UCC2819N

Overview

The UCC2819N is a BiCMOS power factor preregulator controller manufactured by Texas Instruments. It operates in continuous conduction mode to achieve high power factor and low total harmonic distortion. The device integrates a precision multiplier, error amplifier, and PWM comparator. It supports a switching frequency of 250 kHz and functions within an operating temperature range of -40°C to +85°C. The component is housed in a 16-pin SOIC-Narrow package and draws a typical supply current of 150 µA.

Feature Summary

• BiCMOS technology implementation for enhanced performance
• Integrated precision analog multiplier for input shaping
• Continuous conduction mode control architecture

Applications

• Offline power supplies requiring high power factor
• Universal AC-DC converter designs
• Power factor correction stages in consumer electronics

Procurement Notes

Verify the specific suffix 'N' indicates the PDIP package variant rather than the DG4 tape-and-reel option. Confirm availability status as distribution channels may list this part as obsolete or limited stock due to lifecycle changes. Ensure compatibility with existing PCB footprints for 16-pin DIP configurations during sourcing.

Selection Notes

Select this component for applications requiring integrated PFC control without external discrete multipliers. Consider the 16-pin DIP package for through-hole assembly requirements. Evaluate thermal management needs based on the SOIC/Narrow package constraints if alternative packages are considered. Verify input voltage ranges match the target application specifications.

Part Context

This part belongs to the UCC2819A series of power factor correction controllers. It serves as a legacy solution for continuous conduction mode PFC applications. The series is designed to simplify design implementation by integrating essential PFC functions into a single IC. It precedes newer generations of critical conduction mode controllers in the manufacturer's portfolio.

Replacement Considerations

Check for direct pin-compatible upgrades within the UCC2819 family. Review datasheets for newer CCM PFC controllers from Texas Instruments that offer improved efficiency or lower standby power. Validate electrical parameter equivalence before substituting with other manufacturers' parts.