AH291-PA Ver la hoja de datos (PDF) - Anachip Corporation
Número de pieza
componentes Descripción
Fabricante
AH291-PA Datasheet PDF : 9 Pages
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Low Voltage Hall-Effect Smart Fan Motor Controller
AH291
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
- Package: SIP-4L, SOT23-5L, SOT89-5L
Pin Assignment
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.
Front View
291
1 : VCC
2 : DO
3 : DOB
12 3 4
4 : GND
SIP-4L
Pin Descriptions
NC
DOB
5
4
291
123
VCC GND DO
SOT23-5
VCC 1
5 NC
GND 2 AH291
DO 3
74 DOB
SOT89-5L
Name
VCC
DO
DOB
GND
NC
Ordering Information
Description
Input power
Output pin
Output pin
Ground
Not connected
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 liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.6 Jan 27, 2005
1/9
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