Single-Phase, BLDC, Motor Driver with Integrated Hall Sensor



The MP9518 is a single-phase, brushless, DC motor driver with integrated power MOSFETs and a hall-effect sensor. The MP9518 drives single-phase, brushless, DC fan motors with up to 1.2A of output current limit. The IC has a 3.3V to 18V input voltage range and input line reverse-voltage protection to save the external diode on the supply line. The MP9518 controls the rotational speed through the PWM signal on the PWM pin. The MP9518 has a rotational speed detector 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 MP9518 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 deadlocked protection, thermal shutdown, and input reverse protection. The MP9518 requires a minimal number of external components to save solution cost. The MP9518 is available in a TSOT23-6 package.


  • Embedded Hall Sensor with High Sensitivity
  • Wide 3.3V to 18V Operating Input Range
  • Up to 1.2A Programmable Current Limit
  • Integrated Power MOSFETs: Total 850mO (HS + LS)
  • Automatic Phase Lock Detection of Winding BEMF and Current Zero-Crossing
  • Soft On/Off Phase Transition
  • Rotational Speed Indicator FG Signal
  • 12kHz to 48kHz PWM Input Frequency Range
  • Fixed 26kHz Output Switching Frequency
  • Input Line Reverse-Voltage Protection (RVP)
  • Rotor Deadlocked Protection and Automatic Recovery
  • Thermal Protection and Automatic Recovery
  • Built-In Input OVP, UVLO, and Automatic Recovery
  • Available in a TSOT23-6 Package


  • Number of Half-Bridges2
  • Hall InputYes
  • GradeCatalog
  • Iout (max) (A)1.2
  • Vin (max) (V)18
  • 最小输入电压3.3
  • PackageTSOT23-6, TSOT23-6-SL