UC2853AN

Overview

The UC2853AN is a high power factor preregulator controller manufactured by Texas Instruments. It operates within an industrial temperature range of 0°C to 70°C and utilizes a PDIP-16 package. The device supports continuous conduction mode (CCM) average current mode control for single-phase power factor correction applications. Key electrical specifications include a maximum operating supply voltage of 40 V, a startup current of 0.25 mA, and an operating supply current of 10 mA. The unit features UVLO thresholds set at 11.5 V for turn-on and 9.5 V for turn-off, with a practical maximum operating frequency of 115 kHz.

Feature Summary

• Implements average current mode control for sinusoidal input shaping
• Provides overvoltage protection capabilities
• Supports single-phase power factor correction topologies

Applications

• High power factor preregulator circuits
• Single-phase AC-DC power conversion systems
• Industrial power supply front ends

Procurement Notes

Verify the specific suffix 'AN' corresponds to the PDIP-16 through-hole package and the 0°C to 70°C commercial temperature grade. Confirm that the component matches the catalog rating rather than the military or extended temperature variants. Ensure the ordering information aligns with the manufacturer's current active status for this specific package and temperature combination.

Selection Notes

Select the UC2853AN when designing single-phase PFC stages requiring average current mode control within a commercial temperature environment. This component is suitable for applications needing a 40 V maximum supply capability and standard through-hole integration. Consider alternative UC2853 variants if operation below 0°C or in surface-mount configurations is required.

Part Context

The UC2853 belongs to the UC285x family of power factor correction controllers from Texas Instruments. These devices are engineered to improve line current distortion and efficiency in AC-DC converters. The UC2853 specifically targets single-phase applications, offering integrated control loops for power limiting and sinusoidal input current generation without external complex compensation networks.

Replacement Considerations

Public confirmed substitutes include UC2853DTRG4, UC3853, and UC3853DTRG4. Verify package compatibility and temperature range differences when substituting.