首页 > TL431CH

TL431CH

更新时间：2024-09-18 12:16:59

品牌：FCI

描述：Programmable Precision Reference Sink Current Capability of 1.0 to 100mA

PDF下载

中文翻译

PCB计价

概述
数据手册

如果您发现信息不准确，欢迎纠错

TL431CH 概述

Programmable Precision Reference Sink Current Capability of 1.0 to 100mA 可编程精密基准灌电流的1.0能力为100mA

TL431CH 数据手册

通过下载TL431CH数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。

PDF下载

TL431 Programmable Precision Reference

he TL431 integrated circuits are three-terminal programmable shunt regulator diodes.

T_{These monolithic IC voltage references operate as a low temperature coefficient zener}

which is programmable from Vref to 36 volts with two external resistors. This device exhibits a

wide operating current range of 1.0 to 100 mA with a typical dynamic impedance of 0.22Ω. The

characteristics of these references make them excellent replacements for zener diodes in many

applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5 volt

reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and

since the TL431 operates as a shunt regulator, it can be used as either a positive or negative

voltage reference

FEATURE

1. Programmable Output Voltage to 36 Volts

2. Low Dynamic Output Impedance,0.22Ω Typical

3. Sink Current Capability of 1.0 to 100mA

REFERENCE

4. Equivalent Full-Range Temperature

ANODE

Coefficient of 50ppm/℃ Typical

CATHODE

5. Temperature Compensated for Operation over

Full Rated Operating Temperature Range

TO-92 TOP VIEW

6. Low Output Noise Voltage

ANODE

REF

CATHODE

SOT-23 TOP VIEW

REF ANODE CATHODE

SOT-89 TOP VIEW

CATHODE

ANODE

REF

CATHODE

REF

ANODE

SOP-8 TOP VIEW

DIP-8 TOP VIEW

2001-05-A

TL431 Programmable Precision Reference

ꢀ BLOCK DIAGRAM

Cathode

800

(K)

Cathode

(K)

800

Ref erence

(R)

20pF

Reference

(R)

Anode

(A)

SYMBOL

150

3.28K

4.0K

10K

Cathode(K)

2.4K

7.2K

20pF

Reference(R)

1.0K

2.5Vref

800

Anode(A)

Representative Block Diagram

Anode

(A)

ꢀ ABSOLUTE MAXIMUM RATINGS

(Full operating ambient temperature range applies, unless otherwise noted)

Rating

Symbol

V_KA

Value

Unit

Cathode To Anode Voltage

Cathode Current Range, Continuous

I_K

-100 to +150

Reference Input Current Range,

Continuous

I_ref

T_J

-0.05 to +10

150

℃

Operating Junction Temperature

Operating Ambient Temperature Range

TL431CT/CP/CD/CH/CLT1

℃

T_A

-20 ~ +85

Storage temperature Range

T_stg

-65 to +150

Total Power Dissipation @T_A=25℃

Derate above 25℃ Ambient

Temperature

T,D Suffix Package

P Suffix Package

H Suffix Package

LT1 Suffix Package

0.70

1.10

1.0

P_D

0.28

2001-05-A

TL431 Programmable Precision Reference

Total Power Dissipation @T_C=25℃

Derate above 25℃ Case Temperature

T,D Suffix Package

1.5

3.0

P_D

P Suffix Package

H Suffix Package

LT1 Suffix Package

ꢀ THERMAL CHARACTERISTICS

T,D

LT1

Characteristics

Symbol

Unit

Suffix Suffix Suffix Suffix

℃/W

Thermal Resistance, Junction to Ambient

Thermal Resistance, Junction to Case

178

114

110

575

150

Rθ

ꢀ RECOMMENDED OPERATING CONDITIONS

Condition/Value

Cathode to Anode Voltage

Cathode Current

Symbol

V_KA

Min

V_ref

1.0

Max

Unit

I_K

100

ꢀ ELECTRICAL CHARACTERISTICS(Ambient temperature at 25℃ unless otherwise noted)

TL431

Characteristic

Symbol

Unit

Min

Typ

Max

Reference Input Voltage (Fig 1)

V_KA=V_ref, I_K=10mA

V_ref

2.483

2.470

2.445

2.507

2.520

2.55

T_A=+25℃ Tolerance 0.5%

2.495

2.453

2.537

T_A=T_lowto T_high(Note 1)

Reference Input Voltage Deviation Over

Temperature Range (Fig 1, Note 1,2)

V_KA=V_ref. I_K=10mA

ΔV_ref

3.0

Ratio of Change in Reference Input Voltage

To Change in Cathode to Anode Voltage

I_K=10mA (Figure 2), ΔV_KA=10V to V_ref

ΔV_KA=36V to 10V

∆Vref

∆VKA

mV/V

-1.4

-1.0

-2.7

-2.0

2001-05-A

TL431 Programmable Precision Reference

Reference Input Current (Figure 2)

I_K=10mA, R1=10k, R2=∞

T_A=+25℃

I_ref

µA

1.8

4.0

5.2

T_A=T_lowto T_high(Note 1)

Reference Input Current Deviation Over

Temperature Range (Figure 2, Note 1)

I_K=10mA, R1=10k, R2=∞

ΔI_ref

0.4

1.2

Minimum Cathode Current for Regulation

V_KA=V_ref(Figure 1)

I_min

0.5

260

0.22

1.0

1000

0.5

Off-State Cathode Current (Figure 3)

V_KA=36V, V_ref=0V

I_off

Dynamic Impedance (Figure 1, Note 3)

V_KA=V_ref, ΔI_K=1.0mA to 100mA, f< 1.0kHz

|Z_KA|

T_low=0℃, T_high=+70℃

The deviation parameter ΔV_refis defined as the differences between the maximum and

minimum values obtained over the full operating ambient temperature range the applies.

