluav taws xob tau maj mam dhau los ua qhov tseem ceeb. Ib txwm diodes muaj kev hloov pauv tseem ceeb thiab txo lub zog ua haujlwm vim lawv lub sijhawm rov qab mus ntev (feem ntau ntau pua nanoseconds) thaum lub sijhawm siab - zaus hloov. Yog li ntawd, Schottky diodes lossis synchronous rectification MOSFETs tau siv los hloov cov diodes zoo tib yam hauv kev kho mob fais fab modules. Piv txwv li, lub hwj chim module ntawm lub portable ultrasound diagnostic ntaus ntawv siv MBR2045CT Schottky diode (forward voltage poob 0.45V, thim rov qab lub sij hawm.<10ns), which reduces rectification losses by 60% at a switching frequency of 400kHz, reduces the size of the power module by 40%, and meets the device's requirements for low heat generation and long battery life.
2, Voltage stabilization thiab kev tiv thaiv: tsim "kev ruaj ntseg kab" rau kev kho mob fais fab mov
Cov cuab yeej kho mob muaj ntau qhov yuav tsum tau ua rau lub zog ruaj khov dua li cov khoom siv hluav taws xob zoo tib yam. Kev hloov pauv hluav taws xob tuaj yeem ua rau CT duab kos duab, saib xyuas cov ntaub ntawv cuam tshuam, thiab tseem ua rau muaj kev phom sij rau cov neeg mob kev nyab xeeb. Lub diode muab kev tiv thaiv dual rau kev kho mob fais fab modules los ntawm kev tswj hluav taws xob thiab kev tiv thaiv kev ua haujlwm.

TVS diode: lub vanguard ntawm kev hloov hluav taws xob hloov pauv
Hauv qhov chaw kho mob, cov khoom siv hluav taws xob tuaj yeem ntsib qhov hluav taws xob tshwm sim los ntawm xob laim tawm tsam, electrostatic tawm (ESD), lossis cov cuab yeej pib nres. TVS diodes tuaj yeem clamp qhov hluav taws xob hloov pauv mus rau theem kev nyab xeeb hauv lub sijhawm picosecond los ntawm cov yam ntxwv ntawm avalanche tawg. Piv txwv li, lub hwj chim module ntawm lub teeb tsis muaj duab ntxoov ntxoo nyob rau hauv ib chav ua haujlwm siv SMAJ5.0A TVS diodes (kev tawg voltage 5V, ncov mem tes zog 400W). Thaum lub input voltage dheev nce mus rau 300V vim yog xob laim ntaus, TVS diode ua nyob rau hauv 10ns, clamping lub voltage mus rau 5.8V thiab tiv thaiv lub tom ntej Circuit Court los ntawm kev puas tsuaj. Qhov kev tsim no txo ​​qhov tsis ua haujlwm ntawm cov teeb tsis muaj duab ntxoov ntxoo los ntawm 80% thiab txo cov nqi kho txhua xyoo los ntawm kwv yees li 120000 yuan.
Zener diode: qhov tseeb voltage siv rau kev cai
Hauv cov cuab yeej kuaj mob, xws li biochemical analyzers, ntshav cell counters, thiab lwm yam, lub sensor Circuit Court yuav tsum muaj qhov tseeb siv voltage. Zener diodes tswj qhov hluav taws xob tas li thaum qhov hluav taws xob thim rov qab mus txog qhov tawg hluav taws xob vim lawv cov yam ntxwv ntawm Zener tawg. Piv txwv li, lub hwj chim module ntawm ib tug tag nrho tsis siv neeg biochemical analyzer siv ib tug 1N4744A hom voltage regulator diode (voltage regulator tus nqi ntawm 15V, lub hwj chim ntawm 1W) los muab ib tug ruaj khov siv voltage rau optical txoj kev nrhiav kom tau Circuit Court, thiaj li hais tias qhov repeatability yuam kev ntawm lub nrhiav kom tau raug tswj nyob rau hauv ± 1%, raws li clinosis accuracy.
3, Kev ua cov teeb liab: txhim kho "cov ntaub ntawv raug" ntawm kev kuaj mob
Hauv cov khoom siv hluav taws xob kho mob, diodes tsis yog tsuas yog siv hauv cov khoom siv hluav taws xob xwb, tab sis kuj tseem koom nrog kev ua cov teeb liab, cuam tshuam ncaj qha rau kev ntseeg siab ntawm cov ntaub ntawv kuaj mob.

