UC3852D

Overview

The UC3852D is a high-power-factor preregulator controller manufactured by Texas Instruments. It integrates a PWM controller and a power factor correction (PFC) controller into a single package. The device operates with a switching frequency of approximately 25 kHz, utilizing constant on-time control to ensure input current follows the input voltage waveform. It supports boost converter topologies for AC-DC conversion applications requiring high efficiency and low noise.

Feature Summary

• Integrates PFC and PWM control functions for complete power supply design
• Enables high power factor operation through constant on-time current mode control
• Provides precise regulation for AC-DC power conversion systems

Applications

• High power factor AC-DC power supplies
• Motor speed control power systems
• Temperature control power units

Procurement Notes

Verify the specific suffix D against the official Texas Instruments datasheet to confirm pinout and thermal characteristics. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the manufacturer part number with authorized distributor listings to confirm authenticity and traceability before procurement.

Selection Notes

Select this component when designing AC-DC converters requiring integrated PFC and regulation. It is suitable for applications demanding high power factor and low harmonic distortion. Consider the operating temperature range and packaging constraints during the initial circuit design phase to ensure compatibility with the final enclosure.

Part Context

This component belongs to the UC385x series of power factor correction controllers from Texas Instruments. These devices are designed to simplify the design of high-performance AC-DC power supplies by combining multiple control loops into a single integrated circuit, reducing component count and board space.

Replacement Considerations

Public confirmed substitute part numbers: UC3852DWG4.