Diodes Incorporated
Back to Inactve Datasheet Archive

AH9281 (Obsolete)

Inactive Datasheet Archive

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.

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.

Feature(s)

  • 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)

Application(s)

  • 5V/12V DC Brushless Motor/Fan
  • PC, Server, Laptop Cooling Fan
  • Power Supply Cooling Fan
  • Large or Small Fans

Product Specifications

Product Parameters

Average OutputDrive Current (mA) 600
Frequency Generator (FG) and Rotation Detect FG
Lock Detect, Shut-Down and Auto Start Yes
Operating Ambient Temperature (°C) -40 to 15
Operating Point Bop Gauss (Max) 50
Operating Point Bop Gauss (Min) -
Operating Point Bop Gauss (Typ) 25
Operating Voltage (V) 2.5 to 16
Peak Output Current (mA) 1200
Release Point Brp Gauss (Max) -
Release Point Brp Gauss (Min) -50
Release Point Brp Gauss (Typ) -25
SupplyCurrent (mA) 4
Typical Total RDS(ON)(NMOS and PMOS Combined) 1.7 @ 12V
Typical Zener Breakdown Voltage (V) 35

Related Content

Quality Documentation

Technical Documents

Recommended Soldering Techniques

TN1.pdf