UC2854BDWTRG4

Overview

The UC2854BDWTRG4 is an enhanced high-power factor preregulator controller from Texas Instruments, designed for average current mode control. It operates within a supply voltage range of 10 V to 20 V and supports switching frequencies up to 200 kHz. The device functions reliably across an extended temperature range of -40°C to +85°C. Packaged in a 16-pin SOIC surface-mount format, it integrates essential protection features including zero-power detection and soft-start capabilities.

Feature Summary

• Implements average current mode control architecture for precise power factor correction
• Integrates zero-power detection functionality to minimize input current distortion at low line voltages
• Includes internal soft-start circuitry to limit inrush current during startup sequences

Applications

• High-performance power factor correction preregulators
• Universal AC-DC power supplies
• Telecommunications power systems

Procurement Notes

Verify the specific suffix 'TRG4' indicates tape-and-reel packaging with lead-free composition. Confirm the 'B' grade designation aligns with required operational temperature ranges. Ensure compatibility with existing PCB footprints for the 16-SOIC package. Validate that the manufacturer's datasheet specifications match the intended system requirements before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring average current mode PFC control with integrated zero-crossing detection. It is suitable for applications needing operation up to 200 kHz switching frequency. Consider the 16-SOIC package constraints for thermal management. Verify that the 10 V to 20 V supply range matches the auxiliary power design.

Part Context

This part belongs to the UC2854 family of power factor correction controllers. It serves as an enhanced version of earlier models, offering improved performance characteristics. The device is manufactured by Texas Instruments and falls under the PMIC category. It is distinct from the UC3854 series which may have different electrical specifications.

Replacement Considerations

UC2854ADWTRG4

FAQ

What control mode does the UC2854BDWTRG4 utilize?

It utilizes average current mode control for power factor correction.

Does the device include protection against inrush current?

Yes, it features an internal soft-start mechanism to manage startup currents.