UC3855BDW

Overview

The UC3855BDW is a high-performance power factor correction (PFC) 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 500 kHz. The device is housed in a 20-pin SOIC surface-mount package with an operating temperature range from 0°C to +70°C. It features a low quiescent supply current of 150 µA, facilitating efficient power management in pre-regulator applications.

Feature Summary

• Integrated control for high-performance power factor correction preregulators
• Supports switching frequencies up to 500 kHz for compact magnetic design
• Low quiescent supply current reduces standby power consumption

Applications

• Power factor correction preregulators
• AC-DC power supplies
• Power management systems

Procurement Notes

Verify the specific suffix 'DW' confirms the SOIC-20 surface-mount package variant. Confirm RoHS compliance status through official documentation. Ensure the operating environment remains within the specified 0°C to +70°C range. Check for moisture sensitivity classification requirements during storage and handling.

Selection Notes

Select this component when a 20-pin surface-mount PFC controller is required. Consider the 500 kHz maximum frequency for higher density designs. Verify compatibility with the 10 V to 20 V supply range. Compare against other UC3855 variants if through-hole packaging or extended temperature ranges are needed.

Part Context

This part belongs to the UC3855B series of power factor correction controllers. It serves as a specialized solution for improving input power quality in AC-DC conversion stages. The device integrates essential control loops for preregulator topologies, distinguishing it from general-purpose PWM controllers.

Replacement Considerations

Public confirmed substitute: UC3855BN.