UC3872N

The UC3872N is a high performance power factor controller designed for use in power supply applications. It provides features such as power factor correction and voltage feedforward compensation, making it ideal for improving power efficiency and stability in power supply systems.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• VIN: Input Voltage
• VSENSE: Voltage Feedback Input
• VCC: Positive Power Supply
• RT/CT: Timing Resistor/Capacitor
• COMP: Compensation pin
• FB: Feedback Pin
• GD: Gate Driver Output
• HO: High-Side Gate Output
• LO: Low-Side Gate Output
• RTN: Timing Resistor/Capacitor Ground
• VREF: Reference Voltage

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the UC3872N for visual representation.

Key Features

• Power Factor Correction: Implements power factor correction to optimize power efficiency.
• Voltage Feedforward Compensation: Provides voltage feedforward compensation for improved stability.
• High Performance: Offers high performance in power supply applications.
• Wide Operating Voltage Range: Operates within a wide voltage range for versatile applications.
• Protection Features: Includes protection features for overcurrent and overvoltage conditions.

Note: For detailed technical specifications, please refer to the UC3872N datasheet.

Application

• Switched-Mode Power Supplies: Suitable for use in switched-mode power supply designs.
• AC-DC Converters: Ideal for improving power factor and stability in AC-DC converter applications.
• Power Systems: Used in various power systems requiring power factor correction and compensation.

Functionality

The UC3872N is a high performance power factor controller that enhances power efficiency and stability in power supply systems through power factor correction and voltage feedforward compensation.

Usage Guide

• Input Voltage: Connect VIN (Pin 1) to the input voltage source.
• Voltage Feedback: Connect VSENSE (Pin 2) for voltage feedback to regulate the output.
• Power Supply: Provide positive power supply to VCC (Pin 3).
• Gates Control: Utilize GD (Pin 6), HO (Pin 7), and LO (Pin 8) for gate driver control.

Frequently Asked Questions

Q: What is the purpose of power factor correction in the UC3872N?
A: Power factor correction in the UC3872N helps optimize power efficiency by reducing reactive power consumption.

Q: Does the UC3872N provide protection against overcurrent conditions?
A: Yes, the UC3872N includes protection features to safeguard against overcurrent situations, ensuring system reliability.