TL431AIDT

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Adjustable precision shunt regulator - Programmable output voltage - Low dynamic impedance - High stability over temperature and time - Wide operating current range - Low output noise - Fast response time

Package: SOIC-8

Essence: The TL431AIDT is a versatile integrated circuit that serves as an adjustable precision shunt regulator. It provides a stable reference voltage that can be programmed to the desired value, making it suitable for various applications.

Packaging/Quantity: The TL431AIDT is available in a standard SOIC-8 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Dynamic Output Impedance: 0.22Ω (typical)
• Temperature Coefficient: ±50ppm/°C (typical)
• Output Noise Voltage: 0.2μVrms (typical)
• Response Time: 2μs (typical)

Pin Configuration

The TL431AIDT has eight pins arranged in a dual in-line package (DIP). The pin configuration is as follows:

```

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| | --| REF K |-- --| 1 2 |-- --| ANODE CAT |-- --| 3 4 |-- --| CATHODE |-- --| 5 6 |-- --| COMP REF |-- --| 7 8 |-- |___________| ```

Functional Features

• Adjustable Output Voltage: The TL431AIDT allows the user to set the desired output voltage by connecting external resistors.
• Precision Reference: It provides a stable and accurate reference voltage for various applications.
• Low Dynamic Impedance: The low dynamic output impedance ensures good load regulation and stability.
• Wide Operating Current Range: The IC can operate within a wide range of current levels, making it suitable for different circuit requirements.
• Fast Response Time: The TL431AIDT responds quickly to changes in input conditions, ensuring rapid voltage regulation.

Advantages and Disadvantages

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

Disadvantages: - Requires external components for voltage programming - Limited maximum output current capability

Working Principles

The TL431AIDT operates as a shunt regulator, maintaining a constant voltage across its terminals. By adjusting the reference voltage using external resistors, the desired output voltage can be obtained. The TL431AIDT compares the reference voltage with the feedback voltage and adjusts the current flowing through the cathode terminal to maintain the desired output voltage.

Detailed Application Field Plans

The TL431AIDT finds applications in various fields, including:

1. Power Supplies: It is commonly used in power supply circuits to provide stable reference voltages for voltage regulation and control.
2. Battery Charging: The TL431AIDT can be employed in battery charging circuits to regulate the charging voltage and protect the battery from overcharging.
3. Audio Amplifiers: It is utilized in audio amplifier circuits to provide precise biasing and voltage stabilization.
4. Voltage Monitoring: The TL431AIDT can be used in voltage monitoring circuits to detect and respond to voltage variations.
5. LED Drivers: It finds application in LED driver circuits to regulate the current and maintain consistent brightness.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the TL431AIDT are:

1. LM431: A similar adjustable precision shunt regulator with comparable specifications.
2. TLVH431: A low-voltage version of the TL431, suitable for applications requiring lower reference voltages.
3. LT1634: A precision voltage reference IC with excellent stability and low temperature coefficient.

These alternative models offer similar functionality and can be used as substitutes depending on specific requirements.

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