UC2853N

Overview

The UC2853N is a high power-factor preregulator from Texas Instruments, designed for continuous conduction mode (CCM) single-phase power factor correction. It operates with a maximum switching frequency of 115 kHz and supports an operating supply voltage up to 40 V. The device draws an operating supply current of 10 mA and functions within a temperature range of -25°C to +85°C. Packaged in a PDIP-8 through-hole format, it integrates current-mode control capabilities with a peak current limit of 0.5 A.

Feature Summary

• Implements current-mode control for high power-factor preregulation applications
• Supports continuous conduction mode (CCM) operation
• Integrates peak current limiting functionality

Applications

• Single-phase power factor correction circuits
• High power-factor preregulators
• AC-DC power supply input stages

Procurement Notes

Verify component status as the UC2853N is listed as obsolete by Texas Instruments. Confirm availability through authorized distributors or secondary markets. Ensure substitute components meet original electrical specifications and pin compatibility requirements before integration into new designs.

Selection Notes

Select this component for legacy systems requiring CCM PFC control with specific thermal and voltage constraints. Evaluate alternative active devices if new production is required due to obsolescence. Verify package compatibility and thermal management needs for the PDIP-8 configuration during design validation.

Part Context

Part of the UC285x series of power factor controllers. Designed for AC-DC conversion efficiency improvement. Manufactured by Texas Instruments using bipolar technology. Part of the broader PMIC category focusing on power management and correction.

Replacement Considerations

• UCC28180DR

FAQ

What control method does the UC2853N utilize?

It utilizes current-mode control for continuous conduction mode (CCM) operation.

What is the maximum switching frequency?

The maximum switching frequency is 115 kHz.