UC2872DW

Overview

The UC2872DW is a current-mode PWM controller designed for high-performance power factor correction (PFC) applications. It operates within a switching frequency range of 57kHz to 78kHz and supports a supply voltage from 4.5V to 24V. The device features an internal oscillator, error amplifier, and multiplier for precise control. It is housed in a 16-SOIC package with a width of 7.50mm and is rated for operation between 0°C and 70°C.

Feature Summary

• Integrates a multiplier and error amplifier for continuous conduction mode PFC
• Includes internal oscillator with external synchronization capability
• Provides undervoltage lockout and soft-start functionality

Applications

• Power factor correction stages in AC-DC converters
• High-efficiency switched-mode power supplies
• Industrial power supply systems requiring compliance standards

Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout compatibility and electrical specifications. Confirm RoHS3 compliance status as indicated in official documentation. Ensure the operating temperature range meets system requirements before integration.

Selection Notes

Select this component for designs requiring active power factor correction with fixed frequency operation. Consider the 16-pin SOIC footprint for layout constraints. Evaluate the input voltage range against the system's rectified line voltage to ensure stable operation under all conditions.

Part Context

This part belongs to the UC2872 family of power factor controllers. It serves as a core control element in offline power supplies, enabling improved efficiency and reduced harmonic distortion compared to passive filtering solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.