UCC2818DWTR

Overview

The UCC2818DWTR is a BiCMOS power factor preregulator controller from Texas Instruments, designed for average current mode control in continuous conduction mode (CCM). It operates with a programmable switching frequency ranging from 6 kHz to 220 kHz. The device features an integrated 1.5 A source and 2 A sink peak gate driver output, internally clamped at 15.2 V typical, enabling fast turn-on and turn-off of external power switches without requiring buffer circuits. It supports universal AC input systems from 100 W to several kilowatts.

Feature Summary

• Implements average current mode control for high power factor and low current distortion
• Features integrated high-current gate driver with internal voltage clamping
• Supports flexible switching frequency programming across a wide range

Applications

• Universal AC input CCM boost PFC converters
• Server and desktop computer power supplies
• Large household appliances such as air conditioners and refrigerators
• Industrial power supply DIN rails
• Flat panel displays including plasma, LCD, and LED televisions

Procurement Notes

Verify the specific suffix 'DWTR' indicates the tape and reel packaging format distinct from tube variants like 'DW'. Confirm the component meets RoHS compliance standards required for your assembly process. Ensure the operating temperature range aligns with your system's thermal design constraints before finalizing procurement.

Selection Notes

Select this component when designing CCM PFC stages requiring average current mode control for superior line regulation. The integrated gate driver simplifies layout by reducing external component count. Consider the 6 kHz to 220 kHz frequency range to optimize magnetic component size versus switching losses for your specific power level.

Part Context

This part belongs to the UCC2818A family of power factor correction controllers. It shares functional similarities with other Texas Instruments PFC solutions but is distinguished by its specific package configuration and drive capabilities. It serves as a core control element in AC-DC front-end designs aiming for efficiency and compliance with harmonic emission standards.

Replacement Considerations

Direct substitutes within the same family include UCC2818ADWTR. Verify pin compatibility and electrical specifications against legacy parts like UCC3818A if migrating existing designs.