TL431BCPWR

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Adjustable Precision Shunt Regulator - Programmable Output Voltage - Low Dynamic Output Impedance - Wide Operating Current Range - High Accuracy - Low Temperature Drift - Low Noise - Fast Turn-On Response

Package: SOT-23-3

Essence: The TL431BCPWR is a three-terminal adjustable precision shunt regulator. It is commonly used as a voltage reference in various electronic circuits.

Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Initial Accuracy: ±0.5%
• Temperature Stability: ±50ppm/°C
• Dynamic Output Impedance: 0.22Ω
• Quiescent Current: 1.0mA

Pin Configuration

The TL431BCPWR 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 regulated output voltage.

Functional Features

• Adjustable Output Voltage: The TL431BCPWR allows for precise adjustment of the output voltage by using external resistors.
• Precision Shunt Regulation: It provides a stable and accurate reference voltage for use in various applications.
• Low Dynamic Output Impedance: Ensures stability and reduces voltage fluctuations.
• Wide Operating Current Range: Can handle a wide range of current requirements.
• High Accuracy: Offers precise voltage regulation with low initial accuracy and temperature drift.
• Low Noise: Minimizes electrical noise interference in sensitive circuits.
• Fast Turn-On Response: Quickly responds to changes in load conditions.

Advantages and Disadvantages

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

Disadvantages: - Limited maximum reference voltage (36V) - Requires external resistors for precise voltage adjustment

Working Principles

The TL431BCPWR operates as a shunt regulator, maintaining a stable output voltage by comparing the reference voltage at the Reference pin with an internal voltage divider. It adjusts the current flowing through the cathode to maintain the desired output voltage.

Detailed Application Field Plans

The TL431BCPWR is widely used in various applications, including:

1. Voltage References: Provides a stable reference voltage for analog-to-digital converters, digital-to-analog converters, and other precision measurement circuits.
2. Switching Power Supplies: Used as a feedback element to regulate the output voltage and improve overall system performance.
3. Battery Chargers: Ensures accurate charging voltage for different battery chemistries.
4. Audio Amplifiers: Provides biasing and stabilization for audio amplifier circuits.
5. LED Drivers: Regulates the current flowing through LEDs to maintain consistent brightness.

Detailed and Complete Alternative Models

Some alternative models that can be used instead of the TL431BCPWR are:

1. TL431AIDBZR
2. TL431ACDBVR
3. TL431BQDBZT
4. TL431CDBZR
5. TL431CDR2G

These alternatives offer similar functionality and characteristics, providing flexibility in design choices.

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