TL431CDBVRG4

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOT-23 (Small Outline Transistor)
• Essence: TL431CDBVRG4 is a voltage reference integrated circuit that provides a stable reference voltage for various applications.
• Packaging/Quantity: Available in tape and reel packaging, with 3000 units per reel.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Temperature Range: -40°C to +85°C
• Output Current: Up to 100mA
• Reference Voltage Tolerance: ±1%
• Low Dynamic Output Impedance: 0.22Ω typical
• Temperature Stability: 50ppm/°C typical

Pin Configuration

The TL431CDBVRG4 has three pins:

1. Anode (A): Connected to the positive supply voltage.
2. Cathode (K): Connected to the load or ground.
3. Reference (R): Provides the stable reference voltage.

Functional Features

• Adjustable Output Voltage: The TL431CDBVRG4 can be programmed to provide a precise output voltage by connecting external resistors.
• Precision Voltage Reference: It offers a highly accurate reference voltage for use in various applications.
• Low Power Consumption: The device operates with low quiescent current, making it suitable for battery-powered applications.
• Wide Operating Voltage Range: The TL431CDBVRG4 can operate within a wide range of input voltages, providing flexibility in different circuits.
• Short-Circuit Protection: The integrated circuit includes built-in protection against short-circuits, enhancing system reliability.

Advantages

• High precision and stability in voltage regulation.
• Easy to use and implement in various electronic circuits.
• Low cost and widely available in the market.
• Compact package size allows for space-saving designs.

Disadvantages

• Limited output current capability compared to other voltage regulators.
• Requires external resistors for precise voltage adjustment.
• Sensitivity to temperature variations may require additional compensation circuitry in some applications.

Working Principles

The TL431CDBVRG4 is a three-terminal adjustable shunt regulator. It operates by comparing the reference voltage at the Reference (R) pin with an external voltage divider connected to the Anode (A) and Cathode (K) pins. By adjusting the resistors in the voltage divider, the output voltage can be precisely set.

When the output voltage exceeds the reference voltage, the TL431CDBVRG4 starts conducting current from the Cathode (K) to the Anode (A), effectively regulating the output voltage. This feedback mechanism ensures a stable and accurate output voltage.

Detailed Application Field Plans

The TL431CDBVRG4 finds applications in various fields, including:

1. Power Supplies: It is commonly used as a voltage reference in power supply circuits to maintain stable output voltages.
2. Battery Chargers: The TL431CDBVRG4 can be employed in battery charging circuits to regulate the charging voltage accurately.
3. Audio Amplifiers: It can be utilized in audio amplifier circuits to provide a stable bias voltage for improved audio performance.
4. Voltage Monitors: The TL431CDBVRG4 is suitable for voltage monitoring applications, triggering actions when a specific voltage threshold is reached.
5. Temperature Sensors: It can be incorporated into temperature sensing circuits to provide a stable reference voltage for accurate temperature measurements.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431CDBVRG4 include:

1. LM431: Manufactured by Texas Instruments, it is a pin-to-pin compatible alternative with similar specifications.
2. KA431: Produced by Fairchild Semiconductor, it provides comparable performance and pin compatibility.
3. TLVH431: Another Texas Instruments product, it offers improved temperature stability compared to the TL431CDBVRG4.

These alternatives can be considered based on specific requirements and availability in different regions.

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