STMicroelectronics L4981 - Power Factor Corrector

The L4981 from STMicroelectronics is a highly integrated Power Factor Corrector (PFC) designed for applications that require efficient power conversion with a minimized total harmonic distortion. This advanced Continuous Conduction Mode (CCM) PFC controller is suitable for a wide range of products, from industrial systems to consumer electronics, ensuring compliance with international power quality standards.

Key Features

• Wide Operating Voltage Range: The L4981 can operate over a broad input voltage range, accommodating various global power standards and enabling its use in multiple regions without the need for significant alterations.
• High Power Factor: It ensures a power factor close to unity, minimizing reactive power and thus improving the efficiency of the power distribution system.
• Low Total Harmonic Distortion: The device's advanced control algorithms reduce the total harmonic distortion of the input current, leading to less stress on the power grid and a reduction in energy loss.
• Flexibility: The L4981 provides a high level of flexibility with adjustable output voltage and a programmable switching frequency, making it adaptable to a variety of applications and specifications.
• Protection Features: It includes numerous protection features such as overvoltage, undervoltage, overcurrent, and thermal shutdown, ensuring the longevity and reliability of both the PFC controller and the end application.

Applications

The versatility of the L4981 PFC controller makes it an ideal choice for a range of applications, including:

• High-efficiency AC-DC converters
• Power supplies for desktops, servers, and telecommunication systems
• Consumer electronics such as TVs and audio systems
• Industrial power systems requiring high power factor

With its combination of efficiency, flexibility, and protective features, the STMicroelectronics L4981 PFC controller is a compelling solution for designers looking to enhance power quality and efficiency in their next-generation electronic products.