UC2854DW

Overview

The UC2854DW is an advanced high-power factor preregulator integrated circuit manufactured by Texas Instruments. It operates in a surface-mount SOIC-16 package and supports average current mode control for power factor correction applications. The device functions within a supply voltage range of 10V to 20V and maintains operation across a temperature range of -40°C to +85°C. Key electrical specifications include a switching frequency capability up to 200kHz, a maximum source current of 14µA, and a startup supply current of 1.5mA. The component integrates zero-power detection features and is designed for efficient AC-DC conversion stages.

Feature Summary

• Implements average current mode control architecture for precise power factor correction
• Integrates zero-power detection functionality to enhance efficiency at low loads
• Supports multiple converter topologies including boost, buck, flyback, and forward configurations

Applications

• Power factor correction (PFC) pre-regulators
• AC-DC power supply input stages
• High-efficiency offline converter designs

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm exact package dimensions and thermal characteristics. Ensure compatibility with your PCB footprint design, as the SOIC-16 package requires precise soldering parameters. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement decisions.

Selection Notes

Select this component when designing systems requiring average current mode PFC control with moderate switching frequencies. Consider the 10V to 20V operating voltage range and the -40°C to +85°C temperature limits during system planning. Evaluate the 14µA source current capability against gate drive requirements for external MOSFETs in your specific topology.

Part Context

This part belongs to the UC2854 family of power factor controllers from Texas Instruments. It serves as a specialized solution for improving power quality in electronic equipment by correcting the phase difference between voltage and current. The device is distinct from general PWM controllers by its dedicated PFC algorithms and internal compensation networks tailored for preregulator applications.

Replacement Considerations

Consult official substitution guides for compatible alternatives such as the UC3854 or UCC2854 series variants. Verify pinout compatibility and electrical parameter overlaps before replacing the UC2854DW with other components in existing designs.