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General Description

AH287 is a monolithic fan motor controller with Hall sensor’s capability. It contains two complementary open-drain drivers for motor’s coil driving, automatic lock shutdown and restart function relatively.

To avoid coil burning, rotor-lock shutdown detection

circuit shut down the output driver if the rotor is blocked and then the automatic recovery circuit will try to restart the motor. This function repeats while rotor is blocked. Until the blocking is removed, the motor recovers running normally.

Features

- On chip Hall sensor

- Rotor-locked shutdown

- Automatically restart

- Built-in Zener protection for output driver

- Operating voltage: 3.8V~28V

- Output current: IO(AVE) = 400mA

- Package: SIP-4L, SOT89-5L