AH9281RTR-G1 Diodes Incorporated

Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Features General Description The AH9281/82 is a one-chip solution for driving High Sensitivity Integrated Hall Sensor Low Start-up Voltage two-coil brushless DC motors and fans. 5V and 12V Operation Based on the advanced CDMOS process, the IC Peak Output Current up to 1200mA Power Efficient CMOS and Power MOSFETs contains a Hall-effect sensor, dynamic offset Built-in Output Protection Clamping Diode correction and powerful output drivers with 1200mA peak output current capability. Locked Rotor Shutdown and Auto-restart Integrated Tachometer (AH9281) or Alarm (AH9282) Signal Output Specially designed for driving large fans, the device ESD Rating: 6000V (Human Body Model) is optimized for low start-up voltage. Frequency Generator or Rotation Detection is available. The 400V (Machine Model) open drain output makes easier the connectivity with any external interface such as hardware monitoring or Super I/O IC. Applications 5V/12V DC Brushless Motor/Fan The AH9281/82 is available in TO-95 and SOT-89-5 PC, Server, Laptop Cooling Fan packages. 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 R Package (TO-95) (SOT-89-5) DOB DO 5 4 5 GND 4 DOB DO 3 FG/RD 2 1 VCC 123 VCC GND FG/RD (Front View) (Top View) Figure 2. Pin Configuration of AH9281/82 Pin Description Pin Number Pin Name Function TO-95 SOT-89-5 1 1 VCC Power supply pin 2 3 FG/RD Frequency Generator (Rotation Detection) open drain output 3 4 DO Output pin 1 4 5 DOB Output pin 2 5 2 GND Ground pin Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 2