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1、TL431中文資料簡介TL431中文資料簡介介紹:?TL431是一個(gè)有良好的熱穩(wěn)定性能的三端可調(diào)分流基準(zhǔn)電壓源。它的輸出電壓用兩個(gè)電阻就可以任意地設(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)態(tài)阻抗為0.2Ω，在很多應(yīng)用中可以用它代替齊納二極管，例如，數(shù)字電壓表，運(yùn)放電路、可調(diào)壓電源，開關(guān)電源等等。特點(diǎn)：?可編程輸出電壓為36V??電壓參考誤差：±0.4％，典型值@25℃（TL431B）??低動(dòng)態(tài)輸出阻抗，典型0.22Ω???負(fù)載電流能力1.0mAto100mA??等效全范圍溫度系數(shù)50p
2、pm/℃典型??溫度補(bǔ)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
3、otherwisenoted.)最大額定值（環(huán)境溫度范圍適用，除非另有說明。）Rating參數(shù)Symbol符號(hào)數(shù)值Unit單位CathodetoAnodeVoltage陰極陽極電壓VKA37VCathodeCurrentRange,Continuous陰極電流范圍，連續(xù)IK–100to+150mAReferenceInputCurrentRange,Continuous參考輸入電流范圍，連續(xù)Iref–0.05to+10mAOperatingJunctionTemperature工作結(jié)溫TJ150℃Operat
4、ingAmbientTemperatureRange操作環(huán)境溫度范圍TL431I,TL431AI,TL431BITA–40to+85℃TL431C,TL431AC,TL431BC?0to+70StorageTemperatureRange儲(chǔ)存溫度范圍Tstg–65to+150℃TotalPowerDissipation總耗散功率常溫@TA=25℃Derateabove25℃AmbientTemperatureD,LP后綴塑封PD0.70WP后綴塑封1.10DM后綴塑封0.52TotalPowerDissipa
5、tion@TC=25℃Derateabove25℃CaseTemperature總耗散功率外殼溫度D,LP后綴塑封PD1.5WP后綴塑封3.0RECOMMENDEDOPERATINGCONDITIONS建議操作條件Condition條件Symbol符號(hào)Min最大值Max最小值Unit單位CathodetoAnodeVoltage陰極陽極電壓VKAVref36VCathodeCurrent陰極電流IK1.0100mA?THERMALCHARACTERISTICS熱特性Characteristic特性Symbol
6、符號(hào)D,LP后綴封裝?P后綴封裝?DM后綴封裝Unit單位ThermalResistance,Junction–to–Ambient熱阻，結(jié)點(diǎn)到環(huán)境RqJA178114240℃/WThermalResistance,Junction–to–Case熱阻，結(jié)到外殼RqJC8341–℃/WELECTRICALCHARACTERISTICS(TA=25℃,unlessotherwisenoted.)電氣特性（25℃，除非另有說明。）?Characteristic特性Symbol符號(hào)TL431ITL431CUnit單
7、位?最小值典型值最大值最小值典型值最大值ReferenceInputVoltage(Figure1)參考輸入電壓VKA=Vref,IK=10mA??TA=25℃Vref2.44?2.495?2.55?2.442.4952.55?VTA=TlowtoThigh(Note1)2.41–2.582.423–2.567ReferenceInputVoltageDeviationOverTemperatureRange參考輸入電壓偏差溫度范圍(Figure1,Notes1,2)VKA=Vref,IK=10mADVref
8、–7.030–3.017mVRatioofChangeinReferenceInputVoltagetoChangeinCathodetoAnodeVoltageIK=10mA(Figure2),△VKA=10VtoVref?△Vref△VKA–?–1.4–2.7?–?–1.4?–2.7mV/V△VKA=36Vto10V-–1.0–2.0––1.0–2.0ReferenceInputCurrent(
