UC2855BDW

Overview

The UC2855BDW is a high-performance power factor correction controller manufactured by Texas Instruments. It operates within a supply voltage range of 10 V to 20 V and supports switching frequencies up to 500 kHz. The device features an SOIC-20 surface-mount package with a wide operating temperature range from -40 °C to +85 °C. Designed for pre-regulation applications, it integrates zero-power detection capabilities to enhance efficiency in power factor correction circuits.

Feature Summary

• Integrates zero-power detection functionality to optimize performance during low-load conditions
• Supports multiple topologies including boost, flyback, forward, half bridge, and push-pull configurations
• Provides robust protection mechanisms including overvoltage and current limiting

Applications

• Power factor pre-regulation stages in AC-DC converters
• High-efficiency power supply designs requiring active PFC
• Industrial equipment power management systems

Procurement Notes

Verify the specific suffix 'BDW' corresponds to the SOIC-20 tube packaging variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected component matches the required industrial temperature grade specifications for the target application environment.

Selection Notes

Select this component for designs requiring integrated power factor correction with zero-crossing detection. Compare against the UC2854 series if lower switching frequencies or different pin counts are acceptable. Evaluate thermal requirements based on the SOIC-20 package limitations and ensure adequate PCB layout for high-frequency operation.

Part Context

This part belongs to the UC2855B family of power factor correction controllers. It serves as a specialized solution for improving input power quality in switching mode power supplies. The device complements other Texas Instruments PMIC offerings focused on efficient energy conversion and grid-compliant power delivery standards.

Replacement Considerations

Public confirmed substitute part numbers: UC2855BDWR.