The L4981A-1LF from STMicroelectronics is a robust and efficient Power Factor Corrector (PFC) designed to enhance power quality and energy efficiency in a wide range of applications. This integrated circuit is particularly suitable for systems that require a high power factor and low THD (Total Harmonic Distortion), making it an ideal choice for AC-DC converters used in consumer electronics, industrial equipment, and lighting applications.

Key Features

• Continuous Mode (CCM) PFC: The L4981A-1LF operates in Continuous Conduction Mode, ensuring reduced ripple current and improved electromagnetic interference (EMI) performance.
• High Power Factor: It is designed to achieve a near-unity power factor, reducing reactive power on the grid and leading to better energy utilization.
• Low THD: The device ensures low Total Harmonic Distortion, which minimizes stress on the power system and extends the lifespan of electrical components.
• Wide Operating Voltage Range: The PFC can handle a broad input voltage range, accommodating various global power standards and voltage fluctuations.
• Overvoltage Protection: It includes built-in overvoltage protection to safeguard against voltage spikes and transients that could damage the system.
• Standalone Operation: The L4981A-1LF is capable of operating independently, reducing the need for external control circuitry.

Applications

The versatility of the L4981A-1LF makes it suitable for a diverse array of applications, including:

• High-efficiency AC-DC power supplies
• Power supplies for LED lighting
• Consumer electronic devices such as TVs and audio equipment
• Industrial power systems
• Power adapters for computers and laptops

Technical Specifications

• Transition-mode PFC controller
• Low (≤70μA) start-up current
• Low (≤5mA) quiescent current
• Precise adjustable output overvoltage protection
• Disable function
• Package: DIP-16, SO-20

The L4981A-1LF PFC controller from STMicroelectronics is a highly effective solution for power management, ensuring devices operate with optimal energy efficiency and reliability.