TL431ACPSR

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics:
  • Adjustable precision shunt regulator
  • Programmable output voltage
  • Low dynamic impedance
  • Wide operating current range
• Package: SOT-23
• Essence: TL431ACPSR is a voltage reference integrated circuit that provides a stable reference voltage for various applications.
• Packaging/Quantity: Available in reels of 3000 units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Accuracy: ±1%
• Output Current Capability: 100mA

Detailed Pin Configuration

The TL431ACPSR package consists of three pins:

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

Functional Features

• Adjustable Output Voltage: The TL431ACPSR allows the user to program the desired output voltage by connecting external resistors.
• Precision Voltage Reference: It provides a highly accurate and stable reference voltage, ensuring precise regulation in various applications.
• Low Dynamic Impedance: The low dynamic impedance enables efficient voltage regulation even with varying load conditions.
• Wide Operating Current Range: The device can operate within a wide current range, making it suitable for different load requirements.

Advantages and Disadvantages

Advantages

• High accuracy and stability
• Easy programmability
• Low dynamic impedance
• Wide operating current range
• Compact SOT-23 package

Disadvantages

• Limited output current capability (100mA)
• Requires external resistors for voltage adjustment

Working Principles

The TL431ACPSR is based on the principle of a shunt regulator. It compares the reference voltage at the Reference pin with the voltage across the external resistor network. By adjusting the resistance values, the desired output voltage can be set. The TL431ACPSR then regulates the voltage by varying its internal impedance to maintain a stable output.

Detailed Application Field Plans

The TL431ACPSR 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: The TL431ACPSR can be employed in battery charging circuits to regulate the charging voltage and prevent overcharging.
3. Audio Amplifiers: It is utilized in audio amplifier circuits to provide a stable bias voltage for improved audio performance.
4. Voltage Monitoring: The TL431ACPSR can be used in voltage monitoring circuits to trigger alarms or shutdown systems when the voltage exceeds a certain threshold.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431ACPSR are:

1. LM4040: Precision Shunt Voltage Reference
2. LT1236: Micropower Precision Shunt Voltage Reference
3. REF3030: Low Dropout Voltage Reference

These alternatives provide comparable accuracy, stability, and programmability features, making them suitable replacements for the TL431ACPSR in various applications.

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