概述
规格参数
数据手册
替代型号TL431ACP 概述
ADJUSTABLE PRECISION SHUNT REGULATORS 可调式精密并联稳压器 电压基准芯片 参考电压源
TL431ACP 规格参数
| 是否无铅： | 不含铅 | 是否Rohs认证： | 符合 |
| 生命周期： | Active | 零件包装代码： | DIP |
| 包装说明： | DIP, DIP8,.3 | 针数： | 8 |
| Reach Compliance Code： | compliant | ECCN代码： | EAR99 |
| HTS代码： | 8542.39.00.01 | Factory Lead Time： | 1 week |
| 风险等级： | 0.63 | 其他特性： | OUTPUT VOLTAGE ADJUSTABLE FROM 2.495V TO 36V |
| 模拟集成电路 - 其他类型： | THREE TERMINAL VOLTAGE REFERENCE | JESD-30 代码： | R-PDIP-T8 |
| JESD-609代码： | e4 | 长度： | 9.81 mm |
| 湿度敏感等级： | 1 | 功能数量： | 1 |
| 输出次数： | 1 | 端子数量： | 8 |
| 最高工作温度： | 70 °C | 最低工作温度： | |
| 最大输出电流： | 0.1 A | 最大输出电压： | 2.52 V |
| 最小输出电压： | 2.47 V | 标称输出电压： | 2.495 V |
| 封装主体材料： | PLASTIC/EPOXY | 封装代码： | DIP |
| 封装等效代码： | DIP8,.3 | 封装形状： | RECTANGULAR |
| 封装形式： | IN-LINE | 峰值回流温度（摄氏度）： | 260 |
| 认证状态： | Not Qualified | 座面最大高度： | 5.08 mm |
| 子类别： | Voltage References | 最大供电电流 (Isup)： | 100 mA |
| 最大供电电压 (Vsup)： | 36 V | 最小供电电压 (Vsup)： | 2.495 V |
| 表面贴装： | NO | 技术： | BIPOLAR |
| 最大电压温度系数： | 92 ppm/°C | 温度等级： | COMMERCIAL |
| 端子面层： | Nickel/Palladium/Gold (Ni/Pd/Au) | 端子形式： | THROUGH-HOLE |
| 端子节距： | 2.54 mm | 端子位置： | DUAL |
| 处于峰值回流温度下的最长时间： | NOT SPECIFIED | 微调/可调输出： | YES |
| 最大电压容差： | 1% | 宽度： | 7.62 mm |
| Base Number Matches： | 1 |
TL431ACP 数据手册
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PDF下载TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
D PACKAGE
(TOP VIEW)
Equivalent Full-Range Temperature
Coefficient . . . 30 ppm/°C
0.2-Ω Typical Output Impedance
Sink-Current Capability . . . 1 mA to 100 mA
Low Output Noise
CATHODE
ANODE
ANODE
NC
REF
1
2
3
4
8
7
6
5
ANODE
ANODE
NC
Adjustable Output Voltage . . . V to 36 V
ref
Available in a Wide Range of High-Density
Packages
P OR PW PACKAGE
(TOP VIEW)
description
CATHODE
NC
REF
NC
1
2
3
4
8
7
6
5
The TL431 and TL431A are three-terminal
adjustable shunt regulators with specified thermal
stability over applicable automotive, commercial,
and military temperature ranges. The output
NC
ANODE
NC
NC
voltage can be set to any value between V
ref
NC – No internal connection
(approximately 2.5 V) and 36 V with two external
resistors (see Figure 17). These devices have a
typical output impedance of 0.2 Ω. Active output
PK PACKAGE
(TOP VIEW)
circuitry provides
a
very sharp turn-on
characteristic, making these devices excellent
replacements for Zener diodes in many
applications, such as onboard regulation,
adjustable power supplies, and switching power
supplies.
REF ANODE CATHODE
The TL431C and TL431AC are characterized for
operation from 0°C to 70°C, and the TL431I and
TL431AI are characterized for operation from
–40°C to 85°C.
