UC3854DWTR-F

Overview

The UC3854DWTR-F is a bipolar current-mode power factor correction (PFC) controller designed for continuous conduction mode (CCM) applications. Manufactured by Texas Instruments, this component operates within an extended line frequency range of 50 Hz to 400 Hz, supporting versatile AC input scenarios. It is housed in a 16-pin Small Outline Integrated Circuit (SOIC) package with the DW suffix and is supplied in tape-and-reel format. The device functions reliably across a commercial temperature range from 0°C to +70°C.

Feature Summary

• Supports continuous conduction mode (CCM) power factor correction control
• Operates effectively across a wide line frequency spectrum from 50 Hz to 400 Hz
• Utilizes average current mode control architecture for high performance

Applications

• High power-factor preregulators
• Universal AC-DC power supplies
• Industrial power conversion systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure compatibility with required packaging and temperature grades. Confirm that the SOIC-16 footprint matches the target PCB design. Cross-reference the part number with the latest datasheet revision to validate electrical characteristics and pinout configurations before finalizing procurement decisions.

Selection Notes

Select this component when designing CCM PFC stages requiring operation at frequencies beyond standard 50/60 Hz mains. The bipolar technology offers robust performance for preregulator topologies. Ensure thermal management strategies align with the specified 0°C to +70°C operating range. Evaluate system requirements against the 200 kHz switching capability typical of the UC3854 family.

Part Context

This part belongs to the UC3854 series of high power-factor preregulators from Texas Instruments. The series includes variants such as the UC3854ADWTR and UC3854BDW, which share similar functional architectures but may differ in temperature ranges or specific electrical tolerances. The DWTR-F designation indicates a specific manufacturing lot or variant within the SOIC-16 surface-mount category.

Replacement Considerations

Compatible substitutes include UC3854DWTR and UC3854ADWTR. Verify pin-to-pin compatibility and ensure the alternative part meets the specific 50 Hz to 400 Hz line frequency requirement. Check for any differences in the operating temperature range or packaging specifications.