The KA5M0280R is a Fairchild/ON Semiconductor power switch consisting of an integrated Pulse Width Modulation (PWM) controller and SenseFET, tailored for offline flyback converter applications. It's designed to provide a cost-effective and efficient solution for power supplies, reducing external component count and simplifying circuit design.

Applications

• Power supplies for set-top boxes
• Adapters for various electronic devices
• Auxiliary power supplies
• DVD player power supplies
• Open-frame power supplies

Features

• Integrated PWM controller and SenseFET
• Low startup current
• Built-in soft-start function
• Overvoltage protection (OVP)
• Overload protection (OLP)
• Thermal shutdown (TSD)

Benefits

• Reduced component count, simplifying power supply design.
• Improved efficiency due to low startup current and optimized PWM control.
• Enhanced system reliability through built-in protection features.
• Simplified design process, saving development time and costs.
• Lower total system cost due to fewer external components.

Technical Specifications

The KA5M0280R operates typically from 85VAC to 265VAC. It can deliver power up to around 28W, suitable for various low-power applications. The switching frequency is internally optimized to minimize EMI. The device includes internal compensation circuitry for stable operation. It is packaged in a TO-220 or similar form factor. Its robust protection features and integrated design ensure reliable performance in diverse operating conditions.