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The AH2985 is a single-chip solution for driving two-coil brushless 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 AH2985 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.
The AH2985 is available in TO94.
Two-Coil BLDC Cooling Fans
Low Voltage - Low Power BLDC Motors
Operating Voltage: 2.5V to 15V
Built-In Hall Sensor and Input Amplifier
Rotor Lock Protection (Lock Detection, Output Shutdown and Automatic Re-Start)