AH284
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. 0.4 Jun 2, 2004
1/9
Features
- On chip Hall sensor
- Rotor-locked shutdown
- Automatically restart
- Built-in Zener protection for output driver
- Operating voltage: 3.5V~20 V
- Output current: IO(AVE) = 500mA for SIP-4/SOT89-5
- Output current: IO(AVE) = 400mA for SOT23-5
- Package: SIP-4L, SOT23-5L, SOT89-5L
Pin Assignment
284
12 43
1 : VCC
2 : DO
3 : DOB
4 : GND
Front View
SIP-4L
1
2
3 7
4
5
DOBDO
GND
NC
VCC
SOT89-5L
284
1 32
5 4
SOT23-5
NC GND DO
DOB
VCC
284
General Description
AH284 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
AH284 X -XX X
Packing
Blank : Tube or Bulk
A : Tape & Reel
P: SIP-4L
W:SOT23-5L
Y: SOT89-5L
Package Lead
L : Lead Free
Blank: Normal
Wafer Body
Blank or
A~Z : if necessary
to specify
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
2/9
Block Diagram (SIP4)
Hall
Plate Control Logic
Regulator
Lock shutdown
and
Automatic recovery
VCC
DOB
DO
Amp.
1
2
3
4
GND
Application Circuit (SIP4)
VCC
DOB
DO
GND
12V D1
L2 L1
284
C1 =10uF
+
12 34
12V brush-less DC fan
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
3/9
Absolute Maximum Ratings (Ta = 25°C)
Characteristics Symbol Rating Unit
Supply Voltage VCC 24 V
SIP4/SOT89-5 500
IO(AVE) SOT23-5 400
Output Current
IO(PEAK) 700
mA
SIP4 550
SOT23-5 230
Power Dissipation PD
SOT89-5 800
mW
Operating Temperature Topr -40 ~ 100 °C
Storage Temperature Tstg -55 ~ 150 °C
Maximum Junction Temp. Tj 150 °C
Electrical Characteristics (Ta = 2 5 °C, VCC =12V, unless otherwise specified)
Characteristics Symbol Conditions Min. Typ. Max. Unit
Supply Voltage Vcc Operating 3.5 - 20 V
Supply current Icc Operating - 2.0 4.0 mA
Output Leakage Current Ioff VOUT=24V - < 0.1 10 µA
Locked Protection On Tlrp-on 0.4 0.5 0.6 Sec
Locked Protection Off Tlrp-off - 3 - Sec
IO=300mA - 375 500
Output saturation voltage )sat(OUT
VIO=500mA - 625 - mV
Output On resistance Rds(on) IO=300mA - 1.25 1.67 ohm
Output Zener-breakdown Voltage Vz - 42 - V
Magnetic Characteristics (Ta = 25 °C, VCC = 12V, unless otherwise specified)
(1mT=10 Gauss)
Characteristics Symbol Min. Typ. Max. Unit
Operate Point Bop -- 30 60 Gauss
Release Point Brp -60 -30 -- Gauss
Hysteresis Bhy -- 60 -- Gauss
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
4/9
Operating Characteristics
DOB DO
12
10
8
6
4
2
OFF
OP
RP
ON
Output Voltage in Volts
12
10
8
6
4
2
OFF
RP
OP
ON
Output Voltage in Volts
BopBrp 0BopBrp 0
Magnetic Flux Density in GaussMagnetic Flux Density in Gauss
Vsat Vsat
Marking side
S
( SIP4 )
N
Marking side
S
( SOT23-5 )
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 255075100125150
Ta (。C)
Pd (mW)
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
