UCC28631DR

The UCC28631DR is a highly integrated, high-efficiency, flyback converter controller designed by Texas Instruments. It is primarily used in power supply applications, particularly for low-power, isolated designs. Here’s a detailed description of its features and specifications:

Key Features:

1. Integrated Controller: The UCC28631 integrates a PWM controller with a high-voltage startup circuit, which simplifies the design and reduces the number of external components required.

2. High Efficiency: The device is designed to achieve high efficiency across a wide load range, making it suitable for applications where energy efficiency is critical, such as in power adapters and chargers.

3. Wide Input Voltage Range: It supports a wide input voltage range, typically from 85V to 265V AC, allowing it to be used in various global applications without the need for extensive modifications.

4. Quasi-Resonant Operation: The UCC28631 employs quasi-resonant switching, which minimizes switching losses and improves overall efficiency, especially at light loads.

5. Low Standby Power: The controller features a low standby power mode, which helps in meeting energy efficiency standards by reducing power consumption when the load is minimal.

6. Built-in Protection Features: It includes several protection mechanisms such as over-voltage protection (OVP), under-voltage lockout (UVLO), and thermal shutdown, ensuring reliable operation and safeguarding the circuit from potential damage.

7. Frequency Modulation: The device can modulate the switching frequency to reduce electromagnetic interference (EMI), which is crucial for meeting regulatory standards in many applications.

8. Compact Package: The UCC28631 is available in a small, surface-mount package (DGN), which is advantageous for space-constrained designs.

Applications:

• Power Adapters: Ideal for use in wall-mounted power adapters for consumer electronics.
• LED Drivers: Suitable for driving LED lighting systems where efficiency and compactness are essential.
• Telecom Power Supplies: Can be used in telecom equipment requiring isolated power supplies.
• Industrial Power Supplies: Applicable in various industrial applications where reliable and efficient power conversion is needed.

Electrical Characteristics:

• Operating Temperature Range: Typically from -40°C to +125°C, making it suitable for a wide range of environmental conditions.
• Switching Frequency: The device operates at a frequency that can be adjusted based on the application requirements, typically in the range of 100 kHz to 150 kHz.

Conclusion:

The UCC28631DR from Texas Instruments is a versatile and efficient solution for designing power supplies in various applications. Its combination of high efficiency, integrated features, and robust protection mechanisms makes it a popular choice among engineers looking to create reliable and compact power solutions.