Diodes AH9281_82 Manual do Utilizador descarregar pdf

Data Sheet

Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82

Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited

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

• P C , S e r v e r , L a p t o p C o o l i n g F a n

• Power Supply Cooling Fan

• Large or Small Fans

TO-95 SOT-89-5

Figure 1. Package Types of AH9281/82

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