UCC2818D

Overview

The UCC2818D is a BiCMOS power factor preregulator designed for average current mode control. 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 SOIC-Narrow package and draws a typical supply current of 150 µA. It functions as a high-performance solution for AC-DC power supplies requiring efficient power factor correction.

Feature Summary

• Implements average current mode control architecture for precise regulation
• Utilizes BiCMOS technology to achieve low standby power consumption
• Provides integrated protection mechanisms against overvoltage and undervoltage conditions

Applications

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

Procurement Notes

Verify the specific suffix 'D' indicates the standard commercial temperature grade variant. Confirm the package type matches the required PCB footprint. Ensure compatibility with the target system's voltage requirements before integration.

Selection Notes

Select this component for designs requiring fixed-frequency operation without external clock synchronization needs. It is suitable for applications prioritizing low quiescent current and compact form factors within the SOIC-16 constraint.

Part Context

This part belongs to the UCC2818 family of power factor correction controllers. It serves as a foundational component for pre-regulation stages in offline power conversion topologies, offering a balance between performance and simplicity for general-purpose industrial and consumer electronics.

Replacement Considerations

Check for UCC2818AD or UCC2818AQDRQ1 variants if extended temperature ranges or automotive qualification are required. Verify pinout compatibility when substituting with other average current mode PFC controllers.