The TDHBG2500P100 half-bridge evaluation board provides the elements of a simple buck or boost converter for basic study of switching characteristics and efficiency achievable with Transphorm’s 650 V GaN FETs. In either buck or boost mode the circuit can be configured for synchronous rectification. Jumpers allow use of a single logic input or separate hi/lo inputs. The high-voltage input and output can operate at up to 400 V_DC, with a power output of up to 2.5 kW. The inductor provided is intended for efficient operation at 100 kHz, although other inductors and other frequencies may be easily used.