The MP6540H and MP6540HA are three-phase brushless DC motor drivers. These devices integrate three half-bridges consisting of six Nchannel power MOSFETs, pre-drivers, gate drive power supplies, and current-sense amplifiers.
The MP6540H has enable (EN) and PWM inputs for each half-bridge, while the MP6540HA has separate high-side and low-side inputs. Otherwise, both parts are identical.
The MP6540H can deliver up to 6A of peak current and 5A of continuous output current, based on thermal and PCB conditions. The MP6540H uses an internal charge pump to generate the gate drive supply voltage for the high-side MOSFETs, and a trickle charge circuit that maintains sufficient gate drive voltage to operate at 100% duty cycle.
Internal safety features include thermal shutdown, under-voltage lockout (UVLO), and over-current protection (OCP).
The MP6540H is available in a QFN-26 (5mmx5mm) package.