TL431ID集成电路（IC）的电压基准规格书PDF中文资料

TL431ID属于集成电路（IC）的电压基准。由德州仪器制造生产的TL431ID电压基准产品属于基准电压源系列，可通过相对较不稳定的电源提供稳定的电势，电压值始终保持恒定，以便在测量、控制和类似应用中用作比较的标准。其功能行为可能与用于大功率调节的线性稳压器相似，但基准电压源器件却不适合用于此类用途。用作比较标准时，若输出电流容量或实际负载电流增大，其性能通常会降低。

1 Features

• Reference voltage tolerance at 25°C

– 0.5% (B grade)

– 1% (A grade)

– 2% (Standard grade)

• Adjustable output voltage: Vref to 36V

• Operation from −40°C to 125°C

• Typical temperature drift (TL43xB)

– 6mV (C temp)

– 14mV (I temp, Q temp)

• Low Output Noise

• 0.2Ω Typical output impedance

• Sink-current capability: 1mA to 100mA

2 Applications

• Rack server power

• Industrial AC/DC

• AC inverter & VF drives

• Servo drive control module

• Notebook PC power adapter design

3 Description

The TL431 and TL432 devices are three-terminal

adjustable shunt regulators, with specified thermal

stability over applicable automotive, commercial, and

military temperature ranges. The output voltage can

be set to any value between Vref (approximately

2.5V) and 36V, with two external resistors. These

devices have a typical output impedance of 0.2Ω.

Active output circuitry provides a very sharp turnon

characteristic, making these devices excellent

replacements for Zener diodes in many applications,

such as on-board regulation, adjustable power

supplies, and switching power supplies. The TL432

device has exactly the same functionality and

electrical specifications as the TL431 device, but has

different pinouts for the DBV, DBZ, and PK packages.

Both the TL431 and TL432 devices are offered in

three grades, with initial tolerances (at 25°C) of

0.5%, 1%, and 2%, for the B, A, and standard

grade, respectively. In addition, low output drift versus

temperature verifies good stability over the entire

temperature range.

The TL43xxC devices are characterized for operation

from 0°C to 70°C, the TL43xxI devices are

characterized for operation from –40°C to 85°C, and

the TL43xxQ devices are characterized for operation

from –40°C to 125°C.