FAN7311M

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High-performance power factor correction (PFC) controller - Designed for use in AC/DC power supplies - Provides high efficiency and low total harmonic distortion (THD) - Enables compliance with international power quality standards

Package: SOP-8 (Small Outline Package)

Essence: The FAN7311M is a specialized IC that controls the power factor correction in AC/DC power supplies. It ensures efficient power conversion while minimizing harmonic distortion.

Packaging/Quantity: The FAN7311M is typically sold in reels, with each reel containing 2500 units.

Specifications

• Input Voltage Range: 85VAC to 265VAC
• Output Voltage Range: 400VDC to 800VDC
• Operating Frequency: 65kHz to 115kHz
• Maximum Duty Cycle: 95%
• Startup Current: 100μA (typical)
• Operating Temperature Range: -40°C to +105°C

Pin Configuration

The FAN7311M has eight pins arranged as follows:

```

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| | --| VCC |-- --| GND |-- --| FB |-- --| CS |-- --| COMP |-- --| INV |-- --| HV |-- |_______| ```

1. VCC: Power supply voltage input
2. GND: Ground reference
3. FB: Feedback pin for voltage regulation
4. CS: Current sense input pin
5. COMP: Compensation pin for loop stability
6. INV: Inverting input of the error amplifier
7. HV: High-voltage output
8. NC: No connection (not internally connected)

Functional Features

• High power factor correction (PFC) performance
• Wide input voltage range for universal compatibility
• Low total harmonic distortion (THD)
• Overvoltage protection
• Overcurrent protection
• Soft-start function for smooth power-up
• Internal leading-edge blanking (LEB) for improved noise immunity

Advantages and Disadvantages

Advantages: - Efficient power factor correction - Compliance with international power quality standards - Wide input voltage range - Built-in protection features - Smooth power-up with soft-start function

Disadvantages: - Limited to power management applications - Requires additional components for a complete power supply design

Working Principles

The FAN7311M operates by controlling the power factor correction in AC/DC power supplies. It uses a feedback mechanism to regulate the output voltage and maintain high efficiency. By adjusting the duty cycle of the internal power switch, it ensures that the input current waveform follows the shape of the input voltage waveform, resulting in a high power factor.

Detailed Application Field Plans

The FAN7311M is commonly used in various power management applications, including:

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

Detailed and Complete Alternative Models

1. FAN7311MX: Similar to FAN7311M but offered in a different package (e.g., DIP-8)
2. FAN7311N: Enhanced version with additional protection features
3. FAN7311P: Lower-cost variant with reduced functionality

These alternative models provide similar power factor correction capabilities and can be considered based on specific application requirements.

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