Datasheet Summary
Two Phase Hall-Effect Smart Fan Motor Controller
- General Description
The OCH2981 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 plementary open-drain output drivers with internal Zener diode protection. It is optimized for low start-up voltage.
To help protect the motor coils, the OCH2981 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 OCH2981 is available in SIP4 package.
-...