Low Voltage Hall-Effect Smart Fan Motor Controller
AH291
Low Voltage Hall-Effect Smart Fan Motor Controller Features
- On chip Hall sensor - Rotor-locked shutdown - Auto...
Description
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...
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