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TL431CDBVT Datasheet(PDF) 8 Page - Texas Instruments |
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TL431CDBVT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 74 page R2 R1 |z | KA (1 + ( ∆I ∆V |z'| = ∆I KA ∆V KA |z | = KA (2) The dynamic impedance is defined as: When the device is operating with two external resistors (see Figure 21), the total dynamic impedance of the circuit is given by: which is approximately equal to . TL431, TL431A, TL431B TL432, TL432A, TL432B SLVS543O – AUGUST 2004 – REVISED JANUARY 2015 www.ti.com 7.8 Electrical Characteristics, TL431AC, TL432AC over recommended operating conditions, TA = 25°C (unless otherwise noted) TL431AC, TL432AC PARAMETER TEST CIRCUIT TEST CONDITIONS UNIT MIN TYP MAX Vref Reference voltage See Figure 20 VKA = Vref, IKA = 10 mA 2470 2495 2520 mV SOT23-3 and TL432 Deviation of reference input 6 16 VKA = Vref, devices VI(dev) voltage over full temperature See Figure 20 mV IKA = 10 mA range(1) All other devices 4 25 Ratio of change in reference ΔVKA = 10 V – Vref –1.4 –2.7 ΔVref / voltage to the change in See Figure 21 IKA = 10 mA mV/V ΔVKA ΔVKA = 36 V – 10 V –1 –2 cathode voltage Iref Reference input current See Figure 21 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ 2 4 µA Deviation of reference input II(dev) current over full temperature See Figure 21 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ 0.8 1.2 µA range(1) Minimum cathode current for Imin See Figure 20 VKA = Vref 0.4 0.6 mA regulation Ioff Off-state cathode current See Figure 22 VKA = 36 V, Vref = 0 0.1 0.5 µA |zKA| Dynamic impedance(2) See Figure 20 VKA = Vref, f ≤ 1 kHz, IKA = 1 mA to 100 mA 0.2 0.5 Ω (1) The deviation parameters Vref(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage αVref is defined as: αVref is positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the lower temperature. 8 Submit Documentation Feedback Copyright © 2004–2015, Texas Instruments Incorporated Product Folder Links: TL431 TL431A TL431B TL432 TL432A TL432B |
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