TL431ASA-7

The TL431ASA-7 is a precision voltage reference and adjustable shunt regulator manufactured by Diodes Incorporated. It is designed for a variety of applications, including power supply regulation, voltage reference, and feedback control in switching power supplies. Here’s a detailed description of its features and specifications:

General Description:

The TL431ASA-7 is a three-terminal device that operates as a programmable voltage reference. It can be adjusted to output a voltage between 2.5V and 36V, making it versatile for different circuit requirements. The device is often used in applications where a stable reference voltage is critical, such as in linear regulators, battery chargers, and power management systems.

Key Features:

• Adjustable Output Voltage: The output voltage can be set using external resistors, allowing for flexibility in design.
• High Accuracy: The device offers a typical reference voltage accuracy of ±1%, ensuring reliable performance in precision applications.
• Temperature Stability: The TL431ASA-7 has a low temperature coefficient, which helps maintain output stability across varying temperatures.
• Low Output Impedance: This feature allows the device to maintain a stable output voltage even under varying load conditions.
• Wide Operating Voltage Range: The device can operate with a supply voltage ranging from 2.5V to 36V, making it suitable for a broad range of applications.
• Fast Response Time: The TL431ASA-7 has a fast response time to changes in load or input voltage, which is essential for dynamic applications.
• Built-in Protection: The device includes internal current limiting and thermal shutdown features to protect against overcurrent and overheating conditions.

Package Information:

The TL431ASA-7 is typically available in a standard 3-pin TO-92 package, which is compact and easy to integrate into various circuit designs. The package is designed for through-hole mounting, making it suitable for both prototyping and production environments.

Applications:

• Power Supply Regulation: Used in switching power supplies to provide feedback for voltage regulation.
• Battery Management Systems: Acts as a voltage reference for battery charging circuits.
• LED Drivers: Utilized in LED lighting applications for constant current regulation.
• Consumer Electronics: Employed in various consumer devices requiring stable voltage references.

Electrical Characteristics:

• Reference Voltage (Vref): 2.5V (typical)
• Reference Voltage Tolerance: ±1% (at 25°C)
• Temperature Coefficient: Typically 20 ppm/°C
• Output Current (Iout): Up to 100 mA
• Operating Temperature Range: -40°C to +125°C

Conclusion:

The TL431ASA-7 from Diodes Incorporated is a highly versatile and reliable voltage reference and shunt regulator, making it an excellent choice for engineers and designers looking for precision voltage regulation in their electronic circuits. Its combination of adjustable output, high accuracy, and robust protection features makes it suitable for a wide range of applications in both consumer and industrial electronics.