UCC2818DW

Overview

The UCC2818DW is a BiCMOS power factor preregulator controller manufactured by Texas Instruments. It operates in average current mode to achieve high power factor and low total harmonic distortion. The device supports switching frequencies up to 250 kHz and functions within a supply voltage range of 12 V to 17 V. It features an integrated soft-start circuit, cycle-by-cycle current limiting, and undervoltage lockout. The component is housed in a 16-SOIC package and is designed for surface-mount installation.

Feature Summary

• BiCMOS technology implementation for efficient power factor correction
• Average current mode control architecture for precise regulation
• Integrated protection mechanisms including soft-start and current limiting

Applications

• Offline power supplies requiring high power factor
• AC-DC converter preregulation stages
• Power factor correction circuits for consumer electronics

Procurement Notes

Verify the specific suffix 'DW' corresponds to the standard commercial grade SOIC-16 package configuration. Confirm RoHS compliance status through official documentation as manufacturing updates may occur. Ensure compatibility with existing PCB footprints and thermal management requirements before finalizing procurement orders.

Selection Notes

Select this component when average current mode PFC is required for improved performance over fixed-frequency controllers. Consider the 250 kHz maximum switching frequency for balancing efficiency and EMI. Evaluate the 16-SOIC package constraints against available board space and thermal dissipation capabilities for the target application environment.

Part Context

This part belongs to the UCC2818 family of BiCMOS power factor preregulators from Texas Instruments. It serves as a specialized controller for AC-DC conversion systems aiming to meet regulatory standards for harmonic distortion. The device integrates essential control logic into a single chip to simplify design complexity.

Replacement Considerations

UCC2818ADG4 is a verified equivalent variant within the same product family offering identical electrical characteristics.