UC2853AD

Overview

The UC2853AD is a high power factor preregulator controller from Texas Instruments, operating in average current mode. It supports switching frequencies up to 94 kHz and accepts supply voltages between 12 V and 40 V. The device features a startup current of 250 µA and operates within a temperature range of 0°C to 70°C. Packaged in an 8-pin SOIC (D) surface-mount format, it integrates essential protection mechanisms for power factor correction applications.

Feature Summary

• Implements average current mode control for precise input current shaping
• Integrates overvoltage protection circuitry
• Supports continuous conduction mode operation

Applications

• High power-factor preregulators
• Single-phase PFC systems

Procurement Notes

Verify the specific suffix 'AD' against the manufacturer's official datasheet to confirm the exact package variant and temperature rating. Ensure compatibility with the required PCB footprint for the 8-SOIC configuration. Cross-reference the part number with the latest discontinuance notifications to confirm active production status before finalizing procurement plans.

Selection Notes

Select this component when designing single-phase power factor correction circuits requiring average current mode control. It is suitable for applications needing integrated overvoltage protection and operation within a 12 V to 40 V supply range. Consider the 0°C to 70°C operating temperature limit during thermal design.

Part Context

The UC2853 belongs to the UC385x series of power factor correction controllers. It serves as a specialized solution for improving power quality in AC-DC conversion stages. The device complements other UC-series controllers by offering dedicated features for sinusoidal input current regulation and power limiting.

Replacement Considerations

UC2853DTRG4, UC3853DTRG4, and UC2853 are documented related components.