The FSCQ1265RT is a highly integrated offline flyback switcher from Fairchild/ON Semiconductor, designed for high-performance and energy-efficient power supplies. It incorporates a PWM controller and a SenseFET, minimizing external components and simplifying the overall design. This device provides a robust and cost-effective solution for a wide range of applications requiring high efficiency and low standby power consumption.

Applications:

• Power adapters for consumer electronics (e.g., DVD players, set-top boxes)
• Auxiliary power supplies in home appliances
• Open-frame power supplies
• Battery chargers for portable devices
• Standby power supplies for various electronic systems

Features:

• Integrated SenseFET: Reduces external component count and simplifies PCB layout.
• Quasi-Resonant Operation: Minimizes switching losses and improves efficiency.
• Advanced Burst-Mode Operation: Achieves ultra-low standby power consumption.
• Over Voltage Protection (OVP): Protects the system from damage due to overvoltage conditions.
• Over Load Protection (OLP): Prevents excessive power dissipation under overload conditions.
• Internal Thermal Shutdown (OTP): Protects the device from overheating.
• Under Voltage Lockout (UVLO): Ensures stable operation during startup and prevents malfunction at low input voltage.

Benefits:

• High Efficiency: Reduces energy waste and lowers operating costs.
• Low Standby Power: Meets strict energy efficiency standards and reduces environmental impact.
• Simplified Design: Lowers BOM cost and reduces development time.
• Robust Protection Features: Improves system reliability and prevents failures.
• Compact Size: Enables smaller and lighter power supply designs.

Additional Details:

The FSCQ1265RT operates using a quasi-resonant flyback topology, which minimizes switching losses and improves overall efficiency. The integrated SenseFET provides accurate current sensing, enabling precise control of the output power. The advanced burst-mode operation significantly reduces power consumption under light-load conditions, making it ideal for applications requiring low standby power. This device is available in a TO-220F package.