AH281
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: 10V~20 V, driver start up: 8V
(minimum)
- Output current:
I
O( AVE )
= 300 mA
- Package: SIP-4L, SOT89-5L
General Description
AH281 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. This function repeats while
rotor is blocked. Until the blocking is removed, the
motor recovers running normally.
Pin Assignment
281
Front View
1 : VCC
2 : DO
3 : DOB
1 2
3
4
4 : GND
Pin Descriptions
Name
VCC
DO
DOB
GND
NC
Description
Input power
Output pin
Output pin
Ground
Not connected
SIP-4L
VCC 1
GND 2
DO 3
SOT89-5L
AH281
5 NC
7 DOB
4
Ordering Information
AH281 X - X X X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP-4L
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. 0.7 Apr 16, 2004
1/7
ANACHIP [ ANACHIP CORP ]
