TL431中文资料说明介绍.doc

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1、|TL431中文资料简介时间：2009-05-15 21:48:30来源：资料室作者：编号:29994更新日期20130726 003128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0.2，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0.22负载电流能力1.0mA to 100mA等效全范围温度系数50 ppm/典型温

2、度补偿操作全额定工作温度范围低输出噪声电压 图1 TO92封装引脚图图2 8脚封装引脚功能图3 SOP-8 贴片封装引脚图图4 TL431符号及内部方框图 图5 TL431内部电路图MAXIMUM RATINGS (Full operating ambient temperature range applies, unlessotherwise noted.)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Cathode to Anode Voltage阴极阳极电压VKA37VCathode Current Range, Continuou

3、s 阴极电流范围，连续IK100 to +150mAReference Input Current Range, Continuous 参考输入电流范围，连续Iref0.05 to +10mAOperatingJunctionTemperature工作结温TJ150Operating Ambient Temperature Range 操作环境温度范围TL431I,TL431AI, TL431BITA40 to +85TL431C, TL431AC, TL431BC0 to +70StorageTemperature Range储存温度范围Tstg65 to +150Total Power D

4、issipation总耗散功率 常温 TA = 25 Derate above 25 Ambient TemperatureD, LP后缀塑封PD0.70WP后缀塑封1.10DM 后缀塑封0.52Total Power Dissipation TC = 25 Derate above 25 Case Temperature 总耗散功率 外壳温度D, LP后缀塑封PD1.5WP后缀塑封3.0RECOMMENDED OPERATING CONDITIONS建议操作条件Condition 条件Symbol 符号Min最大值Max最小值Unit 单位Cathode to Anode Voltage 阴

5、极阳极电压VKAVref36VCathode Current 阴极电流IK1.0100mATHERMAL CHARACTERISTICS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Thermal Resistance, JunctiontoAmbient 热阻，结点到环境RqJA178114240/WThermal Resistance, JunctiontoCase 热阻，结到外壳RqJC8341/WELECTRICAL CHARACTERISTICS(TA=25, unless otherwise noted.)电气特性

6、（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Reference Input Voltage (Figure 1)参考输入电压 VKA = Vref, IK = 10 mATA = 25Vref2.442.4952.552.442.4952.55VTA = Tlow to Thigh (Note 1)2.412.582.4232.567Reference Input Voltage Deviation Over Temperature Range参考输入电压偏差温度范围 (Figure 1

7、, Notes 1, 2) VKA= Vref, IK = 10 mADVref7.0303.017mVRatio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage IK = 10 mA (Figure 2),VKA = 10 V to VrefVrefVKA1.42.71.42.7mV/VVKA=36V to 10 V-1.02.01.02.0Reference Input Current (Figure 2) 参考输入电流IK = 10 mA, R1 = 10k, R2 = TA = 25I

8、ref1.84.01.84.0ATA = Tlow to Thigh (Note 1)6.55.2Reference Input Current Deviation Over Temperature Range参考输入电流偏差温度范围 (Figure 2, Note 1, 4) IK = 10 mA, R1 = 10 k, R2 = DIref0.82.50.41.2AMinimum Cathode Current For Regulation VKA = Vref (Figure 1) 最小阴极电流调节Imin0.51.00.51.0mAOffState Cathode Current (F

9、igure 3) VKA = 36 V, Vref = 0 V 断态阴极电流Ioff26010002601000nADynamic Impedance (Figure 1, Note 3)动态阻抗 VKA = Vref, DIK=1.0mA to 100mA f 3 1.0kHz|ZKA|0.220.50.220.5ELECTRICAL CHARACTERISTICS (TA = 25, unless otherwise noted.)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

10、小值典型值最大值最小值典型值最大值Reference Input Voltage (Figure 1)参考输入电压 VKA = Vref, IK = 10 mATA = 25Vref2.472.4952.522.472.4952.522.4832.4952.507VTA = Tlow to Thigh2.442.552.4532.5372.4752.4952.515Reference Input Voltage Deviation Over Temperature Range (Figure 1, Notes 1, 2) 参考输入电压偏差温度范围VKA= Vref, IK = 10 mADVr

11、ef7.0303.0173.017mVRatio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage IK = 10 mA (Figure 2),VKA = 10 V to VrefVrefVKA1.42.71.42.71.42.7mV/VVKA = 36 V to 10 V1.02.01.02.01.02.0Reference Input Current (Figure 2)参考输入电流 IK = 10 mA, R1 = 10 k, R2 = TA = 25Iref 1.84.01.84.01.

12、12.0ATA = Tlow to Thigh (Note 1)6.55.24.0Reference Input Current Deviation Over Temperature Range (Figure 2, Note 1) IK = 10 mA, R1 = 10k, R2 = 参考输入电流偏差温度范围DIref0.82.50.41.20.82.5AMinimum Cathode Current For Regulation 最小阴极电流调节VKA = Vref (Figure 1)Imin0.51.00.51.00.51.0mAOffState Cathode Current(Fig

13、ure 3) 断态阴极电流VKA = 36V, Vref =0VIoff26010002601000230500nADynamic Impedance (Figure 1, Note 3) VKA = Vref, DIK = 1.0 mA to 100 mA f 3 1.0 kHz 动态阻抗|ZKA|0.220.50.220.50.140.3图6 测试电路VKA = Vref 图7 测试电路VKA Vref图8 测试电路for Ioff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

14、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38 SOP-8 贴片封装图图39封装图