TL431中文资料简介

TL431中文资料简介介绍:TL431是一个有优秀的热稳固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能够随意地设置到从Vref〔2.5V〕到36V范围内的任何值。该器件的典型动向阻抗为

0.2Ω，在好多应用中能够用它取代齐纳二极管，比如，数字电压表，运放电路、可调压电源，开关电源等等。特色：?可编程输出电压为

36V?电压参照偏差：±

0.4％

，典型值@25℃〔

TL431B〕?低动向输出阻抗，典型

0.22Ω?负载电流才能

1.0mAto100mA?等效全范围温度系数50ppm/℃典型温度赔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,unless最大额定值〔环境温度范围合用，除非还有说明。otherwisenoted.)

〕Rating

参数

Symbol

数值

Unit符号单位CathodetoAnodeVoltage阴极阳极电压VKA37VCathodeCurrentRange,Continuous阴极电流范围，连续IK–100to+150mAReferenceInputCurrentRange,Continuous参照输入电流范围，连续Iref–0.05to+10mAOperatingJunctionTemperature工作结温TJ150℃OperatingAmbientTL431I,TL431AI,TL431BI–40to+85TemperatureRange操作环境TA℃温度范围TL431C,TL431AC,TL431BC0to+70StorageTemperatureRange储藏温度范围Tstg–65to+150℃TotalPowerDissipation总D,LP后缀塑封耗散功率常温@TA=25℃P后缀塑封PD1.10WDerateabove25℃AmbientTemperatureDM后缀塑封TotalPowerDissipation@TCD,LP后缀塑封1.5=25℃Derateabove25℃PDWCaseTemperature总耗散功P后缀塑封率外壳温度RECOMMENDEDOPERATINGCONDITIONS建议操作条件Condition条件SymbolMin最大值Max最小值Unit符号单位CathodetoAnodeVoltage阴极阳极电压VKAVref36VCathodeCurrent阴极电流IK1.0100mATHERMALCHARACTERISTICS热特征SymbolD,LP后缀封DM后缀封装UnitCharacteristic特征装P后缀封装单位符号ThermalResistance,Junction–to–Ambient热阻，结点到环RqJA178114240℃/W境ThermalResistance,8341–℃/WRqJCJunction–to–Case热阻，结到外壳ELECTRICALCHARACTERISTICS(TA=25℃,unlessotherwisenoted.)电气特征〔25℃，除非另有说明。〕CharacteristicReferenceInputVoltage(Figure参照输入电压VKA=Vref,IK=10mA

SymbolTL431ITL431C特征最小符号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单位VReferenceInputVoltageDeviationOverTemperatureRange参照输入电–7.030–3.017压倾向温度范围(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)参照输入电流TA=TlowtoIref––––5.2IK=10mA,R1=Thigh(Note1)10k,R2=∞ReferenceInputCurrentDeviationOverTemperatureRange参照输入电–0.82.5–0.41.2流倾向温度范围(Figure2,Note1,DIref4)IK=10mA,R1=10k,R2=∞MinimumCathodeCurrentForRegulationVKA=Vref(Figure1)最Imin–0.51.0–0.51.0小阴极电流调理Off–StateCathodeCurrent(Figure3)VKA=36V,Vref=0V断态阴Ioff–2601000–2601000极电流DynamicImpedance(Figure1,Note3)动向阻抗VKA=Vref,DIK=1.0mA|ZKA|–0.220.5–0.220.5to100mAf31.0kHzELECTRICALCHARACTERISTICS(TA=℃25,unlessotherwisenoted.)电气特征〔25℃，除非还有说明。〕

mVmV/VAAmAnAΩTA=TlowtoThigh(Note1)VKA=Vref,△VKA=10VtoVref△VKA=36Vto10VTA=25℃参照输入电Characteristic特征ReferenceTA=25℃InputVoltage(Figure1)参TA=Tlowto考输入电压ThighVKA=Vref,IK=10mAReferenceInputVoltageDeviationOverTemperatureRange(Figure1,Notes1,2)压倾向温度范围IK=10mARatioofChangeinReferenceInputVoltagetoChangeinCathodetoAnodeVoltageIK=mA(Figure2),ReferenceInputCurrent(Figure2)参照输入电流IK=10mA,R1=10k,R2=∞ReferenceInputCurrentDeviationOverTemperatureRange(Figure2,Note1)IK=10mA,R110k,R2=∞参照输入电流倾向温度范围MinimumCathodeCurrentForRegulation最小阴极电流调理VKA=Vref(Figure1)

SymbolTL431AITL431ACTL431BIU最大符号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)断态阴Ioff–2601000–2601000–230500nA极电流VKA=36V,Vref=0VDynamicImpedance(Figure1,Note3)VKA=Vref,DIK–0.220.5–0.220.5–0.140.3Ω|ZKA|1.0mAto100mAf31.0kHz动向阻抗图

6

测试电路VKA=Vref

图7

测试电路

VKA>Vref

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11参照输入电压与常温图12参照输入电流与常温图13变化的参照输入电压与阴极电压图14断态阴极电流随环境温度图15动向阻抗与频率图16动向阻抗随环境温度图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稳固的界限条件应用法：图21测试电路曲线a界限条件的稳固性图22曲线测试电路的B，C和D界限条件的稳固性图23并联稳压器电路图图24大电流并联稳压