Yuav ua li cas diodes pab nyob rau hauv stabilizing voltage nyob rau hauv cov khoom kho mob?

Ib, Lub hauv paus ntsiab lus tseem ceeb ntawm voltage regulator diode: controllability ntawm reverse breakdown cheeb tsam
Zener diode yog PN hlws ris ntaus ntawv tsim los ntawm cov txheej txheem tshwj xeeb, nrog rau nws cov yam ntxwv tseem ceeb yog qhov tsis tu ncua ntawm qhov chaw rov qab. Tsis zoo li cov diodes zoo tib yam, thaum qhov hluav taws xob rov qab mus txog qhov tseem ceeb (qhov hluav taws xob tawg), qhov tam sim no ntawm qhov hluav taws xob tswj hluav taws xob diode nce siab, tab sis qhov hluav taws xob ntawm ob qho kawg tseem tsis hloov pauv. Cov yam ntxwv no ua rau nws zoo tagnrho voltage regulator tivthaiv.

1. Kev soj ntsuam ntawm lub cev tshuab
PN junction breakdown: Thaum qhov hluav taws xob thim rov qab tshaj qhov hluav taws xob tawg, lub zog hluav taws xob sab hauv PN kev sib tshuam yog txaus kom tso cai rau cov neeg nqa khoom (electrons thiab qhov) kom tau txais lub zog txaus, ua rau kev sib tsoo ionization thiab tsim ntau tus neeg nqa khoom, uas ua rau muaj kev nce tam sim no.
Controllable breakdown: Los ntawm cov khoom siv doping thiab cov qauv tsim, kev tawg ntawm qhov hluav taws xob tswj hluav taws xob diode yog thim rov qab. Ntev npaum li qhov tam sim no tsis tshaj qhov ntsuas tus nqi, lub cuab yeej tuaj yeem rov qab nws cov yam ntxwv qub tom qab tshem tawm qhov rov qab voltage.
Voltage regulation range: Qhov voltage regulator value (Vz) ntawm ib voltage regulator diode feem ntau yog nyob nruab nrab ntawm 2.4V thiab 200V, npog txawv voltage theem uas yuav tsum tau los ntawm cov khoom kho mob.
2. Voltage regulator Circuit Court tsim
Zener diodes feem ntau yog siv nyob rau hauv series nrog tam sim no limiting resistors los ua ib tug parallel hom voltage regulator Circuit Court. Nws txoj haujlwm ua haujlwm yog raws li hauv qab no:

Thaum qhov voltage nce: Yog hais tias qhov input voltage (Usr) nce, load voltage (Usc) kuj nce. Lub voltage regulator diode ntsib kev thim rov qab, ua rau muaj kev nce ntxiv hauv qhov tam sim no thiab qhov nce hauv qhov hluav taws xob poob thoob plaws qhov kev txwv tam sim no, yog li offsetting qhov nce hauv Usr thiab tswj Usc stability.
Thaum qhov hluav taws xob txo qis: yog tias Usr txo qis, Usc txo qis, qhov tam sim no ntawm voltage regulator diode txo, qhov voltage poob ntawm tam sim no limiting resistor txo, offsetting txo Usr thiab tswj Usc stability.
Thaum lub load hloov: yog hais tias lub load tam sim no nce, qhov voltage poob ntawm tam sim no limiting resistor nce, thiab Usc txo. Tam sim no ntawm qhov voltage regulator diode txo, qhov voltage poob ntawm tam sim no limiting resistor txo, thiab Usc tseem ruaj khov.
Cov tsis tseem ceeb: Qhov me dua qhov kev ua haujlwm tsis zoo (Rz), qhov loj dua qhov kev txwv tam sim no (R), thiab siab dua qhov kev ruaj ntseg ntawm cov zis hluav taws xob. Piv txwv li, hauv electrocardiograph, siv 2CW52 voltage regulator diode (Vz=6.2}V) ua ke nrog 100 Ω tam sim no limiting resistor tuaj yeem compress cov input voltage fluctuation ntau ntawm ± 20% mus rau ± 1%, kom ntseeg tau tias cov teeb liab tau raug.

2, Cov xwm txheej ntawm daim ntawv thov hauv cov khoom siv kho mob
1. Portable cov khoom siv kho mob: sib npaug ntawm kev siv hluav taws xob tsawg thiab kev ntseeg siab
Hauv cov khoom siv xws li cov ntsuas ntshav qabzib thiab cov khoom siv hluav taws xob ultrasound, Schottky diodes (xws li BAT54S) tau dhau los ua qhov kev xaiv zoo tshaj plaws rau kev tiv thaiv kev sib txuas thiab kev tiv thaiv hluav taws xob vim lawv qhov qis qis qis qis (0.15-0.45V) thiab cov yam ntxwv hloov ceev. Piv txwv li:

Kev tiv thaiv kev tiv thaiv kev tiv thaiv rov qab: Txuas lub Schottky diode nyob rau hauv tib lub sijhawm ntawm lub hwj chim input davhlau ya nyob twg. Thaum lub hwj chim polarity thim rov qab, lub diode yuav thim rov qab thiab txiav tawm, thaiv txoj hauv kev tam sim no thiab tiv thaiv cov hluav taws xob sab hauv ntawm hluav taws xob.
Kev xaiv txoj kev fais fab: Hauv ob lub roj teeb hluav taws xob, cov khoom siv hluav taws xob tseem ceeb thiab cov khoom siv hluav taws xob tau hloov pauv los ntawm diodes kom ntseeg tau tias lub zog txuas ntxiv mus. Piv txwv li, ib qho qauv ntawm kev saib xyuas nqa tau siv ob lub BAT54S kev sib txuas ua ke kom ua tiav kev tsim hluav taws xob rov ua dua, uas tseem tuaj yeem tswj xyuas kev ua haujlwm thaum lub roj teeb tsis ua haujlwm.
2. Cov cuab yeej siv kho mob siab zog: cuam tshuam tsis kam thiab kev ua kom zoo dua qub
Hauv cov khoom siv xws li defibrillators thiab siab - rab riam fais fab, nws yog ib qho tsim nyog los daws cov kev kub ntxhov tam sim no. Nyob rau ntawm lub sijhawm no, ceev rov qab diodes (FRDs) thiab silicon carbide (SiC) diodes dhau los ua cov khoom tseem ceeb:

