Evaluation Board | NCP1681MM500WGEVB

The NCP1681MM500WGEVB is a high-voltage demonstration board for evaluating a 500 W bridgeless totem pole power factor correction stage across a 90 to 265 Vac input range. The design uses the NCP1681AA fixed-frequency continuous conduction mode PFC controller, NCP58921 650 V driver-integrated GaN FETs in the fast-switching leg, the NCP51561BA isolated gate driver, and the NCP51530 high-voltage half-bridge driver for the slow leg.
The board regulates its output to 395 Vdc nominally and eliminates the conventional input diode bridge to reduce conduction losses and support higher power density. Multiple connectors and test points simplify waveform capture and evaluation of current sensing, control-loop response, skip-mode operation, power factor, harmonic distortion, thermal behavior, and conducted emissions.
This EVB is intended only for trained professionals and must not be used to power loads other than an electronic load.