UC2866NG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance power factor correction controller
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: Efficiently manages power factor correction in electronic devices
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 85VAC to 265VAC
• Output Voltage: Adjustable, typically 385VDC
• Operating Frequency: 100kHz to 500kHz
• Maximum Duty Cycle: 95%
• Protection Features: Overvoltage protection, overcurrent protection, and thermal shutdown

Detailed Pin Configuration

1. VCC: Power supply input
2. COMP: Compensation pin for feedback control
3. FB: Feedback voltage input
4. CS: Current sense input
5. INV: Inverting input for error amplifier
6. RT: Timing resistor connection for oscillator frequency
7. CT: Timing capacitor connection for oscillator frequency
8. GND: Ground reference
9. VREF: Reference voltage output
10. OSC: Oscillator output
11. SYNC: Synchronization input
12. UVLO: Undervoltage lockout input
13. OVP: Overvoltage protection input
14. OCP: Overcurrent protection input
15. SD: Shutdown input
16. HV: High-voltage output

Functional Features

• High-performance power factor correction (PFC) controller
• Provides active power factor correction for improved energy efficiency
• Enables compliance with international power quality standards
• Supports wide input voltage range for universal compatibility
• Offers adjustable output voltage for various applications
• Incorporates protection features to ensure safe operation
• Allows synchronization with an external clock for system integration
• Provides undervoltage lockout and shutdown capabilities

Advantages and Disadvantages

Advantages

• Efficient power factor correction improves energy efficiency
• Compliance with international power quality standards
• Wide input voltage range ensures universal compatibility
• Adjustable output voltage for versatile applications
• Protection features enhance safety during operation
• Synchronization capability allows system integration

Disadvantages

• Requires additional external components for complete power factor correction implementation
• Limited to DIP-16 package, which may not be suitable for space-constrained designs

Working Principles

UC2866NG4 is a high-performance power factor correction controller designed to improve the power factor of electronic devices. It operates by actively adjusting the input current waveform to align with the input voltage waveform, thereby reducing reactive power consumption and improving energy efficiency.

The controller utilizes an error amplifier, oscillator, and feedback loop to regulate the output voltage and maintain power factor correction. It continuously monitors the input voltage and current, adjusting the duty cycle of the power switch to achieve the desired output voltage and power factor.

Detailed Application Field Plans

UC2866NG4 is widely used in various electronic devices that require efficient power factor correction. Some common application fields include:

1. Power supplies for computers and servers
2. LED lighting systems
3. Industrial motor drives
4. Battery chargers
5. Audio amplifiers
6. Home appliances

Detailed and Complete Alternative Models

1. UC3856: High-performance power factor correction controller with enhanced features
2. UC28025: Power factor correction controller optimized for low-power applications
3. UC2854: Power factor correction controller with integrated boost converter
4. UC3825: High-speed PWM controller with power factor correction capability
5. UC3875: Advanced power factor correction controller with digital control interface

These alternative models offer similar functionality and can be considered based on specific application requirements.

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