The KA5M0380RT0 is a Fairchild/ON Semiconductor power switch designed for offline flyback converters, integrating a SenseFET and current mode PWM control IC. This integration minimizes external components, enabling the design of compact and efficient power supplies. It is suitable for applications requiring power conversion from AC mains to DC voltage, such as power adapters and auxiliary power supplies.

Applications:

• Power supplies for LCD monitors
• Adapters for various electronic devices
• Auxiliary power supplies for home appliances
• Standby power supplies

Features:

• Integrated SenseFET and PWM Control IC: Reduces component count and simplifies design.
• Current Mode PWM Control: Provides excellent line regulation and load regulation.
• Built-in Soft-Start Function: Reduces stress on components during startup.
• Over Voltage Protection (OVP): Protects the power supply and load from excessive voltage.
• Over Load Protection (OLP): Protects the power supply and load from excessive current.
• Thermal Shutdown Function (TSD): Protects the power supply from overheating.
• Auto-Restart Mode: Automatically restarts the power supply after a fault condition is cleared.

Benefits:

• Compact Power Supply Design: Integration of SenseFET and PWM control reduces board space.
• High Efficiency: Current mode PWM control optimizes efficiency.
• Reliable Operation: Comprehensive protection features ensure reliable operation.
• Simplified Design: Reduced component count simplifies power supply design.
• Cost-Effective Solution: Integration minimizes the overall cost of the power supply.

Additional Details:

The KA5M0380RT0 employs a current mode PWM control technique, which offers superior line regulation and load regulation. The integrated SenseFET enhances the efficiency of power conversion. The built-in soft-start function reduces stress on components during the power supply's startup phase, thereby improving its reliability. The device includes overvoltage protection (OVP), overload protection (OLP), and thermal shutdown (TSD) to protect both the power supply and the load from various fault conditions. The auto-restart mode automatically attempts to restart the power supply after a fault has been cleared, thereby increasing system availability.

Specifications:

• Drain-Source Voltage (VDS): 800V
• Drain Current (ID): 3A
• Operating Frequency: 100kHz (Typical)
• Operating Temperature Range: -25°C to +85°C