FAN7317BM

Overview

Product Category

FAN7317BM belongs to the category of integrated circuits (ICs) specifically designed for power factor correction (PFC) applications.

Use

The FAN7317BM IC is primarily used in electronic devices that require efficient power management and improved power factor correction. It helps regulate the input current waveform, ensuring a near-unity power factor and reducing harmonic distortion.

Characteristics

• High efficiency: The FAN7317BM offers high power conversion efficiency, resulting in reduced energy consumption and improved overall performance.
• Compact package: This IC is available in a small form factor package, making it suitable for space-constrained applications.
• Wide operating voltage range: The FAN7317BM can operate within a wide voltage range, providing flexibility in various power supply designs.
• Robust protection features: It incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe operation and preventing damage to the device.

Package and Quantity

The FAN7317BM is typically packaged in a compact SOP-8 (Small Outline Package) or DIP-8 (Dual Inline Package). It is commonly available in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 85VAC - 265VAC
• Output Voltage Range: 380VDC - 400VDC
• Maximum Output Power: 200W
• Operating Frequency: 50Hz - 60Hz
• Total Harmonic Distortion: <5%
• Efficiency: >90%

Pin Configuration

The FAN7317BM IC has eight pins arranged in a specific configuration:

1. VCC: Power supply input pin.
2. GND: Ground reference pin.
3. FB: Feedback pin for regulating the output voltage.
4. COMP: Compensation pin for stability control.
5. CS: Current sense pin for monitoring the input current.
6. VSENSE: Voltage sense pin for monitoring the input voltage.
7. DRAIN: Power switch drain pin.
8. SOURCE: Power switch source pin.

Functional Features

• Power Factor Correction (PFC): The FAN7317BM implements active PFC, ensuring a near-unity power factor by regulating the input current waveform.
• Constant Output Voltage: It maintains a stable output voltage within the specified range, compensating for variations in the input voltage.
• Overvoltage Protection: The IC includes protection mechanisms to prevent the output voltage from exceeding safe limits.
• Overcurrent Protection: It incorporates overcurrent detection and protection circuitry to safeguard against excessive load currents.
• Thermal Shutdown: The FAN7317BM features thermal shutdown functionality, which activates when the device temperature exceeds a predefined threshold, preventing overheating and potential damage.

Advantages and Disadvantages

Advantages

• Improved power factor: The FAN7317BM significantly enhances power factor correction, reducing harmonic distortion and improving overall energy efficiency.
• Compact size: Its small form factor makes it suitable for space-constrained applications.
• Wide operating voltage range: The IC can accommodate various input voltage levels, providing flexibility in power supply designs.
• Robust protection features: It incorporates multiple protection mechanisms, ensuring safe operation and protecting against potential damage.

Disadvantages

• Limited output power: The maximum output power of 200W may not be sufficient for high-power applications.
• External components required: Proper implementation of the FAN7317BM requires additional external components such as resistors, capacitors, and inductors.

Working Principles

The FAN7317BM operates based on the principle of active power factor correction. It utilizes a boost converter topology to regulate the input current waveform and achieve a near-unity power factor. By actively controlling the input current, it minimizes harmonic distortion and improves overall energy efficiency.

The IC continuously monitors the input voltage and current through dedicated pins (VSENSE and CS). It adjusts the duty cycle of the power switch to maintain a constant output voltage within the specified range. The feedback loop (FB and COMP pins) ensures accurate regulation by comparing the actual output voltage with the desired reference voltage.

Application Field Plans

The FAN7317BM finds extensive application in various electronic devices that require efficient power management and improved power factor correction. Some notable application fields include:

1. LED Lighting: The IC is commonly used in LED lighting systems to enhance power factor correction and improve energy efficiency.
2. Switching Power Supplies: It is widely employed in switching power supply designs to achieve high power conversion efficiency and comply with power quality standards.
3. Industrial Equipment: The FAN7317BM is utilized in industrial equipment such as motor drives, inverters, and uninterruptible power supplies (UPS) to ensure reliable and efficient power delivery.
4. Consumer Electronics: It can be found in consumer electronics products like televisions,