AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Features
General Description
- On chip Hall sensor
AH287 is a monolithic fan motor controller with Hall
sensor’s capability. It contains two complementary
open-drain drivers for motor’s coil driving, automatic
lock shutdown and restart function relatively.
- Rotor-locked shutdown
- Automatically restart
- Built-in Zener protection for output driver
- Operating voltage: 3.8V~28V
- Output current: IO(AVE) = 400mA
- Package: SIP-4L, SOT89-5L
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. This function repeats while
rotor is blocked. Until the blocking is removed, the
motor recovers running normally.
Pin Assignment
Pin Descriptions
Name
Description
Front View
VCC
Input power
287
DO
Output pin
Output pin
Ground
1 : VCC
2 : DO
DOB
GND
NC
Not connected
3 : DOB
4 : GND
1
2
3
4
SIP-4L
VCC
1
2
NC
5
287
GND
DO 3
7
4
DOB
SOT89-5L
Ordering Information
AH287 X - X X X
Packing
Wafer Body
Package
P: SIP-4L
Lead
Blank or
L : Lead Free
Blank : Tube or Bulk
A~Z : if necessary
to specify
Y: SOT89-5L Blank: Normal
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. 0.1 Jan 17, 2005
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