The KA3S0880RB-TU is a Fairchild/ON Semiconductor power switch designed for offline flyback converters. It integrates a SenseFET and a current mode PWM control IC, minimizing external components and enabling compact, efficient power supply designs. This power switch is suitable for various applications requiring power conversion from AC mains to DC voltage.

Applications:

• Power supplies for DVD players
• 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 KA3S0880RB-TU utilizes a current mode PWM control scheme, which offers excellent line regulation and load regulation. The integrated SenseFET ensures efficient power conversion. The built-in soft-start function minimizes stress on components during startup, improving reliability. The device incorporates overvoltage protection (OVP), overload protection (OLP), and thermal shutdown (TSD) to safeguard the power supply and load from various fault conditions. The auto-restart mode automatically attempts to restart the power supply after a fault is cleared, improving system availability.

Specifications:

• Drain-Source Voltage (VDS): 800V
• Drain Current (ID): 8A
• Operating Frequency: 100kHz (Typical)
• Operating Temperature Range: -25°C to +85°C