TL431IPK

The TL431IPK is a precision voltage reference and adjustable shunt regulator manufactured by Texas Instruments. It is designed for a variety of applications, including power supply regulation, voltage reference, and feedback control in switching power supplies.

Key Features:

1. Adjustable Output Voltage: The TL431 can be configured to provide an output voltage that can be adjusted from 1.25V to 36V, making it versatile for different circuit requirements.

2. High Accuracy: The device offers a typical reference voltage accuracy of ±1%, ensuring reliable performance in precision applications.

3. Temperature Stability: The TL431 has a low temperature coefficient, which enhances its stability over a wide temperature range, typically from -40°C to +125°C.

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

5. Wide Supply Voltage Range: The device operates over a wide input voltage range, typically from 2.5V to 36V, allowing it to be used in various power supply designs.

6. Current Regulation: The TL431 can also function as a current regulator, making it suitable for LED driving applications.

7. Package Options: The TL431IPK is available in a TO-220 package, which provides good thermal performance and is suitable for through-hole mounting.

8. Pin Configuration: The device typically features three pins:

   • Ref (Reference): This pin is used to set the output voltage.
   • Anode: This pin connects to the load and is where the output voltage is taken.
   • Cathode: This pin connects to the input voltage and is used for feedback.

Applications:

• Switching Power Supplies: The TL431 is commonly used in feedback loops to regulate output voltage.
• Linear Regulators: It can be used in linear voltage regulation circuits.
• LED Drivers: The device can regulate current for LED applications.
• Battery Chargers: It is suitable for use in battery management systems to ensure proper charging voltages.

Electrical Characteristics:

• Reference Voltage: 1.25V (typical)
• Output Current: Up to 100 mA
• Supply Current: Typically around 1 mA
• Dynamic Output Impedance: Low, typically around 0.1Ω

Conclusion:

The TL431IPK from Texas Instruments is a highly versatile and reliable component for voltage regulation and reference applications. Its adjustable output, high accuracy, and wide operating range make it a popular choice among engineers for designing efficient power management solutions.