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AH287 Datasheet Preview

AH287 Datasheet

High Voltage Hall-Effect Smart Fan Motor Controller

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AH287 pdf
High Voltage Hall-Effect Smart Fan Motor Controller
AH287
„ Features
- On chip Hall sensor
- 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
„ General Description
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.
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
287 Front View
1 : VCC
2 : DO
3 : DOB
4 : GND
12 3 4
SIP-4L
„ Pin Descriptions
Name
VCC
DO
DOB
GND
NC
Description
Input power
Output pin
Output pin
Ground
Not connected
VCC 1
GND 2
287
5 NC
DO 3
74 DOB
SOT89-5L
„ Ordering Information
AH287 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. 0.1 Jan 17, 2005
1/7



Anachip
Anachip

AH287 Datasheet Preview

AH287 Datasheet

High Voltage Hall-Effect Smart Fan Motor Controller

No Preview Available !

AH287 pdf
High Voltage Hall-Effect Smart Fan Motor Controller
„ Block Diagram (SIP4)
VCC
1
Regulator
Lock shutdown
and
Automatic recovery
Hall
Plate
Amp.
Control Logic
AH287
2 DO
3 DOB
4
GND
„ Typical Application Circuit (SIP4)
24V
VCC
D2
287
D1
12 34
GND
C1=1uF
DO
DOB
Anachip Corp.
www.anachip.com.tw
24V brush-less DC fan
2/7
L2 L1
48V
48V
Rev 0.1 Jan 17, 2005


Part Number AH287
Description High Voltage Hall-Effect Smart Fan Motor Controller
Maker Anachip
Total Page 7 Pages
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