Texas Instruments

UC3854N-F  

Power Factor Correction ICs

UC3854N-F Description

The UC3854N-F is a Power Factor Correction (PFC) controller IC designed for average current mode control, offering robust performance and precise regulation. Manufactured by Texas Instruments, this IC is housed in a through-hole package, specifically a tube, making it suitable for applications requiring high reliability and ease of integration. The UC3854N-F operates within a supply voltage range of 14.5V to 30V and features a switching frequency of 200kHz, ensuring efficient power conversion. Its operating temperature range spans from 0°C to 70°C, making it suitable for a variety of industrial and consumer applications.

UC3854N-F Features

• Average Current Mode Control: The UC3854N-F employs average current mode control, providing precise regulation of the output current. This mode of operation ensures stable performance across a wide range of load conditions and enhances the overall efficiency of the power conversion process.
• Wide Supply Voltage Range: With a supply voltage range of 14.5V to 30V, the UC3854N-F can accommodate various input voltage levels, making it versatile for different power supply designs.
• High Switching Frequency: The 200kHz switching frequency allows for compact design and high efficiency, reducing the size of passive components such as inductors and capacitors.
• Low Startup Current: The UC3854N-F requires only 1.5 mA for startup, enabling quick and efficient initialization of the power conversion process.
• Compliance and Reliability: The UC3854N-F is REACH unaffected and RoHS3 compliant, ensuring it meets stringent environmental and safety standards. Its moisture sensitivity level (MSL) is 1 (unlimited), making it highly reliable in various environmental conditions.
• Obsolete Product Status: While the UC3854N-F is marked as obsolete, it remains a reliable choice for legacy systems and applications where its specific features are required.

UC3854N-F Applications

The UC3854N-F is ideal for applications requiring high efficiency and precise power factor correction. Some specific use cases include:

• AC-DC Power Supplies: The UC3854N-F is well-suited for power factor correction in AC-DC power supplies, ensuring compliance with international standards and enhancing overall system efficiency.
• Industrial Equipment: Its robust design and wide operating temperature range make it suitable for industrial applications where reliability and performance are critical.
• Consumer Electronics: The UC3854N-F can be used in consumer electronics requiring efficient power conversion and power factor correction, such as televisions, monitors, and other high-power devices.
• Legacy Systems: For existing systems that were designed with the UC3854N-F, this IC remains a viable option for maintenance and replacement, ensuring continued operation and compatibility.

Conclusion of UC3854N-F

The UC3854N-F from Texas Instruments is a reliable and efficient PFC controller IC, offering precise average current mode control and a wide supply voltage range. Its high switching frequency and low startup current make it ideal for compact and efficient power conversion designs. Despite its obsolete status, the UC3854N-F remains a valuable component for legacy systems and applications where its unique features are essential. Its compliance with environmental and safety standards ensures it meets the demands of modern electronics manufacturing.

UC3854N-F Documents

Download datasheets and manufacturer documentation for UC3854N-F