AH287 Datasheet | Diodes Incorporated

Features 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) = 400m A - Lead Free Packages: SIP-4L and SOT89-5L (Note 1) - SIP-4L and SOT89-5L: Available in “Green” Molding pound (No Br, Sb) - Lead Free Finish/ Ro HS pliant (Note 2) AH287 is a monolithic fan motor controller with Hall sensor’s capability. It contains two plementary 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 24V D2 D1 12 34 GND D3 C1 DO L2 L1 48V 48V Note: The optional Capacitor C1 and Diode D3 are for power stabilization. C1 is remended to be E-Cap., lu F/25V; D3 is remended 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 AH287 Rev. 10 DS31042 1 of 11 .diodes. APRIL 2010 © Diodes Incorporated Ordering Information HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER AH 287 - X X - X Package P : SIP-4L Y : SOT89-5L Lead Free L : Lead Free (Note 1) G : Green Packing B : Bulk 13 : Tape & Reel Device AH287-PL-B AH287-PG-B AH287-YL-13...