Texas Instruments

UC3853D

UC3853D Description

The UC3853D from Texas Instruments is a high-performance Average Current Mode Power Factor Correction (PFC) Controller designed for active power factor correction in AC/DC power supplies. Operating within a 12V to 40V supply range, it ensures efficient power conversion with a switching frequency of 56kHz to 94kHz, making it suitable for a wide range of industrial and commercial applications. The device is housed in an 8-SOIC package and is RoHS3 compliant, meeting stringent environmental standards. With a low startup current of 250 µA, it minimizes power loss during initialization, enhancing overall system efficiency.

UC3853D Features

• Average Current Mode Control: Ensures precise current regulation, improving power factor and reducing harmonic distortion.
• Wide Operating Voltage Range (12V–40V): Supports diverse power supply designs.
• Low Startup Current (250 µA): Reduces standby power consumption.
• Switching Frequency (56kHz–94kHz): Optimized for efficiency and EMI performance.
• Surface-Mount (SOIC-8) Package: Compact and suitable for high-density PCB layouts.
• Robust Compliance: RoHS3, REACH Unaffected, and EAR99 certified for global deployment.
• Extended Temperature Range (0°C to 70°C): Reliable operation in varying environmental conditions.

UC3853D Applications

The UC3853D is ideal for active PFC stages in:

• Switched-Mode Power Supplies (SMPS): Enhances efficiency in AC/DC converters.
• LED Drivers: Ensures stable power delivery with high power factor.
• Industrial Power Systems: Complies with harmonic standards (e.g., IEC 61000-3-2).
• Server & Telecom PSUs: Reduces input current distortion for cleaner power.
• Consumer Electronics: Improves energy efficiency in appliances.

Conclusion of UC3853D

The UC3853D stands out as a highly efficient, compact, and compliant PFC controller, offering superior performance in power factor correction applications. Its average current mode control, low startup current, and wide voltage range make it a preferred choice for engineers designing energy-efficient power systems. Whether for industrial, commercial, or consumer electronics, the UC3853D delivers reliable, high-performance PFC with minimal design complexity.