UC3872MTR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance power factor correction controller
• Package: Surface Mount Technology (SMT)
• Essence: Efficiently manages power factor correction in electronic devices
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 85V to 265V AC
• Output Voltage Range: 380V to 400V DC
• Maximum Output Power: 300W
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-16

Detailed Pin Configuration

1. VCC: Power supply voltage input
2. GND: Ground reference
3. COMP: Compensation pin for feedback control loop
4. FB: Feedback pin for output voltage regulation
5. CS: Current sense pin for current limit protection
6. RT: Timing resistor pin for frequency control
7. CT: Timing capacitor pin for frequency control
8. INV: Inverting input of the error amplifier
9. NONINV: Non-inverting input of the error amplifier
10. OSC: Oscillator timing capacitor pin
11. SS: Soft-start pin for controlled startup
12. UVLO: Undervoltage lockout pin
13. OVP: Overvoltage protection pin
14. VREF: Reference voltage output
15. VSENSE: Voltage sense pin for output voltage regulation
16. VFB: Voltage feedback pin for output voltage regulation

Functional Features

• High-performance power factor correction (PFC) controller
• Wide input voltage range for universal compatibility
• Precise output voltage regulation for stable operation
• Current limit protection for enhanced safety
• Soft-start feature for controlled startup
• Undervoltage lockout and overvoltage protection for device protection

Advantages and Disadvantages

Advantages

• Efficient power factor correction
• Wide input voltage range
• Precise output voltage regulation
• Enhanced safety with current limit protection
• Controlled startup with soft-start feature
• Device protection with undervoltage lockout and overvoltage protection

Disadvantages

• Limited maximum output power (300W)
• Operating temperature range may not be suitable for extreme environments

Working Principles

The UC3872MTR is a high-performance power factor correction controller designed to improve the efficiency of electronic devices. It operates by regulating the input current waveform to achieve a near-unity power factor. By actively managing the power factor, the UC3872MTR reduces energy losses and improves overall system efficiency.

The controller utilizes an error amplifier, feedback loop, and timing components to regulate the output voltage and maintain stability. It also incorporates various protection features such as current limit protection, undervoltage lockout, and overvoltage protection to ensure safe operation.

Detailed Application Field Plans

The UC3872MTR is commonly used in power supply applications where power factor correction is required. It finds extensive use in:

1. Switching Power Supplies
2. LED Lighting Systems
3. Industrial Motor Drives
4. Renewable Energy Systems
5. Electric Vehicle Chargers

Detailed and Complete Alternative Models

1. UC3872N: DIP-16 package, similar specifications
2. UC3852MTR: SOIC-16 package, higher maximum output power
3. UC2862MTR: SOIC-16 package, lower maximum output power

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

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