FAN9673Q

Product Overview

Category

FAN9673Q belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This product is primarily used for power factor correction (PFC) applications in electronic devices. It helps improve the efficiency of power conversion by correcting the phase relationship between the input voltage and current.

Characteristics

• High efficiency: FAN9673Q offers excellent power factor correction, resulting in improved energy efficiency.
• Compact package: The IC is available in a small form factor, making it suitable for space-constrained applications.
• Wide input voltage range: It can operate with a wide range of input voltages, enhancing its versatility.
• Low standby power consumption: FAN9673Q minimizes power wastage during idle periods.

Package

The FAN9673Q IC is typically packaged in a compact and robust QFN (Quad Flat No-leads) package. This package ensures good thermal dissipation and ease of integration onto circuit boards.

Essence

The essence of FAN9673Q lies in its ability to efficiently correct power factors, leading to improved energy utilization and reduced power wastage.

Packaging/Quantity

The IC is usually supplied in reels or trays, depending on the manufacturer's packaging standards. The quantity per reel or tray may vary but is typically around 250 to 300 units.

Specifications

• Input Voltage Range: 85V - 265V AC
• Output Power: Up to 300W
• Operating Frequency: 65kHz - 100kHz
• Efficiency: >95%
• Standby Power Consumption: <0.5W
• Protection Features: Overvoltage protection, overcurrent protection, short-circuit protection

Detailed Pin Configuration

The FAN9673Q IC has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for regulating output voltage
4. COMP: Compensation pin for stability control
5. CS: Current sense input for current regulation
6. RT/CT: Timing components connection for frequency control
7. DRAIN: High-voltage power switch drain
8. SOURCE: High-voltage power switch source

Functional Features

• Power Factor Correction (PFC): FAN9673Q efficiently corrects the phase relationship between input voltage and current, resulting in improved power factor.
• Constant Output Voltage: The IC regulates the output voltage to ensure a stable power supply to the load.
• Overvoltage Protection: It incorporates protection mechanisms to prevent damage due to excessive output voltage.
• Overcurrent Protection: FAN9673Q safeguards against excessive current flow, protecting both the IC and the connected devices.
• Short-Circuit Protection: In case of a short circuit, the IC detects the fault and shuts down the power supply to prevent further damage.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced energy consumption.
• Compact package allows for easy integration into various applications.
• Wide input voltage range enhances versatility.
• Low standby power consumption minimizes wastage during idle periods.

Disadvantages

• May require additional external components for certain applications.
• Limited output power capability compared to higher-rated PFC ICs.

Working Principles

FAN9673Q operates on the principle of active power factor correction. It uses a boost converter topology to regulate the input current waveform, aligning it with the input voltage waveform. This alignment improves the power factor and reduces harmonic distortion.

The IC continuously monitors the input voltage and current, adjusting the duty cycle of the internal power switch to maintain a constant output voltage. It also incorporates feedback control to ensure stability and protect against overvoltage, overcurrent, and short-circuit conditions.

Detailed Application Field Plans

FAN9673Q finds applications in various electronic devices that require power factor correction. Some of the common application fields include:

1. LED Lighting: The IC can be used in LED drivers to improve power efficiency and meet regulatory requirements.
2. Switching Power Supplies: FAN9673Q enhances the performance of switching power supplies by correcting power factors and reducing energy wastage.
3. Industrial Equipment: It is suitable for power factor correction in industrial equipment, such as motor drives and welding machines.
4. Consumer Electronics: The IC can be utilized in consumer electronics, including televisions, audio systems, and computer power supplies, to enhance energy efficiency.

Detailed and Complete Alternative Models

• FAN9611: A similar power factor correction IC with enhanced features and higher output power capability.
• UCC28070: An alternative IC offering power factor correction and additional protection features.
• L6562A: Another option for power factor correction applications, providing high efficiency and a wide input voltage range.

These alternative models offer similar functionality to FAN9673Q but may