參數(shù)資料
型號： TL432AQDCKT
廠商： Texas Instruments, Inc.
英文描述： ADJUSTABLE PRECISION SHUNT REGULATORS
中文描述： 可調(diào)節(jié)精密并聯(lián)穩(wěn)壓器
文件頁數(shù)： 11/41頁
文件大?。?/td> 763K
代理商： TL432AQDCKT
SLVS543H AUGUST 2004 REVISED JANUARY 2005
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions, T
A
= 25
°
C (unless otherwise
noted)
PARAMETER
TEST
CIRCUIT
TEST CONDITIONS
TL431C
TL432C
UNIT
MIN
TYP
MAX
Vref
Reference voltage
2
VKA = Vref,
IKA = 10 mA
SOT23-3 and TL432
devices
2440
2495
2550
mV
VI(dev)
Deviation of reference voltage
over full temperature range
(see Figure 1)
2
VKA = Vref,
IKA = 10 mA,
TA = 0
°
C to 70
°
C
6
16
mV
All other devices
VKA = 10 V Vref
VKA = 36 V 10 V
4
25
V
ref
V
KA
Iref
Ratio of change in reference voltage
to the change in cathode voltage
3
IKA = 10 mA
1.4
2.7
mV
V
μ
A
1
2
Reference current
3
IKA = 10 mA, R1 = 10 k
, R2 =
∞
2
4
II(dev)
Deviation of reference current
over full temperature range
(see Figure 1)
3
IKA = 10 mA, R1 = 10 k
, R2 =
∞
,
TA = 0
°
C to 70
°
C
0.4
1.2
μ
A
Imin
Minimum cathode current
for regulation
2
VKA = Vref
0.4
1
mA
Ioff
Off-state cathode current
4
VKA = 36 V,
IKA = 1 mA to 100 mA, VKA = Vref,
f
≤
1 kHz
Vref = 0
0.1
1
μ
A
|zKA|
Dynamic impedance (see Figure 1)
1
0.2
0.5
The deviation parameters V
ref(dev)
and I
ref(dev)
are defined as the differences between the maximum and minimum
values obtained over the recommended temperature range. The average full-range temperature coefficient of the
reference voltage,
α
Vref
, is defined as:
Maximum Vref
VI(dev)
Vrefat 25
°
C
T
A
where:
T
A
is the recommended operating free-air temperature range of the device.
can be positive or negative, depending on whether minimum V
ref
or maximum V
ref
, respectively, occurs at the
lower temperature.
Example: maximum V
ref
= 2496 mV at 30
°
C, minimum V
ref
= 2492 mV at 0
°
C, V
ref
= 2495 mV at 25
°
C,
T
A
= 70
°
C for TL431C
Because minimum V
ref
occurs at the lower temperature, the coefficient is positive.
Calculating Dynamic Impedance
|z
KA
|
The dynamic impedance is defined as:
When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit
is given by:
|z |
I
R2
Minimum Vref
TA
VI(dev)
Vref
ppm
°
C
10
6
Vref
4 mV
2495 mV
10
6
70
°
C
23 ppm
°
C
V
KA
I
KA
V
|z
KA
| 1
R1
Figure 1. Calculating Deviation Parameters and Dynamic Impedance
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