TL431AIDRE4

Product Overview

Category

The TL431AIDRE4 belongs to the category of voltage references.

Use

It is commonly used as a precision shunt regulator in various electronic circuits.

Characteristics

• Provides a stable reference voltage for precise voltage regulation.
• Offers high accuracy and low temperature coefficient.
• Operates over a wide temperature range.
• Can be easily programmed for different output voltages.

Package

The TL431AIDRE4 comes in a small SOT-23 package, which is suitable for surface mount applications.

Essence

The essence of TL431AIDRE4 lies in its ability to maintain a constant reference voltage regardless of changes in input voltage or load conditions.

Packaging/Quantity

The TL431AIDRE4 is typically packaged in reels containing 3000 units.

Specifications

• Reference Voltage: 2.5V to 36V
• Output Current: Up to 100mA
• Temperature Range: -40°C to +85°C
• Line Regulation: 0.2% (typical)
• Load Regulation: 0.4% (typical)

Detailed Pin Configuration

The TL431AIDRE4 has three pins:

1. Anode (A): Connected to the positive terminal of the input voltage.
2. Cathode (K): Connected to the ground or negative terminal of the circuit.
3. Reference (R): Provides the stable reference voltage.

Functional Features

• Voltage Regulation: The TL431AIDRE4 compares the reference voltage with the feedback voltage and adjusts the current flowing through it to maintain a constant output voltage.
• Programmable Output: By connecting external resistors, the output voltage can be set to a desired value within the specified range.
• Short Circuit Protection: In case of a short circuit, the TL431AIDRE4 limits the current to protect the circuit.

Advantages and Disadvantages

Advantages

• High accuracy and stability.
• Wide operating temperature range.
• Easy to use and program.
• Small package size for space-constrained applications.

Disadvantages

• Limited output current capability.
• Requires external resistors for voltage programming.

Working Principles

The TL431AIDRE4 operates based on the principle of a shunt regulator. It compares the reference voltage with the feedback voltage and adjusts the current flowing through it to maintain a constant output voltage. By varying the current, the TL431AIDRE4 ensures that the output voltage remains stable even when the input voltage or load conditions change.

Detailed Application Field Plans

The TL431AIDRE4 finds applications in various fields, including:

1. Power Supplies: It is used as a voltage reference in linear and switching power supplies to regulate the output voltage accurately.
2. Battery Charging: The TL431AIDRE4 is employed in battery charging circuits to maintain a constant charging voltage.
3. Audio Amplifiers: It is utilized in audio amplifiers to provide a stable bias voltage for improved audio performance.
4. Voltage Monitors: The TL431AIDRE4 is used in voltage monitoring circuits to detect overvoltage or undervoltage conditions.

Detailed and Complete Alternative Models

Some alternative models to TL431AIDRE4 include:

1. LM4040: A precision voltage reference with similar characteristics and package options.
2. REF3030: Another voltage reference offering high accuracy and low temperature coefficient.
3. LT1236: A precision shunt regulator with extended temperature range and higher output current capability.

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

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