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TL431 数据表(PDF) 13 Page - Texas Instruments |
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TL431 数据表(HTML) 13 Page - Texas Instruments |
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13 / 41 page  TL431, TL431A, TL431B TL432, TL432A, TL432B ADJUSTABLE PRECISION SHUNT REGULATORS SLVS543H − AUGUST 2004 − REVISED JANUARY 2005 13 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS TL431AC TL432AC UNIT PARAMETER CIRCUIT TEST CONDITIONS MIN TYP MAX UNIT Vref Reference voltage 2 VKA = Vref, IKA = 10 mA 2470 2495 2520 mV VI(dev) Deviation of reference voltage over full temperature range 2 VKA = Vref, IKA = 10 mA, SOT23-3, SC-70, and TL432 devices 6 16 mV VI(dev) over full temperature range (see Figure 1) 2 IKA = 10 mA, TA = 0°C to 70°C All other devices 4 25 mV DV ref Ratio of change in reference voltage 3 IKA = 10 mA ∆VKA = 10 V − Vref −1.4 −2.7 mV DV ref DV KA Ratio of change in reference voltage to the change in cathode voltage 3 IKA = 10 mA ∆VKA = 36 V − 10 V −1 −2 mV V Iref Reference current 3 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ 2 4 µA II(dev) Deviation of reference current over full temperature range (see Figure 1) 3 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞, TA = 0°C to 70°C 0.8 1.2 µA Imin Minimum cathode current for regulation 2 VKA = Vref 0.4 0.6 mA Ioff Off-state cathode current 4 VKA = 36 V, Vref = 0 0.1 0.5 µA |zKA| Dynamic impedance (see Figure 1) 1 IKA = 1 mA to 100 mA, VKA = Vref, f ≤ 1 kHz 0.2 0.5 Ω electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS TL431AI TL432AI UNIT PARAMETER CIRCUIT TEST CONDITIONS MIN TYP MAX UNIT Vref Reference voltage 2 VKA = Vref, IKA = 10 mA 2470 2495 2520 mV VI(dev) Deviation of reference voltage over full temperature range 2 VKA = Vref, IKA = 10 mA, SOT23-3, SC-70, and TL432 devices 14 34 mV VI(dev) over full temperature range (see Figure 1) 2 IKA = 10 mA, TA = −40°C to 85°C All other packages 5 50 mV DV ref Ratio of change in reference voltage 3 IKA = 10 mA ∆VKA = 10 V − Vref −1.4 −2.7 mV DV ref DV KA Ratio of change in reference voltage to the change in cathode voltage 3 IKA = 10 mA ∆VKA = 36 V − 10 V −1 −2 mV V Iref Reference current 3 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ 2 4 µA II(dev) Deviation of reference current over full temperature range (see Figure 1) 3 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞, TA = −40°C to 85°C 0.8 2.5 µA Imin Minimum cathode current for regulation 2 VKA = Vref 0.4 0.7 mA Ioff Off-state cathode current 4 VKA = 36 V, Vref = 0 0.1 0.5 µA |zKA| Dynamic impedance (see Figure 1) 2 IKA = 1 mA to 100 mA, VKA = Vref, f ≤ 1 kHz 0.2 0.5 Ω |
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