onsemi

FSQ321LX  

AC DC Converters, Offline Switches

FSQ321LX Description

The FSQ321LX is an obsolete offline switch IC designed for flyback topology applications, manufactured by onsemi. This device is part of the FPS™ series and is housed in an 8-lead small outline package (8LSOP). It features an internal switch with a switching frequency range of 55kHz to 67kHz, providing efficient power conversion. The FSQ321LX operates within a supply voltage range of 8V to 20V and offers a breakdown voltage of 650V, making it suitable for high-voltage applications. It also includes a start-up voltage of 12V and is designed for surface-mount applications. The device is REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance. It has a moisture sensitivity level (MSL) of 3, allowing for a 168-hour storage period before reflow soldering. The FSQ321LX provides 12W of power output and includes control features such as synchronization. It also offers comprehensive fault protection mechanisms, including current limiting, over-load, over-temperature, and over-voltage protection. The device is available in a tape and reel package, making it suitable for automated assembly processes.

FSQ321LX Features

• Internal Switch: Equipped with an internal switch, the FSQ321LX simplifies circuit design and reduces component count.
• Switching Frequency: Operates within a frequency range of 55kHz to 67kHz, ensuring efficient power conversion and minimal electromagnetic interference (EMI).
• Wide Supply Voltage Range: Functions effectively within an 8V to 20V supply voltage range, providing flexibility for various input voltage conditions.
• High Breakdown Voltage: Features a 650V breakdown voltage, making it suitable for high-voltage applications and ensuring robustness against voltage spikes.
• Start-Up Voltage: Requires a start-up voltage of 12V, ensuring reliable operation during initial power-up.
• Output Isolation: Provides isolated output, enhancing safety and reliability in applications where galvanic isolation is necessary.
• Control Features: Includes synchronization capabilities, which help in reducing EMI and improving overall system performance.
• Fault Protection: Offers comprehensive fault protection mechanisms, including current limiting, over-load, over-temperature, and over-voltage protection, ensuring reliable operation and long-term durability.
• Compliance and Safety: REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance.
• Moisture Sensitivity Level: MSL 3 (168 hours), allowing for extended storage periods before reflow soldering, which is beneficial for manufacturing processes.
• Packaging: Available in a tape and reel package, facilitating automated assembly and ensuring high production efficiency.

FSQ321LX Applications

The FSQ321LX is ideal for a variety of applications where efficient power conversion and high reliability are required. Its unique features make it suitable for:

• Consumer Electronics: Ideal for applications such as power supplies for televisions, monitors, and other consumer devices where high efficiency and low EMI are crucial.
• Industrial Equipment: Suitable for industrial control systems, where reliable power conversion and protection mechanisms are essential for continuous operation.
• Medical Devices: Applicable in medical equipment where isolated output and high reliability are required to ensure patient safety and accurate device operation.
• Telecommunications: Ideal for power supplies in telecommunication infrastructure, where high efficiency and robustness against voltage spikes are necessary.
• Automotive Electronics: Suitable for automotive applications where high-voltage tolerance and reliable operation are critical.

Conclusion of FSQ321LX

The FSQ321LX is a versatile and reliable offline switch IC designed for flyback topology applications. Its wide range of features, including an internal switch, high breakdown voltage, and comprehensive fault protection, make it an excellent choice for various applications. The device's compliance with environmental and safety regulations further enhances its suitability for modern electronics. Although now obsolete, the FSQ321LX remains a robust solution for applications requiring efficient power conversion and high reliability.

FSQ321LX Documents

Download datasheets and manufacturer documentation for FSQ321LX

PCN Assembly/Origin :

Alternate Assembly Site 16/Apr/2015      

PCN Packaging :

Mult Devices 24/Oct/2017      

PCN Obsolescence/ EOL :

Mult Dev EOL 30/Mar/2023      

PCN Design/Specification :

Logo 17/Aug/2017       MSL 04/May/2016      

Environmental Information :

onsemi RoHS       Material Declaration FSQ321LX