UCC28063 PFC Controller

Updated: 2026-09-12

Overview

The UCC28063 is a transition-mode power factor correction (PFC) controller from Texas Instruments, optimized for AC-DC power supplies. It employs a critical conduction mode (CrM) to achieve near-unity power factor and low total harmonic distortion (THD). Designed for applications like server power supplies, LED drivers, and industrial systems, it simplifies PFC stage design while meeting global energy standards. This IC integrates advanced features such as programmable switching frequency, soft-start, and overvoltage protection. Its compact SOIC-8 package makes it suitable for space-constrained designs. Engineers favor the UCC28063 for its reliability and minimal external component count, reducing both cost and board footprint.

Structure and Working Principle

The UCC28063 operates in transition mode (between continuous and discontinuous conduction), adjusting the MOSFET switching frequency to maintain optimal efficiency. It uses a multiplier-based control loop to shape the input current waveform, aligning it with the AC voltage for high power factor (PF > 0.99). The internal error amplifier and PWM modulator ensure stable output voltage regulation. Key components include a zero-current detector (ZCD) for CrM timing, an internal startup timer, and a line feedforward circuit for transient response. The device also features a voltage loop compensator and protection mechanisms like overcurrent and thermal shutdown. These elements collectively minimize losses and enhance system reliability.

Key Features

The UCC28063 stands out for its low-distortion performance, achieving THD below 10% even at light loads. Its programmable frequency (up to 300 kHz) allows flexibility in magnetic component selection. The integrated 7.5V gate drive simplifies MOSFET interfacing, while the low startup current (30 µA typical) reduces standby power consumption. Additional features include an adjustable soft-start to limit inrush currents and a dedicated enable pin for system control. The device supports universal input voltage ranges (85–265 VAC) and is compatible with both boost and flyback topologies. These attributes make it a versatile choice for high-efficiency PFC designs across industries.

Application Areas

The UCC28063 is widely used in power supplies for servers, telecom equipment, and industrial automation, where high PF and efficiency are critical. It is also employed in LED lighting drivers, appliance controllers, and renewable energy systems like solar inverters. Consumer electronics, such as gaming consoles and large displays, benefit from its compact design and compliance with ENERGY STAR® and EU CoC V5 standards. The controller’s ability to operate across broad input voltages makes it suitable for global markets, ensuring consistent performance under varying grid conditions.

Maintenance and Precautions

Proper PCB layout is essential to minimize noise and thermal stress. Place high-current traces short and wide, and isolate sensitive analog signals. Ensure adequate heat sinking for the MOSFET and diode, as transition-mode operation can generate significant switching losses. Follow the datasheet’s recommended component values for feedback loops and timing circuits to avoid instability. Regularly check for solder joint integrity and component aging in high-temperature environments. Using a quality gate driver and snubber circuit can further enhance longevity and performance.

B2B Procurement Guide

When sourcing the UCC28063, verify supplier authenticity to avoid counterfeit parts—prefer authorized distributors like TI’s official channels. Bulk orders (1,000+ units) typically reduce costs by 15–30%. Lead times vary but average 6–8 weeks; plan inventory accordingly. Evaluate alternative PFC controllers like the UCC28064 (higher frequency) or NCP1611 (lower cost) for specific needs. Request samples for prototyping and confirm RoHS/REACH compliance for environmental regulations. For long-term projects, secure multi-year supply agreements to mitigate market fluctuations.