LP PACKAGE
(TOP VIEW)
CATHODE
ANODE
REF
KTP PACKAGE
(TOP VIEW)
CATHODE
ANODE
REF
ANODE
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP
FORM
(Y)
PLASTIC
FLANGE
MOUNT
(KTP)
SHRINK
SMALL
OUTLINE
(PW)
SMALL
OUTLINE
(D)
PLASTIC
T
A
TO-226AA
(LP)
SOT-89
(PK)
DIP
(P)
TL431CD
TL431ACD
TL431CLP
TL431ACLP
TL431CP
TL431ACP
0°C to 70°C
TL431CKTPR
TL431CPK
TL431IPK
TL431CPW
TL431Y
TL431ID
TL431AID
TL431ILP
TL431AILP
TL431IP
TL431AIP
–40°C to 85°C
The D and LP packages are available taped and reeled. The KTP and PK packages are only available taped and reeled. Add
the suffix R to device type (e.g., TL431CDR). Chip forms are tested at T = 25°C.
A
symbol
REF
ANODE
CATHODE
functional block diagram
CATHODE
+
_
REF
V
ref
ANODE
†
equivalent schematic
CATHODE
800 Ω
800 Ω
20 pF
REF
150 Ω
3.28 kΩ
4 kΩ
10 kΩ
20 pF
2.4 kΩ
7.2 kΩ
1 kΩ
800 Ω
ANODE
†
All component values are nominal.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Cathode voltage, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 V
KA
Continuous cathode current range, I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –100 mA to 150 mA
KA
Reference input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 µA to 10 mA
Package thermal impedance, θ (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
JA
LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 156°C/W
KTP package . . . . . . . . . . . . . . . . . . . . . . . . . 28°C/W
P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127°C/W
PK package . . . . . . . . . . . . . . . . . . . . . . . . . . . 52°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D, P, or PW package . . . . . . . . . . . . 260°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: LP or PK package . . . . . . . . . . . . . . 300°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Voltage values are with respect to the anode terminal unless otherwise noted.
2. Maximum power dissipation is a function of T (max), θ , and T . The maximum allowable power dissipation at any allowable
J
JA
A
ambient temperature is P = (T (max) – T )/θ . Operating at the absolute maximum T of 150°C can impact reliability.
D
J
A
JA
J
3. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
recommended operating conditions
MIN
MAX
36
UNIT
V
Cathode voltage, V
KA
V
ref
Cathode current, I
KA
1
0
100
70
mA
TL431C, TL431AC
TL431I, TL431AI
Operating free-air temperature range, T
°C
A
–40
85
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
electrical characteristics over recommended operating conditions, T = 25°C (unless otherwise
A
noted)
TL431C
TYP
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
= 10 mA
UNIT
MIN
MAX
V
ref
Reference voltage
2
V
V
T
A
= V
= V
,
I
KA
2440
2495
2550
mV
KA
ref
Deviation of reference voltage
over full temperature range
(see Figure 1)
I
= 10 mA,
KA
ref, KA
V
I(dev)
2
4
25
mV
†
= full range
∆V
= 10 V – V
ref
–1.4
–1
2
–2.7
–2
4
Vref
VKA
Ratio of change in reference voltage
to the change in cathode voltage
KA
mV
V
3
3
I
= 10 mA
KA
∆V
KA
= 36 V – 10 V
I
I
Reference current
I
I
= 10 mA, R1 = 10 kΩ, R2 = ∞
µA
ref
KA
Deviation of reference current
over full temperature range
(see Figure 1)
= 10 mA, R1 = 10 kΩ, R2 = ∞,
KA
3
0.4
1.2
µA
I(dev)
†
= full range
T
A
Minimum cathode current
for regulation
I
I
2
4
1
V
V
= V
ref
0.4
0.1
0.2
1
1
mA
µA
Ω
min
KA
Off-state cathode current
= 36 V,
V
= 0
off
KA
ref
I
= 1 mA to 100 mA, V
= V ,
ref
KA
f ≤ 1 kHz
KA
|z
|
Dynamic impedance (see Figure 1)
0.5
KA
†
Full range is 0°C to 70°C for the TL431C.
