UC2854N

Overview

The UC2854N is a high-power factor preregulator controller manufactured by Texas Instruments. It operates within a supply voltage range of 10 V to 20 V and supports switching frequencies up to 200 kHz. The device functions across an extended temperature range from -40 °C to +85 °C. Designed for through-hole mounting, it utilizes a 16-pin PDIP package. The component draws a typical operating supply current of 1.5 mA.

Feature Summary

• Implements average current mode control for power factor correction applications
• Integrates zero-power detection capability to enhance efficiency at light loads
• Features built-in soft-start functionality to manage inrush currents during startup

Applications

• High-power factor pre-regulators
• Offline AC-DC power supplies
• Universal input power conversion systems

Procurement Notes

Verify the specific suffix 'N' confirms the through-hole PDIP-16 package variant. Confirm RoHS compliance status via the official datasheet. Ensure the ordering part number matches the required industrial temperature grade specifications.

Selection Notes

Select this component when a through-hole solution is required for PFC designs. Compare against the UC3854N for commercial temperature range requirements. Evaluate the UC2854ADWTR for surface-mount assembly needs.

Part Context

This part belongs to the UC2854 family of advanced high-power factor preregulators. It serves as a legacy through-hole alternative to surface-mount variants like the UC2854ADWTR. The series is designed for universal line operation with integrated control loops.

Replacement Considerations

UC3854N: Commercial temperature grade equivalent. UC2854ADWTR: Surface-mount SOIC-16 equivalent.