Product Overview: L6699D - Enhanced High-Voltage Resonant Controller

The L6699D from STMicroelectronics is a state-of-the-art resonant controller IC specifically designed for high-efficiency, high-density power supplies with demanding performance requirements. This advanced controller is well-suited for applications in LCD and PDP TV power supplies, desktop and server power supplies, and silver box adapters, where efficiency and reliability are of the utmost importance.

Featuring a 600V half-bridge gate driver, the L6699D operates at a fixed frequency with an adjustable dead time facilitating zero voltage switching (ZVS), which minimizes switching losses and enhances overall system efficiency. The integrated high-voltage startup source ensures a quick and lossless power-up sequence, while the built-in bootstrap diode further simplifies the board layout and reduces external component count.

The L6699D's multi-mode operations, including burst-mode operation, ensure excellent performance across a wide range of load conditions. This capability allows the controller to maintain high efficiency even at light loads, making it an ideal choice for energy-saving power supplies that need to comply with stringent energy efficiency standards.

Protection features are paramount in power supply design, and the L6699D includes a comprehensive suite of protections. Over-current protection (OCP), over-voltage protection (OVP), and under-voltage lockout (UVLO) are incorporated to safeguard the power supply and the end application against various fault conditions. Additionally, the device features a non-dissipative over-power protection and a disable function, which can be triggered externally for further system-level control.

For designers looking for a robust and versatile resonant controller, the L6699D offers a compelling solution. Its advanced features, combined with STMicroelectronics' commitment to reliability and performance, make it a premier choice for cutting-edge power supply designs.

Key Features:

• 600V Half-Bridge Gate Driver
• Adjustable Dead-Time for ZVS
• High-Voltage Startup Source
• Integrated Bootstrap Diode
• Burst-Mode Operation for Improved Efficiency at Light Loads
• Comprehensive Protection Suite (OCP, OVP, UVLO)
• Non-Dissipative Over-Power Protection
• Disable Function for System-Level Control