MP6543H Brushless DC Motor Drivers Monolithic Power Systems (MPS) MP6543H Brushless DC Motor Drivers are 22V, 2A 3-phase power stages. The MP6543H Motor Drivers each integrate three half-bridges consisting of six N-channel power MOSFETs, as well as pre-drivers, gate drive power supplies, and current-sense amplifiers. These devices are available in three variants. The MP6543H has Enable (EN) and PWM inputs for each half-bridge. The MP6543H-A has separate High-Side (HS) and Low-Side (LS) inputs. The MP6543H-B has Hall-effect sensor inputs.