MP6543 2A 3-Phase Brushless DC Motor Drives Monolithic Power Systems (MPS) MP6543 Brushless DC Motor Drivers are 12V, 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 MP6543 has Enable (EN) and PWM inputs for each half-bridge. The MP6543A has separate High-Side (HS) and Low-Side (LS) inputs. The MP6543B has Hall-effect sensor inputs.