TL431中文资料简介TL431中文资料简介介绍: 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：?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1.0mA to 100mA ?等效全范围温度系数50 ppm/℃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1 TO92封装引脚图
hing at a time and All things in their being are g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ood for somethinhing at all things in their being ar 图2 8脚封装引脚功能
tim 图3 SOP-8 贴片封装引脚图
e and Ae good for somethin 图4 TL431符号及内部方框图
图5 TL431内部电路图
t a timMAXIMUM 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 数值
Unit hing ae and All things in their being are good for somethin符号
Cathode to Anode Voltage阴极阳极电压
Cathode Current Range, Continuous 阴极电流范围，连续
Reference Input Current Range, Continuous 参考输入电流范围，连续OperatingJunctionTemperature工作结温
TL431I,TL431AI, TL431BI Operating Ambient
Temperature Range 操作环境
TL431C, TL431AC, TL431BC温度范围
StorageTemperature Range储存温度范围Total Power Dissipation总D, LP后缀塑封耗散功率 常温@ TA = 25℃ Derate above 25℃ Ambient Temperature
DM 后缀塑封P后缀塑封
VKA IK Iref TJ
–100 to +150 –0.05 to +10
150
or0.701.10 0.521.5 3.0240 – d f36 100
–40 to +85
℃
0 to +70
℃
e g arooTA Tstg PD PD
Min最大值 Vref 1.0
P后缀封装 114 41 –65 to +150
Total Power Dissipation @ D, LP后缀塑封TC = 25℃ Derate above
25℃ Case Temperature 总耗P后缀塑封散功率 外壳温度
being thRECOMMENDED OPERATING CONDITIONS建议操作条件
eirCondition 条件
inSymbol 符号 VKA IK
Max最小值
gsCathode to Anode Voltage 阴极阳极电压Cathode Current 阴极电流
THERMAL CHARACTERISTICS热特性 All thinCharacteristic 特性 Symbol D, LP后缀封符号 装 RqJA RqJC 178 83 DM 后缀封装Thermal Resistance, Junction–to–Ambient 热阻，结点到环境Thermal Resistance, Junction–to–Case 热阻，结到外壳nde ahing at a timELECTRICAL CHARACTERISTICS(TA=25℃, unless otherwise noted.)电气特性（25℃ ，除非另有说明。）
somethin单位 V
37
mA mA ℃ W W Unit 单位 V mA Unit 单位 ℃/W ℃/WCharacteristic 特性
TL431I
Symbol 符号 最小值 典型值 最大值
2.44 2.495 2.55 Vref
TL431C
最小值
典型值 最大值
2.41–2.582.423 –
7.0 30
e gReference Input Voltage Deviation Over Temperature Range参考输入电
DVref –
压偏差温度范围 (Figure 1, Notes 1, 2) VKA= Vref, IK = 10 mA Ratio of Change △VKA = 10 V to in Reference Input Voltage to
Vref
–
–
oo3.0
17
mV
–1.4 –2.7
10 mA
ar–
(Figure 2),
Reference Input TA = 25℃Current (Figure
2) 参考输入电流TA = Tlow to IK = 10 mA, R1 = Thigh (Note 1)10k, R2 = ∞
Iref
eir–
be△Vref
Change in Cathode △VKA=36V to 10 △VKA
to Anode Voltage -VIK = 10 mA
ingd f–1.01.8 –0.4 0.5 260 0.22
Voltage (Figure
1)参考输入电压 TA = Tlow to VKA = Vref, IK = Thigh (Note 1)
or2.5674.0 5.2 1.2 1.0 1000 0.5
Reference Input TA = 25℃2.44 2.495
–1.4 –2.7
–1.0 –2.0–
1.8 4.0 –
th––6.5–
gsReference Input Current Deviation Over Temperature Range参考输入电
DIref –
流偏差温度范围 (Figure 2, Note 1, 4) IK = 10 mA, R1 = 10 k, R2 = ∞ Minimum Cathode Current For
Regulation VKA = Vref (Figure 1) Imin 最小阴极电流调节
Off–State Cathode Current
(Figure 3) VKA = 36 V, Vref = 0 V Ioff 断态阴极电流
–
in0.8 2.5 –
ll thin0.5 1.0 –
Ae aDynamic Impedance (Figure 1, Note 3)动态阻抗 VKA = Vref, DIK=1.0mA |ZKA| – to 100mA f 3 1.0kHz
nd– 260 1000 –
0.22 0.5 –
t a timELECTRICAL CHARACTERISTICS (TA = 25℃, unless otherwise noted.)电气特性（25℃，除非另有说明。）
Characteristic 特性
Symbol 符号
TL431AI
TL431AC
TL431BI
hing a somethinUnit 单位
2.55
V mV/V –2.0
μA μA mA nA Ω
Un单
TL431中文资料
