UC3854DWTR-FG4

Overview

The UC3854DWTR-FG4 is a high power-factor preregulator integrated circuit manufactured by Texas Instruments. It functions as a bipolar CCM PFC controller designed to support line frequencies across the 50Hz to 400Hz range. The component operates within an ambient temperature range of 0°C to 70°C and is housed in a 16-pin SOIC (DW) package. This device is engineered for applications requiring efficient power factor correction in pre-regulator stages.

Feature Summary

• Supports continuous conduction mode (CCM) power factor correction
• Operates across wide line frequency ranges from 50Hz to 400Hz
• Designed for high power-factor preregulator applications

Applications

• Power factor correction pre-regulators
• AC-DC power supply input stages
• Industrial power conditioning systems

Procurement Notes

Verify availability status carefully, as this specific suffix variant may be discontinued or obsolete. Confirm exact pinout and electrical specifications against current official datasheets before integration. Ensure compatibility with existing PCB footprints and thermal management requirements. Check for newer replacement components if long-term supply is required.

Selection Notes

Select this component for designs requiring robust CCM PFC control with wide input frequency tolerance. Consider the SOIC-16 package constraints for thermal dissipation and board space. Evaluate alternative active devices if discontinuation impacts production timelines. Verify that the operating temperature range meets the specific environmental conditions of the target application.

Part Context

This part belongs to the UC3854 series of power factor controllers from Texas Instruments. The DWTR suffix indicates a tape-and-reel packaging format suitable for automated assembly processes. The FG4 suffix typically denotes specific manufacturing or compliance variations within the product line, though detailed differentiation requires official documentation.

Replacement Considerations

Public records indicate the UC3854DWTR-FG4 is discontinued and no longer carried by major distributors like DigiKey. Engineers should consult Texas Instruments for current equivalent parts or updated series replacements that maintain similar CCM PFC functionality and package dimensions.