Characteristic 特性 TA = 25℃ Symbol TL431AI TL431AC TL431BI Un最大单符号 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2.47 2.495 2.52 2.47 2.495 2.52 2.483 2.495 2.507 Reference Input Voltage (Figure 1)参TA = Tlow to Vref 考输入电压 Thigh VKA = Vref, IK = 10 mA Reference Input Voltage Deviation Over 2.44 – 2.55 2.453 – V 2.537 2.475 2.495 2.515 Temperature Range (Figure DVref – 1, Notes 1, 2) 参考输入电压偏差温度范围VKA= Vref, IK = 10 mA Ratio of Change in Reference Input Voltage to Change in Cathode to Anode △Vref △VKA △VKA = 36 V to 10 V – △VKA = 10 V to Vref 7.0 30 – 3.0 17 – 3.0 17 mV– –1.4 – 2.7 – –1.4 – 2.7 – –1.4 – 2.7 mV–1.0 –2.0 – –1.0 –2.0 – –1.0 –2.0 Voltage IK = 10 mA (Figure 2), Reference Input Current (Figure 2)参考TA = Tlow 输入电流 IK = to Thigh 10 mA, R1 = 10 (Note 1) k, R2 = ∞ Reference Input Current Deviation Over Temperature Range (Figure DIref – 2, Note 1) IK = 10 mA, R1 = 10k, R2 = ∞ 参考输入电流偏差温度范围 Minimum Cathode Current For Regulation 最小阴极电流调节VKA = Vref (Figure 1) Imin – 0.5 1.0 – 0.5 1.0 – 0.5 0.8 2.5 – 0.4 1.2 – 0.8 TA = 25℃ Iref – – 1.8 4.0 – 1.8 4.0 – 1.1 2.0 – 6.5 – – 5.2 – – 4.0 μ2.5 μ1.0 mAOff–State Cathode Current(Figure 3) 断态阴Ioff 极电流VKA = 36V, Vref =0V Dynamic Impedance (Figure 1, Note 3) VKA = Vref, DIK |ZKA| – = 1.0 mA to 100 mA f 3 1.0 kHz 动态阻抗 0.22 0.5 – 0.22 0.5 – – 260 1000 – 260 1000 – 230 500 nA0.14 0.3 Ω 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