5/9
Performance Characteristics (SOT23-5)
Ta (°C) 25 50 60 70 80 90 100 110 120 130 140 150
Pd (mW) 230 184 166 147 129 110 92 74 55 37 18 0
Power Dissipation Curve
0
100
200
300
0 25 50 75 100 125 150
Ta (。C)
Pd (mW)
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
Pow er Dissipation Curve
0
100
200
300
400
500
600
700
800
900
0 25 50 75 100 125 150
Ta (
。C)
Pd (mW )
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
6/9
Marking Information
(1)SIP-4L
284
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)SOT23-5L
R4:AH284
XX YM X
Date code
Y : Year
M :Month(A~L)
(Top View) ID code
A~Z: Non-Lead Free
a~z: Lead Free
(3)SOT89-5L
1 2 3
5
7
4
284 Y M X
M : Month: A~L
Y : Year: 0-9
ID code
A~Z : Non-Lead Free
a~z : Lead Free
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
7/9
Package Information
(1)SIP-4L
Active Area Depth Package Sensor Location
Marking side
0.7mm
1.97mm
1.04mm
1234
Package Dimension
14.25mm
+/-1.25mm
1.03mm
+/-0.1
1.55mm
+/-0.1mm
0.38mm
+/-0.03mm
5.22mm
+/-0.1mm
4.20mm
+/-0.1mm
3.65mm
+/-0.1mm
1.42mm+/-0.1mm
1.27mm
+/-0.03mm
0.41mm
+/-0.03mm
0.30mm
+/-0.1mm
3.81mm
+/-0.03mm
284
0.46mm +/-0.03mm
0.2mm Max.
5
o
-7
o
o
3
o
-5
o
3
o
-55
o
-7
o
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
8/9
(2) SOT23-5L
θ
Gauge Plane
0.25 mm
L
L1
E1 E
e1
D
123
4
5
be
b1
b
CC1
Base
Metal
With
Plating
A2
A1
A
Seating Plane
0.10 C
5x
2(4x)
θ
1(4x)
θ
X
Y
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.05 1.20 1.35 0.041 0.047 0.053
A1 0.05 0.10 0.15 0.002 0.004 0.006
A2 1.00 1.10 1.20 0.039 0.043 0.047
b 0.25 - 0.55 0.010 - 0.022
b1 0.25 0.40 0.45 0.010 0.016 0.018
c 0.08 - 0.20 0.003 - 0.008
c1 0.08 0.11 0.15 0.003 0.004 0.006
D 2.70 2.85 3.00 0.106 0.112 0.118
E 2.60 2.80 3.00 0.102 0.110 0.118
E1 1.50 1.60 1.70 0.059 0.063 0.067
L 0.35 0.45 0.55 0.014 0.018 0.022
L1 0.60 Ref. 0.024 Ref.
e 0.95 Bsc. 0.037 Bsc.
e1 1.90 Bsc. 0.075 Bsc.
θ 0o 5
o 10o 0
o 5
o 10o
θ1 3o 5
o 7
o 3
o 5
o 7
o
θ2 6o 8
o 10o 6
o 8
o 10o
X - 1.067 - - 0.042 -
Y - 0.432 - - 0.017 -
AH284
Hall-Effect Smart Fan Motor Controller
Anachip Corp.
www.anachip.com.tw Rev 0.4 Jun 2, 2004
9/9
(3) SOT89-5L
K
J
L
D
C
A
I
H
G
EB
F
F
Package Sensor Location
X
Y
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 4.40 4.50 4.60 0.173 0.177 0.181
B 4.05 4.15 4.25 0.159 0.163 0.167
C 1.50 1.60 1.70 0.059 0.063 0.067
D 1.30 1.40 1.50 0.051 0.055 0.059
E 2.40 2.50 2.60 0.094 0.098 0.102
F 0.80 - - 0.031 - -
G 3.00 Ref. 0.118 Ref.
H 1.50 Ref. 0.059 Ref.
I 0.40 0.46 0.52 0.016 0.018 0.020
J 1.40 1.50 1.60 0.055 0.059 0.063
K 0.35 0.39 0.43 0.014 0.015 0.017
L 5o T
yp
.5
o T
yp
.
X - 1.90 - - 0.075 -
Y - 1.65 - - 0.065 -