The deviation parameters V
and I
are defined as the differences between the maximum and minimum
ref(dev)
ref(dev)
values obtained over the recommended temperature range. The average full-range temperature coefficient of the
reference voltage, α
, is defined as:
Vref
Maximum V
ref
ref
VI(dev
)
6
10
V
I(dev)
V
at 25°C
ref
ppm
Minimum V
Vref
°C
T
A
∆T
A
where:
∆T is the recommended operating free-air temperature range of the device.
A
α
can be positive or negative, depending on whether minimum V or maximum V , respectively, occurs at the
ref ref
Vref
lower temperature.
Example: maximum V = 2496 mV at 30°C, minimum V = 2492 mV at 0°C, V = 2495 mV at 25°C,
ref
ref
ref
∆T = 70°C for TL431C
A
4 mV
2495 mV
6
10
23 ppm °C
Vref
70°C
Because minimum V occurs at the lower temperature, the coefficient is positive.
ref
Calculating Dynamic Impedance
V
KA
z
The dynamic impedance is defined as:
KA
I
KA
When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit
is given by:
V
I
R1
R2
| |
z
z
1
KA
Figure 1. Calculating Deviation Parameters and Dynamic Impedance
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
electrical characteristics over recommended operating conditions, T = 25°C (unless otherwise
A
noted)
TL431I
TYP
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
= 10 mA
UNIT
MIN
MAX
V
ref
Reference voltage
2
V
V
T
A
= V
= V
,
I
KA
2440
2495
2550
mV
KA
ref
Deviation of reference voltage
over full temperature range
(see Figure 1)
I
= 10 mA,
KA
ref, KA
V
I(dev)
2
5
50
mV
†
= full range
∆V
= 10 V – V
ref
–1.4
–1
2
–2.7
–2
4
Vref
VKA
Ratio of change in reference voltage
to the change in cathode voltage
KA
mV
V
3
3
I
= 10 mA
KA
∆V
KA
= 36 V – 10 V
I
I
Reference current
I
I
= 10 mA, R1 = 10 kΩ, R2 = ∞
µA
ref
KA
Deviation of reference current
over full temperature range
(see Figure 1)
= 10 mA, R1 = 10 kΩ, R2 = ∞,
KA
3
0.8
2.5
µA
I(dev)
†
= full range
T
A
Minimum cathode current for
regulation
I
I
2
4
2
V
V
= V
ref
0.4
0.1
0.2
1
1
mA
µA
Ω
min
KA
Off-state cathode current
= 36 V,
V
= 0
off
KA
ref
I
= 1 mA to 100 mA, V
= V ,
ref
KA
f ≤ 1 kHz
KA
|z
|
Dynamic impedance (see Figure 1)
0.5
KA
†
Full range is –40°C to 85°C for the TL431I.
