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TL431CD 데이터시트(PDF) 5 Page - STMicroelectronics |
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5 / 15 page TL431 Electrical characteristics 5/15 Reference input voltage deviation over temperature range ΔVref is defined as the difference between the maximum and minimum values obtained over the full temperature range. ΔVref = Vref max - Vref min Figure 4. Reference input voltage deviation over temperature range Table 4. Tamb = 25°C (unless otherwise specified) Symbol Parameter TL431I TL431AI Unit Min. Typ. Max. Min. Typ. Max. Vref Reference input voltage VKA = Vref , Ik = 10 mA, Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 2.44 2.41 2.495 2.55 2.58 2.47 2.44 2.495 2.52 2.55 V ΔVref Reference input voltage deviation over temperature range (1) VKA = Vref , Ik =10 mA, Tmin≤ Tamb≤ Tmax 730 7 30 mV Ratio of change in reference input voltage to change in cathode to anode voltage Ik = 10mA, ΔVKA = 10V to Vref ΔVKA = 36V to 10V -2.7 -2 -1.4 -1 -2.7 -2 -1.4 -1 mV/V Iref Reference input current Ik = 10mA, R1 = 10kΩ, R2 = ∞ Tamb = 25°C Tmin ≤ Tamb ≤Tmax 1.8 4 6.5 1.8 4 6.5 µA ΔIref Reference input current deviation over temperature range Ik = 10mA, R1 = 10kΩ, R2 = ∞ Tmin ≤ Tamb ≤ Tmax 0.8 2.5 0.8 1.2 µA Imin Minimum cathode current for regulation VKA = Vref 0.5 1 0.5 0.7 mA Ioff Off-state cathode current 2.6 1000 2.6 1000 nA ⏐ ZKA⏐ Dynamic impedance (2) VKA = Vref , Δ Ik = 1 to100mA, f ≤ 1kHZ 0.22 0.5 0.22 0.5 Ω 1. See definition of Reference input voltage deviation over temperature range below. 2. The dynamic impedance is defined as | ZKA| = ΔVref ΔVka ------------ ΔV KA I k Δ --------------- T1 T2 Temperature V ref max. V ref min. |
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