The average temperature coefficient of the reference input voltage, αV_ref, is defined as:

∆V^ref

×10⁶

^ref@25°C

ppm

∆V^ref×10⁶

αV_ref

°C

∆TA

∆T (Vref @25°C)

αV_refcan be positive or negative depending on whether V_refMin of V_refMax occurs at the

lower ambient temperature. (Refer to Figure 6)

Example: ΔV_ref=8.0mV and slope is positive, V_ref@25℃=2.495V, ΔT_A=70℃

0.008×10⁶

αV_ref=

=45.8 ppm/℃

70(2.495)

2001-05-A

TL431 Programmable Precision Reference

The dynamic impedance Z_KAis defined as:

∆V^KA

| Z_KA| =

∆IK

When the device is programmed with two external resistors, R1 and r2, (refer to Figure 2)

the total dynamic impedance of the circuit is defined as:

| ZKA’|≈| Z_KA| (1+

)

2001-05-A

TL431 Programmable Precision Reference

ꢀ TEST CIRCUITS

V_KA= V_ref(1+

)+ I_ref‧R1

Fig 1.Test Circuit for VKA=Vref

Fig 2.Test Circuit for VKA>Vref

Fig 3.Test Circuit for I^off

ꢀ APPLICATION EXAMPLE

Fig 4.Test circuit for curves A of stability

boundary conditions

Fig 5.Test circuit for curves B.C and D of

stability boundary conditions

Fig 6.Shunt regulator

Fig 7.High current shunt regulator

2001-05-A

TL431 Programmable Precision Reference

Fig 8. Output control of a three-

Fig 9. Series pass regulator

Terminal fixed regulator

Fig 10 .Constant current source

Fig 11 .Constant current sink

Fig 12 .Triac crowbar

Fig 13.SCR crowbar

2001-05-A

TL431 Programmable Precision Reference

Fig 14.Voltage monitor

Fig 15 . Single-supply comparator with

temperature-compensated threshold

Fig 16 .Simple 400mW phone amplifier

Fig 17.Liner ohmmeter

2001-05-A

TL431 Programmable Precision Reference

Test

Line Regulation

Load Regulation

Output Ripple

Efficiency

Conditions

Vin=10V to 20V,Io=1.0A

Vin=15V ,Io=0A to 1.0A

Vin=10V ,Io=1.0A

Vin=20V,Io=1.0A

Vin=15V,Io=1.0A

Results

53mV (1.1%)

25mV (0.5%)

50mVPP P.A.R.D

100mVPP P.A.R.D

82%

Fig 18.High efficiency step-down switching converter

2001-05-A

TL431 Programmable Precision Reference

ꢀ ELECTRICAL CHARACTERISTICS CURVES

Fig 19.Cathode current versus cathode voltage Fig 20.Cathode current versus cathode voltage

Fig 21.Reference input voltage versus ambient Fig 22.Reference input current versus ambient

temperature temperature

Fig 23.Change in reference input voltage versus Fig 24. Off state cathode current versus

Cathode voltage ambient temperature

2001-05-A

TL431 Programmable Precision Reference

Fig 25. Dynamic impedance versus frequency

Fig 26.Dynamic impedance versus ambient

temperature

Fig 28. Spectral noise density

Fig 27. Open loop voltage gain versus frequency

Fig 29. Pulse response

Fig 30. Stability boundary conditions

2001-05-A

TL431 Programmable Precision Reference

ORDER INFORMATION

DEVICE

TL431BCT 0.5%

TL431ACT 1%

TEMPERATURE RANGE

-20~+85℃

PACKAGE

TO-92

DIP-8

SOP-8

SOT-23

SOT-89

TL431CT 2%

TL431BCP 0.5%

TL431ACP 1%

TL431CP 2%

TL431BCD 0.5%

TL431ACD 1%

TL431CD 2%

TL431BCLT1 0.5%

TL431ACLT1 1%

TL431CLT1 2%

TL431BCH 0.5%

TL431ACH 1%

TL431CH

2001-05-A

TL431CH 相关器件

型号	制造商	描述	价格	文档
TL431CKTPR	TI	ADJUSTABLE PRECISION SHUNT REGULATORS	获取价格
TL431CKTPR	ROCHESTER	Three Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PSSO2, PLASTIC, FM-3/2	获取价格
TL431CKTPRR	TI	暂无描述	获取价格
TL431CL3T	STMICROELECTRONICS	Programmable voltage reference	获取价格
TL431CL5T	STMICROELECTRONICS	Programmable voltage reference	获取价格
TL431CLF	IKSEMICON	Programmable Precision Reference	获取价格
TL431CLP	Wing Shing	Adjustable Precision Shunt Regulator	获取价格
TL431CLP	FAIRCHILD	Programmable Shunt Regulator	获取价格
TL431CLP	MICROSEMI	PRECISION PROGRAMMABLE REFERENCES	获取价格
TL431CLP	MOTOROLA	PROGRAMMABLE PRECISION REFERENCES	获取价格