UCC28019

Updated: 2026-09-22

Overview

The UCC28019 is a power factor correction (PFC) controller IC developed by Texas Instruments. It is designed to improve the power factor of AC-DC power supplies, ensuring compliance with international energy efficiency standards. The IC is widely used in industrial, consumer, and telecommunications applications due to its high performance and reliability. The UCC28019 operates in continuous conduction mode (CCM) and features a transition mode (TM) for improved efficiency at light loads. Its advanced control algorithms help reduce harmonic distortion and improve power quality, making it a preferred choice for modern power supply designs.

Structure and Working Principle

The UCC28019 integrates a high-speed multiplier, voltage error amplifier, and current sense amplifier to achieve precise control of the power factor correction process. The IC uses a boost converter topology to shape the input current waveform, aligning it with the input voltage waveform for optimal power factor. The controller operates by comparing the input voltage and current signals, adjusting the duty cycle of the boost converter to minimize phase differences. This ensures that the power supply draws current in a sinusoidal manner, reducing reactive power and improving overall efficiency.

Key Features

The UCC28019 offers several key features that make it stand out in power factor correction applications. These include a wide input voltage range (85V to 265V AC), low standby power consumption (<100mW), and high efficiency (>95%). The IC also supports soft-start functionality to reduce inrush current during startup. Additionally, the UCC28019 includes protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown. These safeguards ensure reliable operation under varying load conditions and enhance the longevity of the power supply system.

Application Areas

The UCC28019 is commonly used in AC-DC power supplies for industrial equipment, consumer electronics, and telecommunications devices. Its ability to improve power factor and reduce harmonic distortion makes it suitable for applications such as LED lighting, servers, and power adapters. In industrial settings, the UCC28019 is often deployed in motor drives, uninterruptible power supplies (UPS), and renewable energy systems. Its high efficiency and reliability help reduce energy costs and ensure compliance with stringent regulatory requirements.

Maintenance and Precautions

To ensure optimal performance of the UCC28019, proper thermal management is essential. The IC should be mounted on a PCB with adequate copper area for heat dissipation. Additionally, designers should adhere to the recommended operating conditions specified in the datasheet to avoid exceeding maximum ratings. Electrostatic discharge (ESD) precautions must be observed during handling and installation. Using anti-static wrist straps and working on grounded surfaces can prevent damage to the sensitive semiconductor components. Regular inspection of the power supply circuit for signs of wear or overheating is also recommended.

B2B Procurement Guide

When procuring the UCC28019 in bulk, it is advisable to source from authorized distributors or directly from Texas Instruments to ensure authenticity and quality. Buyers should verify the part number and packaging (e.g., SOIC-8) to match their design requirements. Pricing may vary based on order quantity and market conditions, with volume discounts commonly available. Lead times should be confirmed in advance, especially for large orders. Buyers may also consider evaluating alternative PFC controllers if specific features or cost targets are not met by the UCC28019.