Texas Instruments

UCC28521DWRG4

UCC28521DWRG4 Description

The UCC28521DWRG4 is a Power Factor Correction (PFC) controller from Texas Instruments, designed for applications requiring high efficiency and excellent power factor correction. This IC operates in average current mode, ensuring precise control over the input current waveform, which helps in achieving high power factor and low total harmonic distortion (THD). The device is housed in a 20-lead SOIC package and is suitable for surface mount applications, offering a compact and reliable solution for power management systems.

UCC28521DWRG4 Features

• Operating Mode: The UCC28521DWRG4 operates in average current mode, providing consistent and accurate control over the input current, which is crucial for maintaining a high power factor and minimizing THD.
• Switching Frequency: With a switching frequency of 200 kHz, the IC ensures efficient power conversion while keeping the size of external components manageable.
• Supply Voltage Range: The device operates within a supply voltage range of 9.7V to 18V, making it suitable for a wide range of input voltage applications.
• Low Startup Current: The low startup current of 100 µA ensures minimal power consumption during the startup phase, contributing to overall system efficiency.
• Compliance and Safety: The UCC28521DWRG4 is REACH unaffected and ROHS3 compliant, ensuring it meets stringent environmental and safety standards. It also has a moisture sensitivity level (MSL) of 1, indicating it is suitable for unlimited exposure to ambient conditions.
• Packaging: The IC is available in a tape and reel (TR) package, facilitating easy handling and integration into automated assembly processes.

UCC28521DWRG4 Applications

The UCC28521DWRG4 is ideal for a variety of applications where high power factor correction and efficient power management are critical. Some specific use cases include:

• Power Supplies: Ideal for AC-DC power supplies in consumer electronics, industrial equipment, and data centers, where maintaining a high power factor is essential for regulatory compliance and energy efficiency.
• Motor Drives: Suitable for motor drives and variable speed drives, where precise control over the input current waveform is required to ensure smooth operation and reduced harmonic distortion.
• Renewable Energy Systems: Can be used in solar inverters and wind turbines to optimize power conversion efficiency and ensure grid compatibility.
• Telecommunication Equipment: Applicable in telecom power systems where high efficiency and reliability are paramount.

Conclusion of UCC28521DWRG4

The UCC28521DWRG4 from Texas Instruments is a robust and efficient PFC controller designed to meet the demands of modern power management systems. Its average current mode operation, combined with a 200 kHz switching frequency and a wide supply voltage range, makes it a versatile solution for various applications. The low startup current and compliance with environmental and safety standards further enhance its appeal. While the product is now obsolete, it remains a benchmark for power factor correction controllers, offering significant advantages over similar models in terms of performance and reliability.