AH9281

Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 General Description The AH9281/82 is a one-chip solution for driving two-coil brushless DC motors and fans. Based on the advanced CDMOS process, the IC contains a Hall-effect sensor, dynamic offset correction and powerful output drivers with 1200mA peak output current capability. Specially designed for driving large fans, the device is optimized for low start-up voltage. Frequency Generator or Rotation Detection is available. The open drain output makes easier the connectivity with any external interface such as hardware monitoring or Super I/O IC. The AH9281/82 is available in TO-95 and SOT-89-5 packages. Features High Sensitivity Integrated Hall Sensor Low Start-up Voltage 5V and 12V Operation Peak Output Current up to 1200mA Power Efficient CMOS and Power MOSFETs Built-in Output Protection Clamping Diode Locked Rotor Shutdown and Auto-restart Integrated Tachometer (AH9281) or Alarm (AH9282) Signal Output ESD Rating: 6000V (Human Body Model) 400V (Machine Model) Applications 5V/12V DC Brushless Motor/Fan PC, Server, Laptop Cooling Fan Power Supply Cooling Fan Large or Small Fans TO-95 SOT-89-5 Figure 1. Package Types of AH9281/82 Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 1 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Pin Configuration Z5 Package (TO-95) 5 4 3 2 1 (Front View) GND DOB DO FG/R...