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TL431LI Fiches technique(PDF) 6 Page - Texas Instruments

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No de pièce TL431LI
Description  Programmable Shunt Regulator with Optimized Reference Current
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TL431LI Fiches technique(HTML) 6 Page - Texas Instruments

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R2
R1
|z |
KA
(1 +
(
∆I
∆V
|z'| =
∆I
KA
∆V
KA
|z | =
KA
6
TL431LI
TL432LI
SLVSDQ6 – JULY 2018
www.ti.com
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
.
6.6 Electrical Characteristics, TL431LIBx, TL432LIBx
over recommended operating conditions, TA = 25°C (unless otherwise noted)
PARAMETER
TEST CIRCUIT
TEST CONDITIONS
TL431LIBx,
TL432LIBx
UNIT
MIN
TYP
MAX
Vref
Reference voltage
See Figure 15
VKA = Vref, IKA = 1 mA
2483
2495
2507
mV
VI(dev)
Deviation of reference input
voltage over full temperature
range(1)
See Figure 15
VKA = Vref,
IKA = 1 mA,
TL43xLIBC devices
3
12
mV
TL43xLIBI devices
4
34
TL43xLIBQ 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


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