The L6567D from STMicroelectronics is a state-of-the-art integrated circuit designed for high-efficiency resonant converters. This advanced high-voltage controller is a perfect solution for power supply units that require high levels of reliability and performance, such as flat-panel televisions, high-density servers, and telecom power supplies.

Key Features

• Multi-Mode Operation: The L6567D supports both the traditional fixed-frequency (FF) control method and the novel quasi-resonant (QR) zero-voltage switching (ZVS) technique. This flexibility allows for optimization of efficiency and electromagnetic interference (EMI) performance across a wide range of operating conditions.
• High-Voltage Capability: With a startup supply voltage of up to 30V and a high-voltage rail up to 600V, this controller is suitable for applications that operate at high power levels.
• Integrated Protections: The L6567D incorporates a comprehensive set of protection features, including over-current protection, over-voltage protection, and thermal shutdown, ensuring safe operation under abnormal conditions.
• Burst-Mode Operation: To enhance efficiency at light loads, the device offers a burst-mode operation that significantly reduces the switching frequency and minimizes quiescent consumption.
• Adjustable Dead-Time: This feature allows for fine-tuning of the dead-time between high-side and low-side MOSFETs, optimizing efficiency and preventing shoot-through.

Applications

The versatility of the L6567D resonant controller makes it suitable for a broad range of applications, including:

• High-efficiency AC-DC adapters
• Power supplies for LED lighting
• Telecom power supplies
• Server and desktop power supplies
• Flat-panel television power units

Conclusion

The L6567D resonant controller from STMicroelectronics represents a leap forward in power supply design, offering a flexible, efficient, and reliable solution for today's energy-conscious electronics market. With its advanced features and robust protections, it stands as an ideal choice for designers looking to enhance the performance of their high-voltage power conversion applications.