electrical characteristics over recommended operating conditions, T = 25°C (unless otherwise
A
noted)
TL431AC
TYP
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
= 10 mA
UNIT
MIN
MAX
V
ref
Reference voltage
2
V
V
T
A
= V
= V
,
I
KA
2470
2495
2520
mV
KA
ref
Deviation of reference voltage
over full temperature range
(see Figure 1)
I
= 10 mA,
KA
ref, KA
V
I(dev)
2
4
25
mV
†
= full range
∆V
= 10 V – V
ref
–1.4
–1
2
–2.7
–2
4
Vref
VKA
Ratio of change in reference voltage
to the change in cathode voltage
KA
mV
V
3
3
I
= 10 mA
KA
∆V
KA
= 36 V – 10 V
I
I
Reference current
I
I
= 10 mA, R1 = 10 kΩ, R2 = ∞
µA
ref
KA
Deviation of reference current
over full temperature range
(see Figure 1)
= 10 mA, R1 = 10 kΩ, R2 = ∞,
KA
3
0.8
1.2
µA
I(dev)
‡
= full range
T
A
Minimum cathode current
for regulation
I
I
2
4
1
V
V
= V
ref
0.4
0.1
0.2
0.6
0.5
0.5
mA
µA
Ω
min
KA
Off-state cathode current
= 36 V,
V
= 0
off
KA
ref
I
= 1 mA to 100 mA, V
= V ,
ref
KA
f ≤ 1 kHz
KA
|z
|
Dynamic impedance (see Figure 1)
KA
‡
Full range is 0°C to 70°C for the TL431AC.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
electrical characteristics over recommended operating conditions, T = 25°C (unless otherwise
A
noted)
TL431AI
TYP
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
V
Reference voltage
2
V
V
T
A
= V
= V
,
I
= 10 mA
2470
2495
2520
mV
ref
KA
ref
KA
Deviation of reference voltage
over full temperature range
(see Figure 1)
I
= 10 mA,
KA
ref, KA
V
I(dev)
2
5
50
mV
†
= full range
∆V
∆V
= 10 V – V
ref
–1.4
–1
2
–2.7
–2
4
Ratio of change in reference voltage
to the change in cathode voltage
KA
Vref
VKA
mV
V
3
3
I
= 10 mA
KA
= 36 V – 10 V
KA
I
I
Reference current
I
I
= 10 mA, R1 = 10 kΩ, R2 = ∞
µA
ref
KA
Deviation of reference current
over full temperature range
(see Figure 1)
= 10 mA, R1 = 10 kΩ, R2 = ∞,
KA
3
0.8
2.5
µA
I(dev)
†
= full range
T
A
Minimum cathode current
for regulation
I
I
2
4
2
V
V
= V
ref
0.4
0.1
0.2
0.7
0.5
0.5
mA
µA
Ω
min
KA
Off-state cathode current
= 36 V,
V
= 0
off
KA
ref
I
= 1 mA to 100 mA, V
= V ,
ref
KA
f ≤ 1 kHz
KA
|z
|
Dynamic impedance (see Figure 1)
KA
†
Full range is –40°C to 85°C for the TL431AI.
electrical characteristics over recommended operating conditions, T = 25°C (unless otherwise
A
noted)
TL431Y
TYP
2495
–1.4
–1
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
UNIT
MIN
MAX
V
Reference voltage
2
3
V
= V
,
I = 10 mA
KA
mV
ref
KA
ref
∆V
= 10 V – V
ref
Vref
VKA
Ratio of change in reference voltage
to the change in cathode voltage
KA
KA
mV
V
I
I
= 10 mA
KA
KA
∆V
= 36 V – 10 V
I
I
I
Reference input current
3
2
4
2
= 10 mA, R1 = 10 kΩ, R2 = ∞
2
µA
mA
µA
Ω
ref
Minimum cathode current
for regulation
V
KA
= V
ref
0.4
0.1
0.2
min
off
Off-state cathode current
V
KA
= 36 V,
V
ref
= 0
I
= 1 mA to 100 mA, V
= V ,
ref
KA
f ≤ 1 kHz
KA
‡
Dynamic impedance
|z
|
KA
‡
Calculating dynamic impedance:
VKA
IKA
The dynamic impedance is defined as:
zKA
When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit is given by:
∆V
∆I
R1
R2
|z |
|zKA| 1
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
PARAMETER MEASUREMENT INFORMATION
