The MP6517A and MP6517B are single-phase, brushless, DC motor drivers with integrated power MOSFETs and a Hall effect sensor. The MP6517A/MP6517B drives single-phase brushless DC fan motors with up to 2A of output current limit. The IC has a 3.3V to 16V input voltage range and input line reverse voltage protection to save the external diode on the supply line.The MP6517A/MP6517B controls the rotational speed through the PWM signal on the PWM pin. The MP6517A/MP6517B has a rotational speed detection feature and rotor lock fault indication on FG/RD with an open-drain collector output. The output speed versus the input duty curve can be programmed easily for flexible use. To reduce fan driver audible noise and power loss, the MP6517A/MP6517B features a soft on/off phase transition and automatic phase-lock function of the motor winding BEMF and current. Full protection features include input over-voltage protection (OVP), under-voltage lockout (UVLO), rotor deadlock protection, thermal shutdown, and input reverse protection.The MP6517A/MP6517B requires a minimal number of external components to save solution cost. The MP6517A/MP6517B is available in TSOT23-6-L, TSOT23-6-R, TSOT23-6-SL, and TSOT23-6-RSL packages.