UC3872DWG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance power factor correction controller
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Efficiently converts AC input to regulated DC output
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 85VAC to 265VAC
• Output Voltage Range: 380VDC to 400VDC
• Maximum Output Power: 300W
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage: 10V to 20V

Detailed Pin Configuration

1. VCC: Supply voltage pin
2. GND: Ground reference pin
3. COMP: Compensation pin for feedback control
4. FB: Feedback pin for regulating the output voltage
5. CS: Current sense pin for monitoring the load current
6. RT/CT: Timing components connection pin
7. INV: Inverting input pin for error amplifier
8. VREF: Reference voltage pin for error amplifier
9. OSC: Oscillator timing capacitor connection pin
10. DTC: Duty cycle control pin
11. CT: Timing capacitor connection pin
12. RT: Timing resistor connection pin
13. SD: Shutdown pin for enabling/disabling the device
14. OUT: Output pin for regulated DC voltage

Functional Features

• High power factor correction (PFC) performance
• Wide input voltage range for universal compatibility
• Accurate regulation of output voltage
• Overvoltage and undervoltage protection
• Overcurrent protection with adjustable threshold
• Soft-start function for smooth power-up
• Low standby power consumption

Advantages

• Improved power factor and efficiency
• Enhanced reliability and stability
• Compact size and easy integration
• Cost-effective solution for power management

Disadvantages

• Requires external components for complete functionality
• Limited output power capability compared to higher-end models

Working Principles

The UC3872DWG4 is a high-performance power factor correction controller designed to improve the efficiency of AC-to-DC power conversion. It operates by regulating the input current waveform to achieve a near-unity power factor, reducing harmonic distortion, and improving overall system performance.

The device utilizes an error amplifier, voltage reference, oscillator, and control logic to monitor the input voltage and regulate the output voltage. By adjusting the duty cycle of the internal power switch, it controls the energy transfer from the input source to the output load, ensuring stable and efficient power delivery.

Detailed Application Field Plans

The UC3872DWG4 is widely used in various applications that require power factor correction and efficient power management. Some common application fields include:

1. Switched-mode power supplies (SMPS)
2. LED lighting systems
3. Industrial motor drives
4. Renewable energy systems
5. Electric vehicle charging stations

Detailed and Complete Alternative Models

1. UC3854: High-performance power factor correction controller with additional features such as brownout protection and adjustable frequency operation.
2. UC3825: Advanced power factor correction controller with integrated MOSFET driver and comprehensive protection features.
3. UC3846: Power factor correction controller specifically designed for off-line power supplies with enhanced transient response.

These alternative models offer different capabilities and features, catering to specific requirements and applications within the power management domain.

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