TL431中文資料簡(jiǎn)介

TL431中文資料簡(jiǎn)介介紹:TL431是一個(gè)有優(yōu)秀的熱穩(wěn)固性能的三端可調(diào)分流基準(zhǔn)電壓源。它的輸出電壓用兩個(gè)電阻就能夠隨意地設(shè)置到從Vref〔2.5V〕到36V范圍內(nèi)的任何值。該器件的典型動(dòng)向阻抗為

0.2Ω，在好多應(yīng)用中能夠用它取代齊納二極管，比如，數(shù)字電壓表，運(yùn)放電路、可調(diào)壓電源，開關(guān)電源等等。特色：?可編程輸出電壓為

36V?電壓參照偏差：±

0.4％

，典型值@25℃〔

TL431B〕?低動(dòng)向輸出阻抗，典型

0.22Ω?負(fù)載電流才能

1.0mAto100mA?等效全范圍溫度系數(shù)50ppm/℃典型溫度賠償操作全額定工作溫度范圍?低輸出噪聲電壓圖1TO92封裝引腳圖圖28腳封裝引腳功能圖3SOP-8貼片封裝引腳圖圖4TL431符號(hào)及內(nèi)部方框圖圖

5TL431

內(nèi)部電路圖MAXIMUMRATINGS(Fulloperatingambienttemperaturerangeapplies,unless最大額定值〔環(huán)境溫度范圍合用，除非還有說(shuō)明。otherwisenoted.)

〕Rating

參數(shù)

Symbol

數(shù)值

Unit符號(hào)單位CathodetoAnodeVoltage陰極陽(yáng)極電壓VKA37VCathodeCurrentRange,Continuous陰極電流范圍，連續(xù)IK–100to+150mAReferenceInputCurrentRange,Continuous參照輸入電流范圍，連續(xù)Iref–0.05to+10mAOperatingJunctionTemperature工作結(jié)溫TJ150℃OperatingAmbientTL431I,TL431AI,TL431BI–40to+85TemperatureRange操作環(huán)境TA℃溫度范圍TL431C,TL431AC,TL431BC0to+70StorageTemperatureRange儲(chǔ)藏溫度范圍Tstg–65to+150℃TotalPowerDissipation總D,LP后綴塑封耗散功率常溫@TA=25℃P后綴塑封PD1.10WDerateabove25℃AmbientTemperatureDM后綴塑封TotalPowerDissipation@TCD,LP后綴塑封1.5=25℃Derateabove25℃PDWCaseTemperature總耗散功P后綴塑封率外殼溫度RECOMMENDEDOPERATINGCONDITIONS建議操作條件Condition條件SymbolMin最大值Max最小值Unit符號(hào)單位CathodetoAnodeVoltage陰極陽(yáng)極電壓VKAVref36VCathodeCurrent陰極電流IK1.0100mATHERMALCHARACTERISTICS熱特征SymbolD,LP后綴封DM后綴封裝UnitCharacteristic特征裝P后綴封裝單位符號(hào)ThermalResistance,Junction–to–Ambient熱阻，結(jié)點(diǎn)到環(huán)RqJA178114240℃/W境ThermalResistance,8341–℃/WRqJCJunction–to–Case熱阻，結(jié)到外殼ELECTRICALCHARACTERISTICS(TA=25℃,unlessotherwisenoted.)電氣特征〔25℃，除非另有說(shuō)明。〕CharacteristicReferenceInputVoltage(Figure參照輸入電壓VKA=Vref,IK=10mA

SymbolTL431ITL431C特征最小符號(hào)最小值典型值最大值典型值最大值值TA=25℃2.442.4952.552.442.4952.55TA=TlowtoVref–2.423–Thigh(Note1)