Ntes diode: "filter" rau rho tawm cov cim tseem ceeb
Hauv cov khoom siv xws li electrocardiographs thiab electroencephalographs, kev kuaj pom diodes yog siv los rho tawm tsawg- zaus bioelectric signals los ntawm siab - cov neeg nqa khoom zaus. Piv txwv li, lub teeb liab ua Circuit Court ntawm 12 lead electrocardiogram tshuab siv 1N5711 Schottky detector diode (hluav taws xob capacitance 0.2pF, lub sij hawm rov qab los.<1ns), which can efficiently detect electrocardiogram signals with frequencies of 0.05-100Hz, while suppressing 50Hz power frequency interference, increasing the signal-to-noise ratio to above 60dB, providing doctors with clear electrocardiogram waveforms.
Limiting diode: "kev nyab xeeb valve" uas tiv thaiv cov teeb liab saw
Hauv cov khoom siv kho mob, xws li X- tshuab hluav taws xob, CT scanners, thiab lwm yam, cov teeb liab tso tawm los ntawm lawv cov cuab yeej kuaj pom yuav muaj hluav taws xob overshoot vim cov cuab yeej tsis ua hauj lwm lossis kev cuam tshuam sab nraud. Lub limiting diode txwv lub teeb liab amplitude nyob rau hauv ib qho kev nyab xeeb ntau yam los ntawm nws cov yam ntxwv ceev conduction. Piv txwv li, tus ntes teeb liab ua Circuit Court ntawm 64 kab CT scanner siv BAS70-04 hom limiting diode (reverse breakdown voltage 7V, teb lub sij hawm<1ns). When the signal voltage exceeds ± 7V, the diode conducts, clamping the voltage to a safe level to avoid damage to the subsequent ADC (analog-to-digital converter) and ensure the integrity of image data.
4, Kev lag luam sib txawv: Diode thev naus laus zis tsav kev tsim kho tshiab hauv kev kho mob hluav taws xob
Nrog rau kev txhim kho cov cuab yeej siv kho mob rau kev txawj ntse, kev txav mus los, thiab kev ua haujlwm siab, diode thev naus laus zis kuj tseem niaj hnub ua haujlwm, nqa qhov muaj peev xwm tshiab rau cov khoom siv hluav taws xob kho mob.

Qhov sawv ntawm dav bandgap semiconductor diodes
Wide bandgap semiconductor cov ntaub ntawv uas sawv cev los ntawm silicon carbide (SiC) thiab gallium nitride (GaN) yog maj mam hloov cov tsoos silicon -raws li diodes vim lawv cov high breakdown voltage, tsis tshua muaj zog, thiab siab - zaus yam ntxwv. Piv txwv li, SiC Schottky diodes tuaj yeem ua rau ntau zaus hloov mus rau ntau dua 1MHz hauv kev kho mob siab - zaus hloov cov khoom siv hluav taws xob, txo qhov loj ntawm cov khoom siv hluav taws xob los ntawm 50% thiab nce kev ua tau zoo mus rau ntau dua 95%, ua tau raws li qhov yuav tsum tau ua thiab ntev ntev ntawm cov khoom siv kho mob.
Integrated thiab modular tsim
Txhawm rau kom yooj yim rau kev tsim kho lub zog siv hluav taws xob, diodes tau koom ua ke nrog lwm cov khoom xws li MOSFETs, capacitors, thiab resistors los tsim lub zog tswj module (PMM). Piv txwv li, lub hwj chim module ntawm lub portable ultrasound diagnostic ntaus ntawv siv ib tug PMM integrated nrog SiC diodes, uas integrates rectification, voltage regulation, thiab kev tiv thaiv functions ntawm ib nti, txo qhov luaj li cas ntawm lub hwj chim module los ntawm 60%, shortening lub voj voog txoj kev loj hlob los ntawm 40%, thiab txo cov nqi zog los ntawm 15%.