The FSFR2100RB is a highly integrated quasi-resonant (QR) flyback power switch manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It is designed to provide a compact and efficient solution for offline power supplies. This component integrates a power MOSFET and a control IC, simplifying the design and reducing the overall component count in power supply applications.

Applications

• LCD TVs: Powering the LCD panel and other internal components.
• LED Lighting: Driving LED lights in residential and commercial applications.
• Adapters: Powering electronic devices such as laptops, printers, and gaming consoles.
• Auxiliary Power Supplies: Providing standby power for various electronic systems.
• Set-Top Boxes: Powering the internal circuitry of set-top boxes.

Features

• Quasi-Resonant Operation: Reduces EMI and improves efficiency by switching at valley voltage.
• Integrated MOSFET: Includes a high-voltage power MOSFET, reducing external component count.
• Internal Startup Circuit: Facilitates a fast and reliable startup.
• Protection Features: Includes Over Voltage Protection (OVP), Over Current Protection (OCP), Over Temperature Protection (OTP), and Under Voltage Lockout (UVLO).
• Frequency Hopping: Reduces EMI emissions by varying the switching frequency.

Benefits

• High Efficiency: Quasi-resonant operation minimizes switching losses, resulting in high energy efficiency.
• Compact Design: Integration of MOSFET and control IC reduces board space requirements.
• Enhanced Reliability: Built-in protection features ensure robust and reliable operation.
• Simplified Design: Fewer external components simplify the design process and reduce manufacturing costs.
• Reduced EMI: Frequency hopping and quasi-resonant operation minimize electromagnetic interference.

Additional Details

The FSFR2100RB incorporates advanced control techniques to optimize performance and efficiency. It is designed to meet stringent energy efficiency standards. The quasi-resonant operation ensures that the MOSFET switches at the valley of the voltage waveform, minimizing switching losses and reducing EMI. The integrated protection features safeguard the power supply against various fault conditions, enhancing the overall reliability of the system. The device is available in a compact package, making it suitable for space-constrained applications. Proper thermal management is crucial for optimal performance; a heatsink may be required depending on the application and operating conditions. Consult the datasheet for detailed electrical specifications, application guidelines, and thermal considerations.