The KA5M0365R is a Fairchild (now ON Semiconductor) power switch, belonging to the Fairchild Power Switch (FPS™) family. It integrates a Sense FET and a current mode PWM control IC, designed for offline flyback converter applications.

Applications:

• Power supplies for TVs
• Power supplies for VCRs
• Power supplies for STBs (Set-Top Boxes)
• Adapters
• Auxiliary power supplies

Features:

• Internal Avalanche Rugged Sense FET
• Low Start-up Current (Typ. 25uA)
• Built-in Soft Start Function (25ms)
• 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 in power supply designs.
• Improved efficiency due to the integrated Sense FET and PWM control.
• Enhanced reliability due to built-in protection features (OVP, OLP, TSD).
• Simplified design due to soft-start function and low start-up current.
• Cost-effective solution for SMPS applications.

Additional Details:

The KA5M0365R incorporates an internal avalanche-rugged Sense FET, providing increased robustness against voltage transients. The low start-up current minimizes power consumption during the initial startup phase. The internal soft-start function reduces stress on the power components during startup, enhancing overall system reliability. 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 potential damage due to abnormal operating conditions. The auto-restart mode allows the power supply to automatically recover from fault conditions.

The device is typically available in a TO-220F package and is designed for use in a variety of power supply applications requiring high efficiency and reliability.