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AH287 Datasheet(PDF) 1 Page - Diodes Incorporated |
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AH287 Datasheet(HTML) 1 Page - Diodes Incorporated |
1 / 11 page AH287 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH287 Rev. 10 1 of 11 APRIL 2010 DS31042 www.diodes.com © Diodes Incorporated • 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 DOB DO 24V L2 L1 GND 287 12 3 4 D2 48V 48V C1 D1 D3 Note: The optional Capacitor C1 and Diode D3 are for power stabilization. C1 is recommended to be E-Cap., luF/25V; D3 is recommended to be Zener Diode, VZ =27V. Which C1and D3 value need to be fine tuned to optimize design for different coils and power suppliers. 24V Brush-Less DC Fan Features General Description |
Similar Part No. - AH287_10 |
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Similar Description - AH287_10 |
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