Diodes Incorporated
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AH288 (Not Recommended for new design)

NRND = Not Recommended for New Design

Two Phase 9V/12V/24V BLDC All-In-One Fan and Motor Driver with Output Zener Clamp

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AH288 is a monolithic fan motor controller with Hall sensor’s capability. It contains two complementary open-drain transistors as motor coil drivers, automatic lock current shutdown, and recovery protections. Additional, frequency generator (FG) output is for speed detection relatively. Rotor-lock shutdown detection circuit turns off the output driver when the rotor is blocked to avoid coil overheat. Then, the automatic recovery circuit will restart the motor. These protected actions are repeated and periodic during the blocked period. Until the blocking is removed, the motor recovers and runs normally.


  • On chip Hall sensor
  • Rotor-locked shutdown
  • Automatically restart
  • Frequency generator (FG) output
  • Built-in Zener protection for output driver
  • Operating voltage: 3.8V to 28V
  • Output current: IO(AVE) = 400mA
  • Lead Free Package: SOT89-5L
  • SOT89-5L: Available in “Green” Molding Compound (No Br, Sb)
  • Lead Free Finish/RoHS Compliant
  • Product Specifications

    Product Parameters

    Average OutputDrive Current (mA) 500
    Frequency Generator (FG) and Rotation Detect FG
    Lock Detect, Shut-Down and Auto Start Yes
    Operating Ambient Temperature (°C) -40 to 100
    Operating Point Bop Gauss (Max) 60
    Operating Point Bop Gauss (Min) 10
    Operating Point Bop Gauss (Typ) 30
    Operating Voltage (V) 3.8 to 28
    Peak Output Current (mA) 700
    Release Point Brp Gauss (Max) -10
    Release Point Brp Gauss (Min) -60
    Release Point Brp Gauss (Typ) -30
    SupplyCurrent (mA) 2
    Typical Total RDS(ON)(NMOS and PMOS Combined) 2.25 @ 24V
    Typical Zener Breakdown Voltage (V) 55

    Related Content

    Quality Documentation

    Technical Documents

    Recommended Soldering Techniques


    RoHS CofC

    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2505 2021-01-26 2021-07-26 Device End of Life (EOL)