ON Semiconductor FAN7601M Green-Mode PWM Controller

The FAN7601M from ON Semiconductor is a versatile and efficient green-mode PWM (Pulse Width Modulation) controller designed for use in switched-mode power supplies. This innovative component integrates a number of advanced features that make it an ideal choice for power supply designers looking to achieve high efficiency and reliability in their applications, such as AC/DC adapters, PC auxiliary power, and LCD monitors.

Key Features and Benefits

• Green Mode Operation: The FAN7601M offers green-mode operation, which significantly reduces standby power consumption. This is achieved by modulating the switching frequency at light loads, thereby improving overall efficiency and meeting various international power conservation requirements.
• High-Voltage Startup: With a built-in high-voltage startup circuit, the FAN7601M can be powered directly from the rectified mains voltage, thereby reducing the number of external components required and simplifying the power supply design.
• Burst Mode Operation: To further enhance efficiency at light loads, the FAN7601M incorporates burst mode operation, which reduces switching losses by entering a low-power standby state during periods of low demand.
• Frequency Modulation for Reduced EMI: The device features frequency modulation to spread the electromagnetic interference (EMI) and minimize the need for EMI filtering components, thus simplifying design and reducing costs.
• Protection Features: The FAN7601M is equipped with a comprehensive set of protection features, including over-voltage protection (OVP), over-current protection (OCP), and thermal shutdown. These features ensure safe operation under abnormal conditions and extend the lifespan of the power supply.
• Soft Start: The soft-start function minimizes stress on the power supply during startup by gradually increasing the PWM duty cycle, which helps prevent overshoot and extends the life of the power supply components.

Overall, the FAN7601M is a highly integrated, efficient, and robust solution for modern power supply designs. Its green-mode operation and advanced protection features enable designers to create power supplies that not only meet but exceed energy-saving standards, while maintaining a high level of performance and reliability.

For detailed technical specifications and application guidelines, designers are encouraged to consult the FAN7601M datasheet available on the ON Semiconductor website.