UC2854BDW

Overview

The UC2854BDW is an advanced high-power factor preregulator integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 10 V to 20 V and supports switching frequencies up to 115 kHz. The device is housed in a 16-pin SOIC package with surface mount installation. It functions within a temperature range of -40°C to +85°C, drawing a startup current of approximately 0.3 mA and a maximum operating supply current of 18 mA.

Feature Summary

• Implements average current mode control for power factor correction applications
• Integrates zero power detection capability for efficient light-load operation
• Features internal pulse width modulation logic for precise duty cycle regulation

Applications

• High-power factor preregulators in AC-DC power supplies
• Power factor correction stages for industrial equipment
• Offline converter input stages requiring compliance with harmonic standards

Procurement Notes

Verify the specific suffix 'DW' confirms the tube packaging format rather than tape-and-reel variants like 'TR'. Confirm the manufacturer part number matches Texas Instruments documentation exactly. Check for RoHS compliance status as indicated in official datasheets. Ensure the SOIC-16 package dimensions align with your PCB footprint requirements. Validate that the operating temperature range meets your environmental specifications.

Selection Notes

Select this component when designing systems requiring average current mode PFC control with a maximum switching frequency of 115 kHz. It is suitable for applications needing a 16-pin SOIC package and operation between -40°C and +85°C. Consider alternatives if higher switching frequencies or different package types are required. Verify compatibility with external passive components for the intended power level.

Part Context

The UC2854BDW belongs to the UC2854 family of advanced high-power factor preregulators from Texas Instruments. This series is designed to improve input current waveform quality relative to the input voltage. It serves as a specialized power management IC within the broader PMIC category, focusing specifically on AC-DC conversion efficiency and harmonic reduction.

Replacement Considerations

Publicly confirmed substitute part numbers include UC2854BDWG4 and UC2854BDWTRG4. These variants maintain identical functional specifications but may differ in packaging or lead-free compliance details. Verify pinout compatibility before substitution.