The FSQ0765R is a highly integrated quasi-resonant (QR) Flyback PWM (Pulse Width Modulation) power switch from ON Semiconductor (formerly Fairchild Semiconductor). It's designed to simplify the design and improve the efficiency of offline flyback converters. The FSQ0765R incorporates a PWM controller and a SenseFET in a single package, reducing external component count and board space. It's optimized for applications requiring high efficiency, low standby power, and robust protection features.

Applications:

• LCD Monitors
• Adapters
• Open Frame Power Supplies
• Set-Top Boxes
• DVD Players

Features:

• Internal Avalanche-Rugged SenseFET
• Quasi-Resonant Operation for High Efficiency
• Advanced Burst-Mode Operation for Low Standby Power
• Over-Voltage Protection (OVP)
• Overload Protection (OLP)
• Over-Temperature Protection (OTP)
• Under-Voltage Lockout (UVLO)
• Frequency Hopping for Reduced EMI

Benefits:

• Simplified design due to integrated PWM controller and SenseFET.
• High efficiency due to quasi-resonant operation and burst-mode operation.
• Low standby power consumption, meeting stringent energy efficiency standards.
• Robust protection features for enhanced system reliability.
• Reduced EMI due to frequency hopping.
• Minimized external component count.

Technical Specifications:

• Input Voltage Range: 85VAC to 265VAC
• Output Power: Up to 100W
• Switching Frequency: 67kHz
• Drain-Source Breakdown Voltage (BVDSS): 650V
• On-Resistance (RDS(on)): 7.5 Ohms
• Operating Temperature Range: -25°C to +85°C
• Package: TO-220F-6L

The FSQ0765R offers a complete solution for designing efficient and reliable flyback converters. Its quasi-resonant operation minimizes switching losses, while its burst-mode operation reduces standby power consumption. The integrated protection features safeguard the converter against various fault conditions. The frequency hopping feature helps reduce EMI, simplifying compliance with regulatory standards. The TO-220F-6L package provides good thermal performance. This power switch is an ideal choice for applications requiring high efficiency, low standby power, and robust protection.