This document provides the test report for a digitally controlled asymmetrical half-bridge (AHB) converter, a flyback-derived resonant topology designed for high- efficiency and wide-output power conversion. The control algorithm implements zero-voltage switching (ZVS) control using a fast pulse-width modulation (PWM) on-time calculation and adaptive zero-voltage detection (ZVD) technique to maintain boundary ZVS across varying input and load conditions. The control algorithm also includes programmable zero - crossing detection (ZCD) count control, adaptive soft-start, and inductance compensation algorithms to maintain stable performance under production variations.
This evaluation board achieves a peak efficiency of 97.8% at 28V and 9A condition; targeting high-power applications (greater than 100W) such as USB PD adapters, industrial chargers, and power tools.
Merkmale
- 97.8% efficiency with 390VBUS, 28V at 9A
- Integrated half-bridge GaN FET used in system
- Multimode to optimize system performance in different output spec
- Adaptive boundary ZVS control