Input
V
KA
I
KA
V
ref
Figure 2. Test Circuit for V
= V
KA
ref
Input
V
KA
I
KA
R1
R2
I
ref
V
ref
R1
R2
VKA
Vref
1
Iref R1
Figure 3. Test Circuit for V
> V
KA
ref
Input
V
KA
I
off
Figure 4. Test Circuit for I
off
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
TYPICAL CHARACTERISTICS
Table 1. Graphs
FIGURE
Reference input voltage vs Free-air temperature
5
6
Reference input current vs Free-air temperature
Cathode current vs Cathode voltage
7, 8
9
Off-state cathode current vs Free-air temperature
Ratio of delta reference voltage to change in cathode voltage vs Free-air temperature
Equivalent input noise voltage vs Frequency
Equivalent input noise voltage over a 10-second period
Small-signal voltage amplification vs Frequency
Reference impedance vs Frequency
10
11
12
13
14
15
16
Pulse response
Stability boundary conditions
Table 2. Application Circuits
FIGURE
Shunt regulator
17
18
19
20
21
22
23
24
25
26
27
28
29
Single-supply comparator with temperature-compensated threshold
Precision high-current series regulator
Output control of a three-terminal fixed regulator
High-current shunt regulator
Crowbar circuit
Precision 5-V 1.5-A regulator
Efficient 5-V precision regulator
PWM converter with reference
Voltage monitor
Delay timer
Precision current limiter
Precision constant-current sink
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
†
TYPICAL CHARACTERISTICS
REFERENCE VOLTAGE
vs
REFERENCE CURRENT
vs
FREE-AIR TEMPERATURE
2600
2580
2560
2540
FREE-AIR TEMPERATURE
V
= V
ref
KA
5
I
= 10 mA
KA
R1 = 10 kΩ
‡
= 2550 mV
V
ref
R2 = ∞
I
= 10 mA
KA
4
3
2
1
0
2520
2500
‡
= 2495 mV
V
ref
2480
2460
2440
2420
2400
‡
= 2440 mV
V
ref
–75 –50 –25
0
25
50
75
100 125
T
– Free-Air Temperature – °C
A
–75 –50 –25
0
25
50
75 100 125
‡
Data is for devices having the indicated value of V at I
= 10 mA,
KA
ref
T
A
– Free-Air Temperature – °C
T
= 25°C.
A
Figure 5
Figure 6
CATHODE CURRENT
vs
CATHODE CURRENT
vs
CATHODE VOLTAGE
CATHODE VOLTAGE
150
125
100
75
800
600
400
V
T
= V
ref
V
T
= V
ref
KA
A
KA
= 25°C
= 25°C
A
I
min
50
25
0
200
0
–25
–50
–75
–100
–200
–2
–1
0
1
2
3
–1
0
1
2
3
V
KA
– Cathode Voltage – V
V
KA
– Cathode Voltage – V
Figure 7
Figure 8
†
Data at high and low temperatures are applicable only within the recommended operating free-air temperature ranges of the various devices.
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
†
TYPICAL CHARACTERISTICS
RATIO OF DELTA REFERENCE VOLTAGE TO
DELTA CATHODE VOLTAGE
vs
OFF-STATE CATHODE CURRENT
vs
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
– 0.85
– 0.95
–1.05
–1.15
–1.25
–1.35
–1.45
2.5
V
= 36 V
= 0
KA
V
= 3 V to 36 V
KA
V
ref
2
1.5
1
0.5
0
–75 –50 –25
0
25
50
75 100 125
–75 –50 –25
0
25
50
75 100 125
T
A
– Free-Air Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 9
Figure 10
EQUIVALENT INPUT NOISE VOLTAGE
vs
FREQUENCY
260
240
220
200
I
T
= 10 mA
= 25°C
O
A
180
160
140
120
100
10
100
1 k
10 k
100 k
f – Frequency – Hz
Figure 11
†
Data at high and low temperatures are applicable only within the recommended operating free-air temperature ranges of the various devices.
