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OCH2981

Part Number	OCH2981
Manufacturer	Orient Chip
Description	Two Phase Hall-Effect Smart Fan Motor Controller
Published	Oct 17, 2018
Detailed Description	OCH2981 Two Phase Hall-Effect Smart Fan Motor Controller ◼ General Description The OCH2981 is a single-chip solution fo...
Datasheet	OCH2981 PDF File

Overview

OCH2981 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 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 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.
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