The KA5L0165RTU is a Fairchild (now ON Semiconductor) power switch, specifically a Fairchild Power Switch (FPS™) integrating a Sense FET and current mode PWM control IC. It is optimized for high performance and cost-effectiveness in offline flyback converter applications.

Applications:

• Power adapters for mobile devices
• Open-frame SMPS (Switch Mode Power Supply)
• Auxiliary power supplies
• DVD/STB (Set-Top Box) power supplies

Features:

• Internal Avalanche Rugged Sense FET
• Advanced Burst-Mode Operation for Standby
• Pulse-by-Pulse Current Limiting
• Over Voltage Protection (OVP)
• Over Load Protection (OLP)
• Internal Thermal Shutdown Function (TSD)
• Auto-Restart Mode

Benefits:

• Reduced component count and board space due to integrated design.
• Improved efficiency in standby mode due to advanced burst-mode operation.
• Enhanced reliability due to built-in protection features (OVP, OLP, TSD).
• Simplified design due to internal functionalities.
• Cost-effective solution for low-power SMPS applications.

Additional Details:

The KA5L0165RTU utilizes an internal avalanche-rugged Sense FET, providing robustness against voltage spikes. Its advanced burst-mode operation significantly reduces power consumption in standby mode, meeting stringent energy efficiency requirements. The pulse-by-pulse current limiting ensures stable operation under varying load conditions. The OVP, OLP, and TSD features protect the power supply and the connected load from damage due to abnormal operating conditions. The auto-restart mode allows the power supply to automatically recover from fault conditions.

This FPS integrates a fixed frequency oscillator. This device is typically available in a TO-220F package. It is designed for low-power applications requiring high efficiency and reliability.