AH291

AH291 LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Features On Chip Hall Sensor Rotor-Locked Shutdown Automatically Restart Built-in Zener Protection for Output Driver Operating Voltage: 1.8V~5.75 V Output Current: IO( AVE ) = 400 mA Lead Free Packages: SIP-4L and SOT89-5L General Description AH291 is a monolithic fan motor controller with Hall sensor’s capability. It contains two complementary open-collector 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. Ordering Information AH291 - X X X Package P: SIP-4L Y: SOT89-5L Lead L : Lead Free Packing -B : -7/-13 : Bulk Taping Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device Lead-free Package Code P Y Packaging (Note 2) SIP-4L SOT89-5L Quantity Lead-free AH291-P AH291-Y Tube/Bulk Part Number Suffix 1000 -B NA NA 7” Tape and Reel Part Number Suffix NA NA 2500/Tape & Reel -13 Quantity Note: 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AH291...