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
TYPICAL CHARACTERISTICS
EQUIVALENT INPUT NOISE VOLTAGE
OVER A 10-SECOND PERIOD
6
5
4
3
2
1
0
–1
–2
–3
f = 0.1 to 10 Hz
–4
–5
–6
I
T
= 10 mA
= 25°C
KA
A
0
1
2
3
4
5
6
7
8
9
10
t – Time – s
19.1 V
1 kΩ
910 Ω
500 µF
2000 µF
V
CC
V
CC
To Oscilloscope
1 µF
TL431
(DUT)
TLE2027
A
= 10 V/mV
V
+
–
22 µF
TLE2027
+
820 Ω
16 Ω
16 kΩ
16 kΩ
1 µF
–
160 kΩ
33 kΩ
33 kΩ
A
V
= 2 V/V
0.1 µF
V
EE
V
EE
Figure 12. Test Circuit for Equivalent Input Noise Voltage
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
TYPICAL CHARACTERISTICS
SMALL-SIGNAL VOLTAGE AMPLIFICATION
vs
FREQUENCY
60
50
40
30
20
I
T
= 10 mA
= 25°C
KA
A
Output
232 Ω
I
KA
15 kΩ
9 µF
+
–
8.25 kΩ
GND
10
0
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION
1 k
10 k
100 k
1 M
10 M
f – Frequency – Hz
Figure 13
REFERENCE IMPEDANCE
vs
FREQUENCY
100
I
T
= 10 mA
KA
= 25°C
A
1 kΩ
Output
10
I
KA
50 Ω
–
+
GND
1
TEST CIRCUIT FOR REFERENCE IMPEDANCE
0.1
1 k
10 k
100 k
1 M
10 M
f – Frequency – Hz
Figure 14
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
TYPICAL CHARACTERISTICS
PULSE RESPONSE
6
5
4
3
2
1
0
T
A
= 25°C
Input
220 Ω
Output
Pulse
Generator
f = 100 kHz
50 Ω
Output
GND
TEST CIRCUIT FOR PULSE RESPONSE
–1
0
1
2
3
4
5
6
7
t – Time – µs
Figure 15
†
STABILITY BOUNDARY CONDITIONS
150 Ω
100
A V
= V
ref
KA
KA
KA
KA
T
A
= 25°C
B V
C V
D V
= 5 V
I
90
80
70
KA
= 10 V
= 15 V
+
f
V
BATT
C
L
B
–
Stable
60
50
C
Stable
A
TEST CIRCUIT FOR CURVE A
40
30
20
D
I
KA
R1 = 10 kΩ
150 Ω
10
0
C
L
+
–
0.001
0.01
0.1
1
10
R2
V
BATT
C
– Load Capacitance – µF
L
†
The areas under the curves represent conditions that may cause the
device to oscillate. For curves B, C, and D, R2 and V+ were adjusted
toestablishtheinitialV andI conditionswithC =0.V
and
KA KA BATT
L
TEST CIRCUIT FOR CURVES B, C, AND D
C
were then adjusted to determine the ranges of stability.
L
Figure 16
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
APPLICATION INFORMATION
R
(see Note A)
V
V
O
I(BATT)
R1
0.1%
R1
R2
V
ref
TL431
VO
1
Vref
R2
0.1%
RETURN
NOTE A: R should provide cathode current ≥1 mA to the TL431 at minimum V
.
I(BATT)
Figure 17. Shunt Regulator
V
I(BATT)
V
O
TL431
V
V
≈ 2 V
on
Input
≈ V
off
I(BATT)
V
IT
≈ 2.5 V
GND
Figure 18. Single-Supply Comparator With Temperature-Compensated Threshold
V
I(BATT)
R
2N222
(see Note A)
2N222
30 Ω
R1
R2
VO
1
Vref
4.7 kΩ
0.01 µF
TL431
V
O
R1
0.1%
R2
0.1%
NOTE A: R should provide cathode current ≥1 mA to the TL431 at minimum V
.
I(BATT)
Figure 19. Precision High-Current Series Regulator
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
APPLICATION INFORMATION
V
I(BATT)
IN
OUT
V
O
uA7805
Common
TL431
R1
R2
R1
VO
1
Vref
Vref 5 V
Minimum VO
R2
Figure 20. Output Control of a Three-Terminal Fixed Regulator
V
V
O
I(BATT)
R1
R1
R2
VO
1
Vref
TL431
R2
Figure 21. High-Current Shunt Regulator
V
I(BATT)
V
O
R1
TL431
C
(see Note A)
R2
NOTE A: Refer to the stability boundary conditions in Figure 16 to determine allowable values for C.
