96% efficient, buck converter demo board uses eGaN FETs

The EPC9107 is a fully functional buck power conversion demonstration circuit board that features a 9 to 28-V input with a 3.3-V 15-A-maximum-output 1-MHz buck converter. It uses the EPC2015 eGaN FET in conjunction with the LM5113 100-V half-bridge gate driver from Texas Instruments.

The demonstration board is 3 in. square and contains a closed-loop buck converter with optimized control loop. The complete power stage including eGaN FETs, driver, inductor. and input/output caps is in a 0.5 x 0.5-in. layout. The demo board contains various probe points to facilitate simple waveform measurement and efficiency calculation.