The LNK456DG is an integrated offline switcher IC from Power Integrations, belonging to the LinkSwitch-XT2 family. This IC is designed for low power, non-isolated power supplies and provides a highly efficient and compact solution for applications requiring a simple and cost-effective power conversion.

Applications

• Appliance power supplies
• LED drivers
• Standby power supplies
• Metering applications
• Industrial control systems

Features

• Integrated 725 V MOSFET
• Self-biased supply
• On/Off control for high efficiency
• Frequency jittering for reduced EMI
• Over-temperature protection
• Overload protection
• Short-circuit protection

Benefits

• Reduced system cost through component integration
• High energy efficiency
• Simplified design
• Improved system reliability with comprehensive protection features
• Reduced EMI emissions
• Compact power supply solution

Additional Details

The LNK456DG incorporates a 725 V MOSFET and a sophisticated control circuit in a single package, minimizing external component count and simplifying power supply design. The self-biased supply eliminates the need for an external bias winding, further reducing cost and complexity. The On/Off control scheme optimizes efficiency, especially at light loads, making it suitable for standby power supplies. Frequency jittering helps to reduce EMI emissions, simplifying compliance with regulatory requirements.

The IC provides comprehensive protection features, including over-temperature, overload, and short-circuit protection, enhancing system reliability and preventing damage in fault conditions. It is commonly used in appliance power supplies, such as those for washing machines and refrigerators, as well as LED drivers for lighting applications. Its compact size and high efficiency make it a good choice for metering applications and industrial control systems. The LNK456DG is designed to meet stringent energy efficiency standards, such as Energy Star and EuP directives. Its integrated features and robust performance make it a versatile solution for low-power, non-isolated power supply applications.