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 „ 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. 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. These protecting actions are repeated and periodic during the blocked period. Until the blocking is removed, the motor recovers running normally. - Package: SIP-4L, SOT23-5L, SOT89-5L „ Pin Assignment NC 5 DOB 4 VCC 1 5 NC AH291 7 4 DOB SOT89-5L 291 Front View 1 : VCC 2 : DO 3 : DOB 291 GND 2 1 2 3 4 4 : GND 1 2 SOT23-5 3 DO DO 3 VCC GND SIP-4L „ Pin Descriptions Name VCC DO DOB GND NC Description Input power Output pin Output pin Ground Not connected „ Ordering Information AH291 X - X X X Wafer Body Blank or A~Z : if necessary to specify Package P: SIP-4L W: SOT23-5L Y: SOT89-5L Lead L : Lead Free Blank: Normal Packing Blank : Tube or Bulk A : Tape & Reel This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liab...