DK8515

This product is an AC-DC power switch IC based on an asymmetric half-bridge architecture, integrating two GaN power devices. It enables zero-voltage switching (ZVS) turn-on of the primary-side power switch and zero-current switching (ZCS) turn-off of the secondary-side rectifier over a wide load range, thereby improving the overall efficiency of the power supply system. Soft-switching technology also helps reduce switching stress on power devices, lower switching losses, and improve EMI performance. The peripheral circuit design is highly streamlined, significantly simplifying the design and manufacturing process of AC-DC converters, making it particularly suitable for applications demanding high conversion efficiency and high power density. The IC features comprehensive protection functions, including overload protection, output overvoltage protection, output short-circuit protection, VCC overvoltage and undervoltage protection, VS pin fault protection, primary-side overcurrent protection, and over-temperature protection.

Applications

• High power density fast chargers
• Adapters
• Laptop adapters
• Tablet adapters
• TV power supplies

Key features

• Integrated dual 700V GaN power transistors
• Integrated asymmetric half-bridge controller and half-bridge driver
• Switching frequency up to 800kHz
• Standby power consumption below 50mW
• Adaptive dead-time control
• Minimalist peripheral circuit design
• Built-in full-range frequency dithering circuit for improved EMI performance
• Halogen-free and RoHS compliant
• Built-in high-voltage startup circuit and X-capacitor discharge circuit
• Built-in resonant capacitor discharge function
• J master version supports PFC disable at 90VAC input voltage