AH287
High Voltage Hall-Effect Smart Fan Motor Controller
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
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
Pin Assignment
287
1 2
4
3
1 : VCC
2 : DO
3 : DOB
4 : GND
Front View
SIP-4L
1
2
3
74
5
DOB
DO
GND
NC
VCC
SOT89-5L
287
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 Descriptions
Name
Description
VCC Input
power
DO Output
pin
DOB Output
pin
GND Ground
NC Not
connected
Ordering Information
AH287 X - X X X
Packing
Blank : Tube or Bulk
A : Tape & Reel
P: SIP-4L
Y: SOT89-5L
Package
Lead
L : Lead Free
Blank: Normal
Wafer Body
Blank or
A~Z : if necessary
to specify
AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw
Rev 0.1 Jan 17, 2005
2/7
Block Diagram (SIP4)
Hall
Plate
Control Logic
Regulator
Lock shutdown
and
Automatic recovery
VCC
DOB
DO
Amp.
1
2
3
4
GND
Typical Application Circuit (SIP4)
VCC
DOB
DO
24V
L2
L1
GND
287
1
2
3
4
D2
48V
48V
C1=1uF
D1
24V brush-less DC fan
AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw
Rev 0.1 Jan 17, 2005
3/7
Absolute Maximum Ratings
(Ta = 25
C)
Characteristics
Symbol
Rating
Unit
Supply Voltage
V
CC
30
V
I
O(AVE)
SIP4/SOT89-5 400
Output Current
I
O(PEAK)
700
mA
SIP4 550
Power Dissipation
P
D
SOT89-5 800
mW
Operating Temperature
Topr
-40 ~ 100
C
Storage Temperature
Tstg
-55 ~ 150
C
Maximum Junction Temp.
Tj
150
C
SIP4 227
C/W
Thermal Resistance
jc
SOT89-5 156
C/W
Electrical Characteristics
(
Ta = 25
C, V
CC
=24V, unless otherwise specified)
Characteristics
Symbol
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
Vcc
Operating
3.8
-
28*
V
Supply current
Icc
Operating
-
2.0
4.0
mA
Output Leakage Current
Ioff
V
OUT
=24V -
<
0.1
10
A
Locked Protection On
Tlrp-on
0.4
0.46
0.6
Sec
Locked Protection Off
Tlrp-off
2.4
2.76
3.6
Sec
I
O
=200mA -
450
700
Output saturation voltage
)
sat
(
OUT
V
I
O
=300mA -
680
800
mV
Output On resistance
Rds(on)
I
O
=200mA -
2.25
3.5
ohm
Output Zener-breakdown Voltage
Vz
42
55
65
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
Bop
10
30
60
Gauss
Release Point
Brp
-60
-30
-10
Gauss
Hysteresis Bhy
--
60
--
Gauss
AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw
Rev 0.1 Jan 17, 2005
4/7
Operating Characteristics
DOB DO
24
20
16
12
8
4
OFF
OP
RP
ON
Out
put
V
o
l
t
a
ge i
n
V
o
l
t
s
24
20
16
12
8
4
OFF
RP
OP
ON
Ou
t
put
V
o
l
t
ag
e i
n
V
o
l
t
s
Bop
Brp
0
Bop
Brp
0
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
Vsat
Vsat
Marking side
S
( SIP4 )
N
Marking side
S
( SOT89-5 )
N
Performance Characteristics (SIP4)
Ta (
C)
25
50
60
70
80
85
90
95
100
Pd
(mW)
550 440 396 352 308 286 264 242 220
Ta (
C)
105
110
115
120
125
130
135
140
150
Pd
(mW)
198 176 154 132 110 88 66 44 0
Power Dissipation Curve
0
100
200
300
400
500
600
0
15
30
45
60
75
90
105
120
135
150
Ta (C)
Pd (mW )
100
AH287
High Voltage Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw
Rev 0.1 Jan 17, 2005
5/7
Performance Characteristics (SOT89-5)
Ta (
C)
25
50
60
70
75
80
85
90
95
100
Pd (mW)
800 640 576
512
480
448
416
384 352 320
Ta (
C)
105
110
115
120
125
130
135
140
145
150
Pd (mW)
288 256 224
192
160
128
96 64 32 0
P o w e r D i s s i p a t i o n C u r v e
0
1 0 0
2 0 0
3 0 0
4 0 0
5 0 0
6 0 0
7 0 0
8 0 0
9 0 0
0
2 5
5 0
7 5
1 0 0
1 2 5
1 5 0
T a ( C )
P d ( m W )
Marking Information
(1)SIP-4L
287
Part Number
Year:
( Top View )
"2" = 2002
"1" = 2001
X XX X X
Nth week: 01~52
ID Code
Blank : normal
L : Lead Free Package
(2)SOT89-5L
1
2
3
5
7
4
287 Y M X
M : Month: A~L
Y : Year: 0-9
ID code
A~Z : Non-Lead Free
a~z : Lead Free
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