TL431中文资料简介

TL431中文资料简介时间：2009-05-1521:48:30来源：资料室作者：编号:29994更新日期20130726003128介绍:TL431是一个有良好的热稳定性能的三端可调分流基准电压源。它的输出电压用两个电阻就可以任意地设置到从Vref（2.5V）到36V范围内的任何值。该器件的典型动态阻抗为0.2Ω，在很多应用中可以用它代替齐纳二极管，例如，数字电压表，运放电路、可调压电源，开关电源等等。特点：f．可编程输出电压为36V．电压参考误差：±0.4％，典型值@25℃（TL431B）．低动态输出阻抗，典型0.22Ω．负载电流能力1.0mAto100mA．等效全范围温度系数50ppm/℃典型．温度补偿操作全额定工作温度范围．低输出噪声电压图1TO92封装引脚图图28脚封装引脚功能图3SOP-8贴片封装引脚图图4TL431符号及内部方框图图5TL431内部电路图MAXIMUMRATINGS(Fulloperatingambienttemperaturerangeapplies,unlessotherwisenoted.)最大额定值（环境温度范围适用，除非另有说明。）Rating参数Symbol符号数值Unit单位CathodetoAnodeVoltage阴极阳极电压VKA37VCathodeCurrentRange,Continuous阴极电流范围，连续IK–100to+150mAReferenceInputCurrentRange,Continuous参考输入电流范围，连续Iref–0.05to+10mAOperatingJunctionTemperature工作结温TJ150℃OperatingAmbientTemperatureRange操作环境温度范围TL431I,TL431AI,TL431BITA–40to+85℃TL431C,TL431AC,TL431BC0to+70StorageTemperatureRange储存温度范围Tstg–65to+150℃TotalPowerDissipation总耗散功率常温@TA=25℃Derateabove25℃AmbientTemperatureD,LP后缀塑封PD0.70WP后缀塑封1.10DM后缀塑封0.52TotalPowerDissipation@TC=25℃Derateabove25℃CaseTemperature总耗散功率外壳温度D,LP后缀塑封PD1.5WP后缀塑封3.0RECOMMENDEDOPERATINGCONDITIONS建议操作条件Condition条件Symbol符号Min最大值Max最小值Unit单位CathodetoAnodeVoltage阴极阳极电压VKAVref36VCathodeCurrent阴极电流IK1.0100mATHERMALCHARACTERISTICS热特性Characteristic特性Symbol符号D,LP后缀封装P后缀封装DM后缀封装Unit单位ThermalResistance,Junction–to–Ambient热阻，结点到环境RqJA178114240℃/WThermalResistance,Junction–to–Case热阻，结到外壳RqJC8341–℃/WELECTRICALCHARACTERISTICS(TA=25℃,unlessotherwisenoted.)电气特性（25℃，除非另有说明。）Characteristic特性Symbol符号TL431ITL431CUnit单位最小值典型值最大值最小值典型值最大值ReferenceInputVoltage(Figure1)参考输入电压VKA=Vref,IK=10mATA=25℃Vref2.442.4952.552.442.4952.55VTA=TlowtoThigh(Note1)2.41–2.582.423–2.567ReferenceInputVoltageDeviationOverTemperatureRange参考输入电压偏差温度范围(Figure1,Notes1,2)VKA=Vref,IK=10mADVref–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(Figure2)参考输入电流IK=10mA,R1=10k,R2=∞TA=25℃Iref–1.84.0–1.84.0μATA=TlowtoThigh(Note1)––6.5––5.2ReferenceInputCurrentDIref–0.82.5–0.41.2μADeviationOverTemperatureRange参考输入电流偏差温度范围(Figure2,Note1,4)IK=10mA,R1=10k,R2=∞MinimumCathodeCurrentForRegulationVKA=Vref(Figure1)最小阴极电流调节Imin–0.51.0–0.51.0mAOff–StateCathodeCurrent(Figure3)VKA=36V,Vref=0V断态阴极电流Ioff–2601000–2601000nADynamicImpedance(Figure1,Note3)动态阻抗VKA=Vref,DIK=1.0mAto100mAf31.0kHz|ZKA|–0.220.5–0.220.5ΩELECTRICALCHARACTERISTICS(TA=25℃,unlessotherwisenoted.)电气特性（25℃，除非另有说明。）Characteristic特性Symbol符号TL431AITL431ACTL431BIUnit单位最小值典型值最大值最小值典型值最大值最小值典型值最大值ReferenceInputVoltage(Figure1)参考输入电压VKA=Vref,IK=10mATA=25℃Vref2.472.4952.522.472.4952.522.4832.4952.507VTA=TlowtoThigh2.44–2.552.453–2.5372.4752.4952.515ReferenceInputVoltageDeviationOverTemperatureRange(Figure1,Notes1,2)参考输入电压偏差温度范围VKA=Vref,IK=10mADVref–7.030–3.017–3.017mVRatioofChangeinReferenceInputVoltagetoChangeinCathodetoAnodeVoltageIK=10mA(Figure2),△VKA=10VtoVref△Vref△VKA––1.4–2.7––1.4–2.7––1.4–2.7mV/V△VKA=36Vto10V––1.0–2.0––1.0–2.0––1.0–2.0ReferenceInputCurrent(Figure2)参考输入电流TA=25℃Iref––1.84.0–1.84.0–1.12.0μATA=TlowtoThigh(Note–6.5––5.2––4.0IK=10mA,R1=10k,R2=∞1)ReferenceInputCurrentDeviationOverTemperatureRange(Figure2,Note1)IK=10mA,R1=10k,R2=∞参考输入电流偏差温度范围DIref–0.82.5–0.41.2–0.82.5μAMinimumCathodeCurrentForRegulation最小阴极电流调节VKA=Vref(Figure1)Imin–0.51.0–0.51.0–0.51.0mAOff–StateCathodeCurrent(Figure3)断态阴极电流VKA=36V,Vref=0VIoff–2601000–2601000–230500nADynamicImpedance(Figure1,Note3)VKA=Vref,DIK=1.0mAto100mAf31.0kHz动态阻抗|ZKA|–0.220.5–0.220.5–0.140.3Ω图6测试电路VKA=Vref图7测试电路VKAVref图8测试电路forIoff曲线图：图9阴极电流与阴极电压图10阴极电流与阴极电压图11参考输入电压与常温图12参考输入电流与常温图13变化的参考输入电压与阴极电压图14断态阴极电流随环境温度图15动态阻抗与频率图16动态阻抗随环境温度图17开环电压增益与频率图18谱噪声密度图19脉冲响应图20稳定的边界条件应用法：图21测试电路曲线a边界条件的稳定性图22曲线测试电路的B，C和D边界条件的稳定性图23并联稳压器电路图图24大电流并联稳压器电路图25控制三端固定稳压输出电路图26串联稳压调节电路图27过压保护电路图28恒流源电路图29恒定流入电流源电路图30双向可控硅过压保护电路图31电压监视器电路图32单电源比较温度补偿电路图33线性欧姆表电路图图34简单的400毫瓦唱机放大器电路图35高效率降压型开关转换器电路图图36简体TL431器件模型图37封装图图38SOP-8贴片封装图图39封装图