TL431BCLPRAG

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOT-23
• Essence: Programmable Precision Reference
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

The TL431BCLPRAG is an integrated circuit voltage reference that operates as a precision shunt regulator. It is designed to provide a stable reference voltage with high accuracy and low temperature coefficient. The device is housed in a small SOT-23 package, making it suitable for space-constrained applications.

Detailed Pin Configuration

The TL431BCLPRAG features three pins:

1. Anode (A): This pin is connected to the positive supply voltage.
2. Cathode (K): This pin is connected to the load or ground.
3. Reference (R): This pin provides the regulated output voltage.

Functional Features

• Adjustable Output: The TL431BCLPRAG allows for precise adjustment of the output voltage using external resistors.
• High Accuracy: The device offers a typical output voltage tolerance of ±1%.
• Low Temperature Coefficient: With a low temperature coefficient of 50 ppm/°C, the TL431BCLPRAG ensures stable performance over a wide temperature range.
• Low Dynamic Impedance: The integrated circuit exhibits low dynamic impedance, enabling it to maintain a stable output voltage even under varying load conditions.

Advantages and Disadvantages

Advantages

• Wide Range of Applications: The TL431BCLPRAG can be used in various electronic circuits requiring a stable voltage reference.
• Cost-Effective Solution: The device provides accurate voltage regulation at a relatively low cost.
• Small Package Size: The SOT-23 package makes it suitable for compact designs and space-constrained applications.

Disadvantages

• Limited Output Current: The TL431BCLPRAG has a maximum output current rating of 100 mA, which may not be sufficient for high-power applications.
• External Components Required: To achieve the desired output voltage, external resistors are needed, adding complexity to the circuit design.

Working Principles

The TL431BCLPRAG operates based on the principle of a shunt regulator. It compares the reference voltage at the Reference (R) pin with an adjustable voltage divider formed by external resistors connected between the Anode (A) and Cathode (K) pins. By adjusting the resistor values, the output voltage can be precisely set to the desired level. The TL431BCLPRAG continuously monitors the output voltage and adjusts its internal resistance to maintain a stable output.

Detailed Application Field Plans

The TL431BCLPRAG finds applications in various fields, including:

1. Power Supplies: It is commonly used as a voltage reference in power supply circuits to ensure stable and accurate output voltages.
2. Battery Charging Systems: The TL431BCLPRAG can be employed in battery charging circuits to regulate the charging voltage and prevent overcharging.
3. Audio Amplifiers: It can be utilized in audio amplifier circuits to provide a stable bias voltage for improved performance.
4. Voltage Monitors: The TL431BCLPRAG is suitable for voltage monitoring applications, where it can trigger alarms or shutdown systems when the voltage exceeds a certain threshold.

Detailed and Complete Alternative Models

Some alternative models to the TL431BCLPRAG include:

1. TLV431: This device offers similar functionality and characteristics but comes in a different package (TO-92).
2. LM4040: It is a precision voltage reference with fixed output voltages available in various package options.
3. REF3030: This integrated circuit voltage reference provides a fixed output voltage with low temperature drift.

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

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