Does EPC plan to offer a development board for evaluation of eGaN™ FETs in Class D Amplifiers?
EPC development boards are designed to help simplify the evaluation process of EPC’s eGaN™ FETs. The list of available development boards and supporting documentation is growing and can be found Tools and Design Support/ DemoBoards page The EPC9001 development board can be used to create Class D audio designs by connecting the development board to your class D design as you would any buck converter as shown in the quick start guide. As the minimum dead-time in class D is critical to limit cross-over distortion, this can be adjusted by changing R5 and R6 for rising and falling edges accordingly. The current values have been chosen to avoid shoot-through given part-to-part variation of all other board components and may not be optimum for a given board. Please take care during this adjustment to avoid shoot-through. We suggest adjusting these resistors only while running VDD and PWM alone with no bus voltage and measuring both gate signals simultaneously to determine the dead-time.
