AH287 PDF Datasheet


Please enter the part number you wish to PDF download in the search bar.


scroll

Description

This is HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER. Features AH287 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER General Description 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 Lead Free Packages: SIP-4L and SOT89-5L (Note 1) SIP-4L and SOT89-5L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish, RoHS Compliant (Note 2) 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. 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. Typical Application Circuit 24.