UCC2818PW

Overview

The UCC2818PW is a BiCMOS power factor preregulator designed for high-performance AC-DC conversion. It operates with a fixed switching frequency of 250 kHz and supports an operating temperature range from -40°C to +85°C. The device is housed in a 16-pin PW (SOIC-Narrow) surface-mount package. It draws a typical supply current of 150 µA, ensuring efficient standby performance. This component functions as a critical element in power factor correction circuits, managing input current waveform shaping to meet regulatory standards.

Feature Summary

• Implements average current mode control for precise power factor correction
• Features low quiescent supply current for energy-efficient operation
• Provides integrated protection mechanisms against overvoltage and undervoltage conditions

Applications

• Universal AC-DC power supplies
• Computer peripheral power adapters
• Telecommunications equipment power stages

Procurement Notes

Verify the specific suffix 'PW' confirms the 16-pin SOIC-Narrow package variant. Confirm RoHS compliance status through the official datasheet or manufacturer documentation. Ensure the intended application environment remains within the specified -40°C to +85°C operational temperature limits for reliable performance.

Selection Notes

Select this component when a fixed 250 kHz switching frequency is required for EMI management. It is suitable for designs prioritizing low standby power consumption due to its microamp-level supply current. Consider the narrow SOIC package constraints for PCB layout density requirements.

Part Context

This part belongs to the UCC2818A family of BiCMOS power factor preregulators. It serves as a dedicated controller for boost PFC topologies, distinguishing itself from general-purpose PWM controllers by offering specialized input conditioning and current shaping features tailored for mains-powered applications.

Replacement Considerations

UCC2818D offers the same functionality in a standard SOIC-16 package. UCC2818AN provides a through-hole PDIP-16 option. Verify pinout compatibility before substituting.