TL431CLPRAG

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage reference and shunt regulator

Characteristics: - Adjustable precision voltage reference - Low dynamic output impedance - Wide operating current range - High accuracy and stability - Fast response time

Package: SOP-8 (Small Outline Package)

Essence: The TL431CLPRAG is a three-terminal adjustable precision shunt regulator. It provides a highly accurate reference voltage that can be adjusted to the desired level using external resistors.

Packaging/Quantity: The TL431CLPRAG is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Output Voltage Tolerance: ±1%
• Dynamic Output Impedance: 0.22Ω
• Cathode Current: 1mA to 100mA
• Anode Current: 1mA to 150mA

Pin Configuration

The TL431CLPRAG has eight pins arranged as follows:

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| | --|____|-- Vref --|____|-- Anode --|____|-- Cathode --|____|-- NC --|____|-- NC --|____|-- NC --|____|-- NC ```

Functional Features

1. Voltage Reference: The TL431CLPRAG provides a stable and precise reference voltage that can be adjusted according to the application requirements.
2. Shunt Regulation: It acts as a shunt regulator by maintaining a constant voltage drop across the load, ensuring a stable output voltage.
3. Adjustable Output: The output voltage can be easily adjusted by connecting external resistors to the reference and cathode pins.
4. Low Dynamic Output Impedance: The TL431CLPRAG exhibits a low dynamic output impedance, allowing it to provide a stable voltage even with varying load conditions.
5. Wide Operating Current Range: It can operate within a wide range of current levels, making it suitable for various applications.

Advantages and Disadvantages

Advantages: - High accuracy and stability - Adjustable output voltage - Fast response time - Wide operating current range

Disadvantages: - Requires external resistors for voltage adjustment - Limited maximum output current capability

Working Principles

The TL431CLPRAG works based on the principle of feedback control. It compares the reference voltage at the Vref pin with the voltage across the external resistor network connected to the cathode pin. By adjusting the current flowing through the internal transistor, it maintains a constant voltage drop across the load, ensuring a stable output voltage.

Detailed Application Field Plans

The TL431CLPRAG is widely used in various applications, including:

1. Voltage Regulation: It is commonly used as a voltage reference and shunt regulator in power supplies, battery chargers, and voltage regulators.
2. Precision Instrumentation: It finds application in precision measurement instruments, where accurate and stable voltage references are required.
3. Audio Amplifiers: The TL431CLPRAG can be used in audio amplifiers to provide a stable bias voltage for improved performance.
4. LED Drivers: It is utilized in LED drivers to maintain a constant voltage across the LEDs, ensuring consistent brightness.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431CLPRAG include:

1. LM431: Manufactured by Texas Instruments, it is a direct replacement for the TL431CLPRAG with similar specifications.
2. KA431: Produced by Fairchild Semiconductor, it is another alternative with comparable features and performance.
3. TLVH431: Manufactured by STMicroelectronics, it offers similar voltage reference capabilities as the TL431CLPRAG.

These alternative models can be considered based on specific application requirements and availability.

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