Texas Instruments

UCC38502N

UCC38502N Description

The UCC38502N from Texas Instruments is an advanced Average Current Mode Power Factor Correction (PFC) Controller IC, designed for high-efficiency AC/DC power conversion systems. Packaged in a 20-pin DIP (Through Hole) configuration, it operates within a 9.7V to 18V supply range and supports a switching frequency of 100kHz. This IC is optimized for continuous conduction mode (CCM) PFC applications, ensuring low harmonic distortion and high power factor (>0.99). With a low startup current of 150µA, it minimizes power losses during initialization. The device is RoHS3 compliant and rated for commercial temperature ranges (0°C to 70°C), making it suitable for industrial and consumer power supplies.

UCC38502N Features

• Average Current Mode Control: Ensures precise current shaping for improved power factor correction.
• Wide Supply Range (9.7V–18V): Compatible with various auxiliary power rails.
• Low Startup Current (150µA): Reduces standby power consumption.
• 100kHz Switching Frequency: Balances efficiency and component size.
• Through-Hole (DIP) Packaging: Simplifies prototyping and legacy system integration.
• Robust Protection: Includes overvoltage, undervoltage, and overcurrent safeguards.
• REACH Unaffected & ROHS3 Compliant: Meets environmental and regulatory standards.

UCC38502N Applications

• AC/DC Power Supplies: Ideal for server PSUs, telecom rectifiers, and industrial power systems requiring high power factor.
• LED Drivers: Enhances efficiency in high-brightness LED lighting applications.
• Consumer Electronics: Used in TVs, monitors, and appliances to meet energy efficiency standards (e.g., 80 PLUS).
• Renewable Energy Systems: Suitable for solar inverters where input current shaping is critical.

Conclusion of UCC38502N

The UCC38502N stands out for its precision current control, low startup power, and robust protection features, making it a reliable choice for high-performance PFC stages. While it is in Last Time Buy status, its through-hole packaging and commercial-grade specs ensure compatibility with existing designs. Engineers seeking a cost-effective, compliant PFC solution for medium-power applications will find this IC highly effective. For new designs, consider evaluating TI’s newer PFC controllers with enhanced features.