Two Phase Dual-coil High Voltage Smart Fan Motor Driver
Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82
General Description
The AH9281...
Description
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...
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