The KA1M0680 is a Fairchild/ON Semiconductor power switch designed for offline switch-mode power supplies (SMPS). It integrates a power MOSFET and a current mode PWM controller, simplifying the design and reducing the component count in power supply applications. It is specifically designed to provide a cost-effective solution for low-power SMPS applications.

Applications:

• Adapters
• Chargers
• Auxiliary power supplies
• Standby power supplies
• Open-frame power supplies
• DVD/STB power supplies

Features:

• Integrated power MOSFET
• Current mode PWM controller
• Low startup current (typically <100μA)
• Built-in soft-start function
• Frequency hopping for improved EMI performance
• Over-voltage protection (OVP)
• Over-current protection (OCP)
• Over-temperature protection (OTP)
• Under-voltage lockout (UVLO)

Benefits:

• Simplified power supply design
• Reduced component count
• Lower cost
• Improved efficiency
• Enhanced EMI performance
• Protection against faults
• Increased system reliability

Technical Specifications:

• Input Voltage Range: Wide range (typically 85VAC to 265VAC)
• Output Power: Consult datasheet for specific power rating
• Switching Frequency: Consult datasheet for specific value (e.g., 65kHz)
• Drain-Source Breakdown Voltage (BVDSS): 680V
• On-Resistance (RDS(on)): Consult datasheet for specific value
• Operating Temperature: Consult datasheet for specific range
• Package: Consult datasheet for specific package type (e.g., DIP-8, TO-220)

The Fairchild/ON Semiconductor KA1M0680 power switch provides a cost-effective and efficient solution for low-power offline switch-mode power supplies. Its integrated MOSFET and PWM controller simplify the design process, while its built-in protection features ensure reliable operation. The frequency hopping feature minimizes EMI, making it suitable for applications where electromagnetic compatibility is critical. The KA1M0680's low startup current reduces standby power consumption, making it ideal for energy-efficient power supplies. Its comprehensive protection features, including OVP, OCP, and OTP, ensure safe and reliable operation under various fault conditions.