Unit單位VReferenceInputVoltageDeviationOverTemperatureRange參照輸入電–7.030–3.017壓傾向溫度范圍(Figure1,NotesDVref1,2)VKA=Vref,IK=10mARatioofChange△VKA=10Vto––1.4–2.7––1.4–2.7inReferenceVrefInputVoltageto△VrefChangeinCathode△VKAtoAnodeVoltage-–1.0–2.0△VKA=36Vto10V–IK=10mA(Figure2),ReferenceInputTA=25℃–1.84.0–1.84.0Current(Figure2)參照輸入電流TA=TlowtoIref––––5.2IK=10mA,R1=Thigh(Note1)10k,R2=∞ReferenceInputCurrentDeviationOverTemperatureRange參照輸入電–0.82.5–0.41.2流傾向溫度范圍(Figure2,Note1,DIref4)IK=10mA,R1=10k,R2=∞MinimumCathodeCurrentForRegulationVKA=Vref(Figure1)最I(lǐng)min–0.51.0–0.51.0小陰極電流調(diào)理Off–StateCathodeCurrent(Figure3)VKA=36V,Vref=0V斷態(tài)陰Ioff–2601000–2601000極電流DynamicImpedance(Figure1,Note3)動(dòng)向阻抗VKA=Vref,DIK=1.0mA|ZKA|–0.220.5–0.220.5to100mAf31.0kHzELECTRICALCHARACTERISTICS(TA=℃25,unlessotherwisenoted.)電氣特征〔25℃，除非還有說(shuō)明?！?/p>

mVmV/VAAmAnAΩTA=TlowtoThigh(Note1)VKA=Vref,△VKA=10VtoVref△VKA=36Vto10VTA=25℃參照輸入電Characteristic特征ReferenceTA=25℃InputVoltage(Figure1)參TA=Tlowto考輸入電壓ThighVKA=Vref,IK=10mAReferenceInputVoltageDeviationOverTemperatureRange(Figure1,Notes1,2)壓傾向溫度范圍IK=10mARatioofChangeinReferenceInputVoltagetoChangeinCathodetoAnodeVoltageIK=mA(Figure2),ReferenceInputCurrent(Figure2)參照輸入電流IK=10mA,R1=10k,R2=∞ReferenceInputCurrentDeviationOverTemperatureRange(Figure2,Note1)IK=10mA,R110k,R2=∞參照輸入電流傾向溫度范圍MinimumCathodeCurrentForRegulation最小陰極電流調(diào)理VKA=Vref(Figure1)

SymbolTL431AITL431ACTL431BIU最大符號(hào)最小值典型值最大值最小值典型值最大值最小值典型值值位2.472.4952.522.472.4952.522.4832.4952.507VrefV2.44––2.515DVref–7.030–3.017–3.017m––1.4–2.7––1.4–2.7––1.4–2.7VrefmVKA––––2.0Iref––1.84.0–1.84.0–1.12.0μ–6.5––––4.0DIref–0.82.5–0.41.2–0.82.5μImin–0.51.0–0.51.0–0.51.0mOff–StateCathodeCurrent(Figure3)斷態(tài)陰Ioff–2601000–2601000–230500nA極電流VKA=36V,Vref=0VDynamicImpedance(Figure1,Note3)VKA=Vref,DIK–0.220.5–0.220.5–0.140.3Ω|ZKA|1.0mAto100mAf31.0kHz動(dòng)向阻抗圖

6

測(cè)試電路VKA=Vref

圖7

測(cè)試電路

VKA>Vref

圖8

測(cè)試電路

forIoff曲線圖：圖9陰極電流與陰極電壓圖10陰極電流與陰極電壓圖11參照輸入電壓與常溫圖12參照輸入電流與常溫圖13變化的參照輸入電壓與陰極電壓圖14斷態(tài)陰極電流隨環(huán)境溫度圖15動(dòng)向阻抗與頻率圖16動(dòng)向阻抗隨環(huán)境溫度圖17開環(huán)電壓增益與頻率圖18譜噪聲密度圖19脈沖響應(yīng)圖20穩(wěn)固的界限條件應(yīng)用法：圖21測(cè)試電路曲線a界限條件的穩(wěn)固性圖22曲線測(cè)試電路的B，C和D界限條件的穩(wěn)固性圖23并聯(lián)穩(wěn)壓器電路圖圖24大電流并聯(lián)穩(wěn)壓