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TL431LI Fiches technique(PDF) 5 Page - Texas Instruments |
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TL431LI Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 32 page R2 R1 |z | KA (1 + ( ∆I ∆V |z'| = ∆I KA ∆V KA |z | = KA 5 TL431LI TL432LI www.ti.com SLVSDQ6 – JULY 2018 Product Folder Links: TL431LI TL432LI Submit Documentation Feedback Copyright © 2018, Texas Instruments Incorporated (1) The deviation parameters Vi(dev) and Ii(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. (2) The dynamic impedance is defined as: When the device is operating with two external resistors (see Figure 16), the total dynamic impedance of the circuit is given by: which is approximately equal to . 6.5 Electrical Characteristics, TL431LIAx, TL432LIAx over recommended operating conditions, TA = 25°C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS TL431LIAx, TL432LIAx UNIT MIN TYP MAX Vref Reference voltage See Figure 15 VKA = Vref, IKA = 1 mA 2470 2495 2520 mV VI(dev) Deviation of reference input voltage over full temperature range(1) See Figure 15 VKA = Vref, IKA = 1 mA, TL43xLIAC devices 3 12 mV TL43xLIAI devices 4 34 TL43xLIAQ devices 6 34 ΔVref / ΔVKA Ratio of change in reference voltage to the change in cathode voltage See Figure 16 IKA = 1 mA ΔVKA = 10 V – Vref –1.4 –2.7 mV/V ΔVKA = 36 V – 10 V –1 –2 Iref Reference input current See Figure 16 IKA = 1 mA, R1 = 10 kΩ, R2 = ∞ 0.4 0.8 µA II(dev) Deviation of reference input current over full temperature range(1) See Figure 16 IKA = 1 mA, R1 = 10 kΩ, R2 = ∞ 0.2 0.4 µA Imin Minimum cathode current for regulation See Figure 15 VKA = Vref 0.4 1 mA Ioff Off-state cathode current See Figure 17 VKA = 36 V, Vref = 0 0.1 1 µA |zKA| Dynamic impedance(2) See Figure 15 VKA = Vref, IKA = 1 mA to 15 mA 0.3 0.75 Ω |
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Description similaire - TL431LI |
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