TL431AID

The TL431AID is a precision voltage reference and adjustable shunt regulator manufactured by Texas Instruments. It is widely used in various electronic applications due to its versatility and reliability. Here’s a detailed description of its features and specifications:

General Overview:

• Type: Adjustable Shunt Regulator
• Manufacturer: Texas Instruments
• Package Options: Typically available in a TO-92, SOIC, or TSSOP package, which makes it suitable for both through-hole and surface-mount applications.

Key Features:

1. Adjustable Output Voltage: The TL431 allows for an adjustable output voltage range from 2.5V to 36V, making it suitable for a variety of applications where specific voltage levels are required.

2. High Accuracy: It offers a typical reference voltage accuracy of ±1%, ensuring that the output voltage remains stable and precise under varying conditions.

3. Temperature Stability: The device has a low temperature coefficient, which enhances its performance across a wide temperature range, typically from -40°C to +125°C.

4. Low Output Impedance: The TL431 features low output impedance, which helps maintain a stable output voltage even under varying load conditions.

5. Wide Operating Current Range: It operates effectively with a wide range of current, typically from 1 mA to 100 mA, allowing it to be used in different circuit configurations.

6. Fast Response Time: The device has a fast response time to changes in load or input voltage, making it suitable for dynamic applications.

7. Built-in Protection: The TL431 includes internal protection features such as thermal shutdown and current limiting, enhancing its reliability in various applications.

Applications:

• Power Supply Regulation: Commonly used in power supply circuits to provide stable voltage references.
• Voltage Monitoring: Utilized in voltage monitoring systems to ensure that voltage levels remain within specified limits.
• Battery Management Systems: Employed in battery chargers and management systems to regulate charging voltages.
• LED Drivers: Used in LED driver circuits to maintain consistent brightness levels.

Pin Configuration:

The TL431 typically has three pins:

• Ref (Reference): This pin is used to set the output voltage by connecting a resistor divider.
• Anode: The positive terminal for the shunt regulator.
• Cathode: The output terminal where the regulated voltage is taken.

Electrical Characteristics:

• Reference Voltage (Vref): 2.5V nominal
• Supply Voltage (VKA): Up to 36V
• Output Current (Iout): Up to 100 mA
• Temperature Range: -40°C to +125°C

Conclusion:

The TL431AID from Texas Instruments is a highly versatile and reliable component that is essential in many electronic designs requiring precise voltage regulation. Its adjustable output, high accuracy, and robust performance make it a popular choice among engineers and designers in the field of electronics.