UC2854BDWTR

Overview

The UC2854BDWTR is an enhanced high-power factor preregulator from Texas Instruments, designed for average current mode power factor correction. It operates within a supply voltage range of 10V to 20V and supports switching frequencies between 80kHz and 120kHz. The device features a low operating supply current of 250µA and includes integrated zero-power detection capabilities. Packaged in a 16-pin SOIC format, it functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Implements average current mode control for precise sinusoidal input shaping
• Integrates zero-power detection to minimize standby power consumption
• Provides internal compensation and protection circuitry for simplified design

Applications

• High-performance power factor preregulators
• AC-DC power supplies with strict harmonic distortion limits
• Universal input offline power converters

Procurement Notes

Verify the specific suffix 'DWTR' confirms the tape-and-reel packaging variant rather than tube packaging. Confirm the component meets RoHS3 compliance standards required for your assembly process. Check moisture sensitivity level (MSL) ratings to ensure proper storage and reflow soldering profiles are followed during manufacturing.

Selection Notes

Select this component when designing systems requiring average current mode PFC control with extended industrial temperature ranges. It serves as a direct upgrade path for legacy UC3854 designs needing improved thermal performance. Ensure the target application frequency falls within the 80kHz to 120kHz operational window for optimal efficiency.

Part Context

This part belongs to the UC2854 family of advanced power factor correction controllers. It shares architectural similarities with the UC3854 series but offers enhanced specifications including wider operating temperature ranges and optimized current mode control characteristics for modern power supply applications.

Replacement Considerations

UC3854BDW is a compatible alternative within the same functional family, though it typically features a commercial temperature range instead of the industrial range specified for the UC2854BDWTR.