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TL1431CLPRE3 bảng dữ liệu(PDF) 4 Page - Texas Instruments

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TL1431CLPRE3 bảng dữ liệu(HTML) 4 Page - Texas Instruments

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∆I
∆V
|z'| =
R2
R1
|z |
KA
(1 +
(
∆I
KA
∆V
KA
|z | =
KA
where:
∆TA is the rated operating temperature range of the device.
Max VI(ref)
Min VI(ref)
˙TA
VI(dev)
α
VI(ref)
ppm
°C
V
I(dev)
V
I(ref)
at 25
°C
× 10
6
T
A
(
( =
(
(
∆V
KA
∆V
I(ref)
(3)
The output impedance is defined as:
, which is approximately equal to
.
TL1431
SLVS062M – DECEMBER 1991 – REVISED APRIL 2012
www.ti.com
Recommended Operating Conditions
MIN
MAX
UNIT
VKA
Cathode voltage
VI(ref)
36
V
IKA
Cathode current
1
100
mA
TL1431C
0
70
TA
Operating free-air temperature
TL1431Q
–40
125
°C
TL1431M
–55
125
Electrical Characteristics
at specified free-air temperature, IKA = 10 mA (unless otherwise noted)
TL1431C
TEST
PARAMETER
TEST CONDITIONS
TA
(1)
UNIT
CIRCUIT
MIN
TYP
MAX
25°C
2490
2500
2510
VI(ref)
Reference input voltage
VKA = VI(ref)
Figure 1
mV
Full range
2480
2520
Deviation of reference input
VI(dev)
voltage over full temperature
VKA = VI(ref)
Full range
Figure 1
4
20
mV
range(2)
Ratio of change in reference
input voltage to the change in
ΔVKA = 3 V to 36 V
Full range
Figure 2
–1.1
–2
mV/V
cathode voltage
25°C
1.5
2.5
II(ref)
Reference input current
R1 = 10 k
Ω, R2 = ∞
Figure 2
μA
Full range
3
Deviation of reference input
II(dev)
current over full temperature
R1 = 10 k
Ω, R2 = ∞
Full range
Figure 2
0.2
1.2
μA
range(2)
Minimum cathode current for
Imin
VKA = VI(ref)
25°C
Figure 1
0.45
1
mA
regulation
25°C
0.18
0.5
Ioff
Off-state cathode current
VKA = 36 V, VI(ref) = 0
Figure 3
μA
Full range
2
VKA = VI(ref), f ≤ 1 kHz,
|zKA|
Output impedance(3)
25°C
Figure 1
0.2
0.4
IKA = 1 mA to 100 mA
(1)
Full range is 0°C to 70°C for C-suffix devices.
(2)
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
αVI(ref) is defined as:
αVI(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature.
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:
4
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Product Folder Links: TL1431


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