Figure 22. Crowbar Circuit
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
APPLICATION INFORMATION
IN
OUT
V
LM317
V
O
≈ 5 V, 1.5 A
I(BATT)
Adjust
8.2 kΩ
243 Ω
0.1%
TL431
243 Ω
0.1%
Figure 23. Precision 5-V 1.5-A Regulator
V
V
O
≈ 5 V
I(BATT)
R
b
(see Note A)
27.4 kΩ
0.1%
TL431
27.4 kΩ
0.1%
NOTE A: R should provide cathode current ≥1-mA to the TL431.
b
Figure 24. Efficient 5-V Precision Regulator
12 V
V
CC
6.8 kΩ
10 kΩ
5 V
–
10 kΩ
0.1%
+
TL598
X
Not
TL431
Used
10 kΩ
0.1%
Feedback
Figure 25. PWM Converter With Reference
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
APPLICATION INFORMATION
R3
(see Note A)
V
I(BATT)
R4
(see Note A)
R1B
R1A
R1B
R2B
Low Limit
High Limit
1
Vref
Vref
TL431
R1A
R2A
1
LED on When Low Limit < V
I(BATT)
< High Limit
R2A
R2B
NOTE A: R3 and R4 are selected to provide the desired LED intensity and cathode current ≥1 mA to the TL431 at the available V
.
I(BATT)
Figure 26. Voltage Monitor
650 Ω
12 V
R
2 kΩ
TL431
12 V
12 V Vref
Delay
R
C
In
C
On
Off
Figure 27. Delay Timer
R
CL
0.1%
I
O
Vref
V
I(BATT)
Iout
IKA
RCL
VI(BATT
R1
)
R1
TL431
I
O
IKA
h
FE
Figure 28. Precision Current Limiter
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL431, TL431A
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS005J – JULY 1978 – REVISED JULY 1999
APPLICATION INFORMATION
V
I(BATT)
I
O
Vref
RS
IO
TL431
R
0.1%
S
Figure 29. Precision Constant-Current Sink
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1999, Texas Instruments Incorporated
TL431ACP CAD模型
引脚图
封装焊盘图
TL431ACP 替代型号
| 型号 | 制造商 | 描述 | 替代类型 | 文档 |
| TL431AIP | TI | ADJUSTABLE PRECISION SHUNT REGULATORS | 完全替代 |
|
| TL431CP | TI | ADJUSTABLE PRECISION SHUNT REGULATORS | 完全替代 |
|
| TL431IP | TI | ADJUSTABLE PRECISION SHUNT REGULATORS | 完全替代 |
|
TL431ACP 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| TL431ACP1 | FCI | Programmable Precision Reference Sink Current Capability of 1.0 to 100mA | 获取价格 |
|
| TL431ACPE4 | TI | ADJUSTABLE PRECISION SHUNT REGULATORS | 获取价格 |
|
| TL431ACPG | ONSEMI | Programmable Precision References | 获取价格 |
|
| TL431ACPK | TI | ADJUSTABLE PRECISION SHUNT REGULATORS | 获取价格 |
|
| TL431ACPK | MICROSEMI | PRECISION PROGRAMMABLE REFERENCES | 获取价格 |
|
| TL431ACPK | ROCHESTER | Three Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PSSO3, GREEN, PLASTIC, SOT-89, 3 PIN | 获取价格 |
|
| TL431ACPK-TR | MICROSEMI | Voltage Reference, BIPolar | 获取价格 |
|
| TL431ACPKG3 | TI | ADJUSTABLE PRECISION SHUNT REGULATORS | 获取价格 |
|
| TL431ACPN | NXP | Adjustable precision shunt regulators | 获取价格 |
|
| TL431ACPS | TI | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.495V, PDSO8, PLASTIC, SO-8 | 获取价格 |
|
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