AH286
Hall-Effect Smart Fan Motor Controller
Features
- On chip Hall sensor
-
Rotor-locked shutdown
-
Automatically restart
- Rotor-state detection (RD) output
- Buil t-in Zener protection for output driver
- Operating voltage: 3.8V~20 V
- Output current: I
O(AVE)
= 500mA for SIP-5/SOT89-5
- Output current: I
O(AVE)
= 400mA for SOT23-5
- Package: SIP-5L, SOT23-5L, SOT89-5L
General Description
AH286 is a monolithic fan motor controller with Hall
sensor’s capability. It contains two complementary
open-drain transistors for motor’s coil driving,
automatic lock current shutdown, and recovery
protections. In addition, rotor-state detection (RD)
output is for Rotor-state detection.
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
the rotor is blocked. Until the blocking is removed,
the motor recovers running normally.
Pin Configuration
286
( Front View )
1 : RD
2 : Vdd
3 : DO
4 : DOB
5 : GND
1 2 3 4 5
Pin Descriptions
Symbol
RD
Vdd
DO
DOB
GND
Description
Rotor-state detection
Input power
Output pin
Output pin
Ground
SIP-5L
Vdd
5
Vdd 1
GND 2
DO 3
SOT89-5L
286
7 DOB
4
5 RD
286
DOB
4
1
2
3
RD GND DO
SOT23-5
Ordering Information
AH286 X - X X X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP-5L
W: SOT23-5L
Y: SOT89-5L
Lead
L : Lead Free
Packing
Blank : Bulk
A : Tape & Reel
(for SOT Packages Only)
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. 1.0 Sep 29, 2005
1/9
AH286
Hall-Effect Smart Fan Motor Controller
Block Diagram (SIP5)
Vdd
2
Lock shutdown
and
Automatic recovery
Regulator
3
Hall
Plate
DO
Amp.
Control Logic
4
DOB
5
GND
1
RD
Typical Application Circuit (SIP5)
D2
Vdd
(12V)
R
pu
D1
1
2
286
Coil2
3
4
5
Coil1
RD
(alarm)
C3
Notes: R1, R2: typical 56
Ω
C1, C2, C3: typical 2.2
µ
F
The R, C value need to be fine tuned
base on coils design.
GND
R1
C1
R2
C2
12V DC Brush-less Fan with RD output function
Anachip Corp.
www.anachip.com.tw
2/9
Rev 1.0 Sep 29, 2005
AH286
Hall-Effect Smart Fan Motor Controller
Absolute Maximum Ratings
Characteristics
Supply Voltage
Output Current
I
O(AVE)
(Ta = 25°C)
Symbol
Vdd
SIP5/SOT89-5
SOT23-5
I
O(PEAK)
Power Dissipation
Operating Temperature
Storage Temperature
Maximum Junction Temp.
Thermal Resistance
θjc
P
D
Topr
Tstg
Tj
SIP5
SOT23-5
SOT89-5
SIP5
SOT23-5
SOT89-5
Rating
24
500
400
700
550
230
800
-40 ~ 100
-55 ~ 150
150
227
543
156
Unit
V
mA
mW
°C
°C
°C
°C/W
Electrical Characteristics
(
Ta = 25
°C,
Vdd = 12V, unless otherwise notice)
Characteristics
Supply Voltage
Supply current
Output Leakage Current
Locked Protection On
Locked Protection Off
Output saturation voltage
Output On resistance
RD output Vds
Output Zener-breakdown Voltage
Symbol
Vdd
Idd
Ioff
Tlrp-on
Tlrp-off
V
OUT( sat )
Conditions
Operating
Operating
V
OUT
=24V
Min.
3.8
-
-
0.4
2.4
Typ.
-
2.0
< 0.1
0.5
3
375
625
1.25
0.5
42
Max.
20
4.0
10
0.6
3.6
500
900
1.67
-
60
Unit
V
mA
µA
Sec
Sec
mV
ohm
V
V
I
O
=300mA
I
O
=500mA
I
O
=300mA
I
O
=10mA
-
-
-
-
35
Rds(on)
Vol
Vz
Magnetic Characteristics
(
Ta = 25
°C,
Vdd = 12V, unless otherwise specified)
(1mT=10 Gauss)
Characteristics
Operate Point
Release Point
Hysteresis
Symbol
Bop
Brp
Bhy
Min.
10
-60
--
Typ.
30
-30
60
Max.
60
-10
--
Unit
Gauss
Gauss
Gauss
Anachip Corp.
www.anachip.com.tw
3/9
Rev 1.0 Sep 29, 2005
AH286
Hall-Effect Smart Fan Motor Controller
Operating Characteristics
DOB
DO
Output Voltage in Volts
RP
OFF
Output Voltage in Volts
12
10
8
6
4
2
OFF
12
10
8
6
4
2
OP
ON
OP
Vsat
RP
ON
Vsat
Brp
0
Bop
Brp
0
Bop
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
S
S
Marking side
S
Marking side
Marking side
N
( SOT23-5 )
N
( SIP5 )
N
( SOT89-5 )
Performance Characteristics (SIP5)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
P d (m W )
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T a (。 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
P o w e r D is s ip a tio n C u rve
Anachip Corp.
www.anachip.com.tw
4/9
Rev 1.0 Sep 29, 2005
AH286
Hall-Effect Smart Fan Motor Controller
Performance Characteristics (SOT23-5)
Ta (°C)
Pd (mW)
25
230
50
184
60
166
70
147
80
129
90
110
100
92
110
74
120
55
130
37
140
18
150
0
P d (m W )
P o w e r D is s ip a tio n C u rv e
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
Performance Characteristics (SOT89-5)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
P d (m W )
25
800
105
288
50
640
110
256
60
576
115
224
70
512
120
192
75
480
125
160
80
448
130
128
85
416
135
96
90
384
140
64
95
352
145
32
100
320
150
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 )
Anachip Corp.
www.anachip.com.tw
5/9
Rev 1.0 Sep 29, 2005
Analog electronics
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