AH287
High 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: 3.8V~28V
- Output current: I
O(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
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
287
5 NC
7 DOB
4
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
AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Absolute Maximum Ratings
Characteristics
Supply Voltage
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
Maximum Junction Temp.
Thermal Resistance
θjc
I
O(AVE)
P
D
(Ta = 25°C)
Symbol
V
CC
SIP4/SOT89-5
I
O(PEAK)
SIP4
SOT89-5
Topr
Tstg
Tj
SIP4
SOT89-5
Rating
30
400
700
550
800
-40 ~ 100
-55 ~ 150
150
227
156
Unit
V
mA
mW
°C
°C
°C
°C/W
°C/W
Electrical Characteristics
(
Ta = 25
°C,
V
CC
=24V, unless otherwise specified)
Characteristics
Supply Voltage
Supply current
Output Leakage Current
Locked Protection On
Locked Protection Off
Output saturation voltage
Symbol
Vcc
Icc
Ioff
Tlrp-on
Tlrp-off
Conditions
Operating
Operating
V
OUT
=24V
Min.
3.8
-
-
0.4
2.4
-
-
-
42
Typ.
-
2.0
< 0.1
0.46
2.76
450
680
2.25
55
Max.
28*
4.0
10
0.6
3.6
700
800
3.5
65
Unit
V
mA
µA
Sec
Sec
V
OUT( sat )
Rds(on)
Vz
Output On resistance
Output Zener-breakdown Voltage
I
O
=200mA
I
O
=300mA
I
O
=200mA
mV
ohm
V
*Note:
Please watch out the current limit issue when the operation voltage is over 26.4V, because of the different efficiency in the coil.
Magnetic Characteristics
(
Ta = 25
°
C, V
CC
= 24V, unless otherwise specified)
(1mT=10 Gauss)
Characteristics
Symbol
Min.
Typ.
Max.
Unit
Operate Point
Release Point
Hysteresis
Bop
Brp
Bhy
10
-60
--
30
-30
60
60
-10
--
Gauss
Gauss
Gauss
Anachip Corp.
www.anachip.com.tw
3/7
Rev 0.1 Jan 17, 2005
AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Operating Characteristics
DOB
DO
Output Voltage in Volts
RP
OFF
Output Voltage in Volts
24
20
16
12
8
4
OFF
24
20
16
12
8
4
OP
ON
OP
Vsat
RP
ON
Vsat
Brp
0
Bop
Brp
0
Bop
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
S
Marking side
S
Marking side
N
( SIP4 )
N
( SOT89-5 )
Performance Characteristics (SIP4)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
Pd (mW )
600
500
400
300
200
100
0
0
15
30
45
60
75
90
105
100
120
135
150
Ta (。C)
25
550
105
198
50
440
110
176
60
396
115
154
70
352
120
132
80
308
125
110
85
286
130
88
90
264
135
66
95
242
140
44
100
220
150
0
Power Dissipation Curve
Anachip Corp.
www.anachip.com.tw
4/7
Rev 0.1 Jan 17, 2005
AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Performance Characteristics (SOT89-5)
Ta (°C)
25
50
60
70
75
80
85
90
95
100
Pd (mW)
Ta (°C)
800
105
640
110
576
115
512
120
480
125
448
130
416
135
384
140
352
145
320
150
Pd (mW)
P d (m W )
288
256
224
192
160
128
96
64
32
0
P o w e r D is s ip a tio n C u r v e
900
800
700
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T a (
。
C )
Marking Information
(1)SIP-4L
( Top View )
Part Number
287
X XX X X
Blank : normal
L : Lead Free Package
ID Code
Nth week: 01~52
Year: "1" = 2001
"2" = 2002
(2)SOT89-5L
5
4
7
287 Y M X
ID code
A~Z : Non-Lead Free
a~z : Lead Free
M : Month: A~L
Y : Year: 0-9
1
2
3
Anachip Corp.
www.anachip.com.tw
5/7
Rev 0.1 Jan 17, 2005
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