L6565D

The L6565D is a quasi-resonant controller designed for ZVS (Zero Voltage Switching) flyback converters, offering high efficiency and low power consumption. This current-mode primary controller features advanced functionalities like frequency foldback for optimal standby efficiency, ultra-low start-up current (<70uA), and a 400mA gate driver.

It provides reliable protection through on-chip filtering, precise voltage references, and internal UVLO for energy-efficient applications. The L6565D is suited for TV/monitor SMPS, chargers, and digital consumer electronics, helping to ensure consistent performance even under varying power conditions.

Key Features :

• Quasi-resonant operation with ZVS topology for high efficiency.
• Line voltage feedforward for power consistency under mains changes.
• Ultra-low start-up current (<70µA) and quiescent current (<3.5mA).
• Totem pole gate driver with 400mA peak current, ensuring strong MOSFET driving capability.
• Internal precision reference voltage with 1% accuracy.
• Pulse-by-pulse and hiccup-mode overcurrent protection (OCP) for enhanced system reliability.