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TOP257LN

TOP257LN Description

The TOP257LN is an integrated offline switch designed for flyback topology applications, manufactured by Power Integrations. This device is part of the AC-DC Converters and Offline Switches category and is housed in a 7-pin FESIP package. The TOP257LN features a breakdown voltage of 700V, making it suitable for high-voltage applications. It supports a maximum power output of 105 watts and operates with a switching frequency of either 66kHz or 132kHz, depending on the specific requirements of the application. The device is equipped with internal switches and offers a duty cycle of 78%, ensuring efficient power conversion.

TOP257LN Features

• High Breakdown Voltage: The TOP257LN boasts a 700V breakdown voltage, which is essential for applications requiring robustness against high voltage spikes.
• Efficient Power Output: With a maximum power output of 105 watts, the TOP257LN can handle a wide range of power demands, making it versatile for various applications.
• Dual Switching Frequencies: The ability to operate at either 66kHz or 132kHz provides flexibility in designing power supplies with different efficiency and size requirements.
• Comprehensive Fault Protection: The device includes current limiting, over-temperature, and over-voltage protection, ensuring reliable operation and safeguarding against potential faults.
• Isolated Output: The TOP257LN offers isolated output, which is crucial for applications requiring electrical isolation between the input and output.
• Compliance and Safety: The device is REACH unaffected and RoHS compliant, meeting stringent environmental and safety regulations.
• Mounting Type: The through-hole mounting type ensures secure and stable installation in printed circuit boards.

TOP257LN Applications

The TOP257LN is ideal for applications that demand high efficiency and robustness in power conversion. Its high breakdown voltage and efficient power output make it suitable for:

• Power Supplies: Ideal for designing power supplies for various electronic devices, including those with demanding voltage and power requirements.
• Adapters and Chargers: Suitable for creating compact and efficient adapters and chargers for consumer electronics.
• Industrial Equipment: Can be used in industrial applications where high voltage and power handling capabilities are required.
• Medical Devices: The isolated output and comprehensive fault protection make it suitable for medical equipment where safety and reliability are paramount.

Conclusion of TOP257LN

The TOP257LN from Power Integrations is a versatile and robust offline switch designed for flyback topology applications. Its high breakdown voltage, efficient power output, and comprehensive fault protection make it an excellent choice for a variety of applications, from power supplies to industrial equipment. Despite being marked as obsolete, the TOP257LN remains a reliable option for engineers and designers seeking a high-performance offline switch. Its compliance with environmental and safety standards ensures that it meets the stringent requirements of modern electronics manufacturing.