Diodes Menu Close
Back to Two Phase


Two Phase 5V/12V All-In-One BLDC Fan and Motor Driver with Output Zener Clamp and Reverse Supply Protection

Contact Sales

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


The AH2984 is a single-chip solution for driving two-coilbrushless direct current (BLDC) fans and motors. The device includes a Hall-effect sensor, dynamic offset correction and two complementary open-drain output drivers with internal Zener diode protection. It is optimized for low start-up voltage. To help protect the motor coils, the AH2984 provides Rotor Lock Protection which shuts down output drives if rotor lock is detected. The device automatically re-starts when the rotor lock is removed. Over temperature shutdown provides thermal protection for the device.


  • Two-coil BLDC Cooling Fans
  • Low Voltage/ Low Power BLDC Motors
  • Product Specifications

    Product Parameters

    Operating Voltage (V) 2.5 to 15 V
    SupplyCurrent (mA) 3.5 mA
    Average OutputDrive Current (mA) 500 mA
    Peak Output Current (mA) 800 mA
    Typical Total RDS(ON)(NMOS and PMOS Combined) 1.0 @ 12V Ω
    Typical Zener Breakdown Voltage (V) 33 V
    Operating Point Bop Gauss (Min) 5
    Operating Point Bop Gauss (Typ) 30
    Operating Point Bop Gauss (Max) 60
    Release Point Brp Gauss (Min) -60
    Release Point Brp Gauss (Typ) -30
    Release Point Brp Gauss (Max) -5
    Lock Detect, Shut-Down and Auto Start Yes
    Frequency Generator (FG) and Rotation Detect - RD
    Operating Ambient Temperature (°C) -40 to 105 °C

    Related Content


    Technical Documents

    Recommended Soldering Techniques


    RoHS CofC