Defibrillator charging circuit: MBR30200PT Schottky module (30A/200V) yog siv, nrog lub sij hawm rov qab (trr) tsawg dua 5ns, uas tuaj yeem tiv thaiv qhov hluav taws xob tsis zoo los ntawm diode hloov qeeb thaum them thiab tiv thaiv siab -voltage capacitors los ntawm overvoltage breakdown.
High zaus hluav taws xob riam tso zis theem: siv C6D10065A SiC Schottky diode (100A / 650V), nws qis rau pem hauv ntej voltage poob (1.5V) thiab kub kub kuj yam ntxwv (175℃hlws ris kub) xyuas kom meej tias lub diode tus kheej lub hwj chim noj yog txo los ntawm 60% thaum lub sij hawm 1MHz siab -frequency deg.
3. Cov cuab yeej kho mob Precision: teeb liab kev ncaj ncees thiab tiv thaiv -kev cuam tshuam tsim
Hauv cov khoom siv xws li electrocardiographs thiab electroencephalographs, kev nrhiav tau ntawm cov teeb liab bioelectric tsis muaj zog yuav tsum tau nruj nruj ntawm lub suab nrov. Lub sijhawm no, kev sib koom tes tsim ntawm photodiodes thiab kev tiv thaiv diodes dhau los ua qhov tseem ceeb:

Optoelectronic coupling isolation: Nyob rau hauv lub teeb liab input channel, 6N137 optocoupler yog siv los ua kom tau hluav taws xob cais thiab thaiv cov hom kev cuam tshuam los ntawm photoelectric hloov dua siab tshiab ntawm diodes. Piv txwv li, ib qho qauv ntawm electroencephalograph ua rau kom cov input impedance mus rau 10M Ω los ntawm photoelectric coupling, thiab cov hom kev tsis pom zoo piv (CMRR) mus txog 120dB.
Kev tiv thaiv ESD: Ntawm qhov sib txuas sensor, parallel ESD5D150TA Schottky diode nrog cov xau qis tam sim no (<0.1 μ A) and high reverse withstand voltage (150V) can effectively discharge the transient current generated by electrostatic discharge (ESD) and prevent sensor damage.
3, Lub tswv yim voltage stabilization tov: kev sib koom tsim ntawm diodes thiab lwm yam khoom
1. Composite tiv thaiv Circuit Court: diode + TVS diode
Nyob rau hauv daim duab kis tau tus mob ntawm kev kho mob endoscopes, ib tug composite tiv thaiv tswvyim ntawm "Schottky diode + TVS diode" yog saws los tiv thaiv overvoltage los ntawm xob laim ntaus los yog hluav taws xob zoo li qub:

Schottky diode: parallel txuas nrog lub hwj chim input davhlau ya nyob twg, muab kev tiv thaiv kev thim rov qab txhua hnub.
TVS diode: series txuas nrog lub teeb liab kab, nws lub sijhawm teb ceev ceev (<1ps) and low clamping voltage (such as SMAJ5.0A's clamping voltage of 7.8V) can limit overvoltage within a safe range in nanoseconds, protecting the downstream ADC chip from damage.
2. Kev tiv thaiv tus kheej: diode + PTC thermistor
Hauv kev them nqi hluav taws xob ntawm cov khoom siv kho mob uas siv tau (xws li cov hlua tes ntse), kev tiv thaiv tus kheej ntawm "Schottky diode + PTC thermistor" tau txais yuav:

Schottky diode: tiv thaiv lub roj teeb rov qab kev sib txuas thaum siv nws cov yam ntxwv qis qis kom txo qis kev them nyiaj.
PTC thermistor: series txuas nrog rau txoj kev them nyiaj, thaum lub sijhawm tam sim no tshaj qhov pib, PTC kuj tus nqi nce siab, txwv qhov tam sim no; Tom qab kev daws teeb meem, PTC cia li rov qab mus rau lub xeev tsis muaj zog yam tsis tas yuav hloov cov khoom.
3. Kev daws teeb meem zoo tshaj plaws diode: kev sib koom ua ke thiab kev txawj ntse
Nrog rau qhov muaj koob meej ntawm cov ntaub ntawv dav dav, kev sib xyaw ua ke zoo tshaj plaws diodes (xws li LM66100DCK) tau dhau los ua qhov kev xaiv zoo tshaj plaws rau siab - cov khoom siv kho mob kawg. Nws txoj haujlwm ua haujlwm yog raws li hauv qab no:

Fais fab adapter mov: Txiav HOM-C tso zis los ntawm PMOS txiav tawm sab hauv.
HOM-C fais fab mov: tso zis 5V voltage los ntawm PMOS conduction sab hauv.
Roj teeb powered: Thaum ob qho tib si point A thiab point C muaj peev xwm ntawm 0V, lub PMOS sab hauv ua thiab lub roj teeb muab lub zog rau lub nra.
Cov tshuaj no muaj qhov zoo ntawm kev tiv thaiv kev tiv thaiv, txo qis qis, tsis muaj kev tiv thaiv sab hauv, thiab tsis tshua muaj cua sov, thiab yog siv dav hauv portable ultrasound, endoscope thiab lwm yam khoom siv.