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AH284
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~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
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 Assignment
284 Front View
1 : VCC 2 : DO 3 : DOB 12 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 5 DOB 4
VCC 1 GND 2 DO 3 SOT89-5L 284
5 NC 284 7 DOB 4
1 NC
2
3
GND DO SOT23-5
Ordering Information
AH284 X - X X X
Wafer Body Blank or A~Z : if necessary to specify
Package P: SIP-4L W:SOT23-5L 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. 0.5 Jan 17, 2005 1/9
AH284
Hall-Effect Smart Fan Motor Controller Block Diagram (SIP4)
VCC 1
Lock shutdown and Automatic recovery Regulator
2
Hall Plate
DO
Amp.
Control Logic
3
DOB
4 GND
Typical Application Circuit (SIP4)
12V VCC D2
D1
284
L2 L1
1
2
3
4 GND
C3 DO
Notes: R1, R2: typical 56 C1, C2, C3: typical 2.2F The R, C value need to be fine tuned base on coils design.
DOB
R1 C1
R2 C2
12V brush-less DC fan
Anachip Corp. www.anachip.com.tw 2/9
Rev 0.5 Jan 17, 2005
AH284
Hall-Effect Smart Fan Motor Controller Absolute Maximum Ratings
Characteristics Supply Voltage Output Current IO(AVE) (Ta = 25C) Symbol VCC SIP4/SOT89-5 SOT23-5 IO(PEAK) Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temp. Thermal Resistance jc PD SIP4 SOT23-5 SOT89-5 Topr Tstg Tj SIP4 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, VCC =12V, 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 VOUT=24V Min. 3.8 0.4 2.4 35 Typ. 2.0 < 0.1 0.5 3 375 625 1.25 42 Max. 20 4.0 10 0.6 3.6 500 900 1.67 60 Unit V mA A Sec Sec
VOUT( sat ) Rds(on) Vz
Output On resistance Output Zener-breakdown Voltage
IO=300mA IO=500mA IO=300mA
mV ohm V
Magnetic Characteristics (Ta = 25 C, VCC = 12V, 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 3/9
Rev 0.5 Jan 17, 2005
AH284
Hall-Effect Smart Fan Motor Controller Operating Characteristics
DOB DO
Output Voltage in Volts
Output Voltage in Volts
RP
12 10 8 6 4 2
OFF
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
( SIP4 )
N
( SOT89-5 )
Performance Characteristics (SIP4)
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 )
Anachip Corp. www.anachip.com.tw 4/9
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
Rev 0.5 Jan 17, 2005
AH284
Hall-Effect Smart Fan Motor Controller Performance Characteristics (SOT23-5)
Ta (C) 25 50 60 70 80 90 100 110 120 130 140 150
Pd (mW)
P d (m W )
230
184
166
147
129
110
92
74
55
37
18
0
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) 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 )
Anachip Corp. www.anachip.com.tw 5/9
Rev 0.5 Jan 17, 2005
AH284
Hall-Effect Smart Fan Motor Controller Marking Information
(1)SIP-4L
( Top View ) Part Number
284 X XX X X
Blank : normal L : Lead Free Package ID Code Nth week: 01~52 Year: "1" = 2001 "2" = 2002
(2)SOT23-5L
(Top View) ID code A~Z: Non-Lead Free a~z: Lead Free R4:AH284 Date code Y : Year M :Month(A~L)
XX YM X
(3)SOT89-5L
5
4
7
284 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 6/9
Rev 0.5 Jan 17, 2005
AH284
Hall-Effect Smart Fan Motor Controller Package Information
(1)SIP-4L
Active Area Depth
Marking side
Package Sensor Location
1.97mm 1.04mm
0.7mm
1
2
3
4
Package Dimension
5 -7 1.55mm +/-0.1mm 1.03mm +/-0.1 0.30mm +/-0.1mm 3 -5
o
o
o
14.25mm +/-1.25mm 0.38mm +/-0.03mm
o
3.65mm +/-0.1mm
0.46mm +/-0.03mm
0.41mm +/-0.03mm 3.81mm +/-0.03mm
5.22mm +/-0.1mm 4.20mm +/-0.1mm
5 -7
o
o
3 -5
o
o
284
0.2mm Max. 1.42mm+/-0.1mm
1.27mm +/-0.03mm
Anachip Corp. www.anachip.com.tw 7/9
Rev 0.5 Jan 17, 2005
AH284
Hall-Effect Smart Fan Motor Controller
(2) SOT23-5L
D e1
1(4x)
5
4 0.10 C 5x Seating Plane
E1 Y 1 X e 2 3 b
E
A
A2
A1
2(4x)
With Plating
b1
C
C1
Gauge Plane 0.25 mm
Base Metal
b
L L1
Symbol
Dimensions In Millimeters Min. 1.05 0.05 1.00 0.25 0.25 0.08 0.08 2.70 2.60 1.50 0.35 Nom. 1.20 0.10 1.10 0.40 0.11 2.85 2.80 1.60 0.45 0.60 Ref. 0.95 Bsc. 1.90 Bsc. 5o 5o 8o 1.067 0.432 Max. 1.35 0.15 1.20 0.55 0.45 0.20 0.15 3.00 3.00 1.70 0.55
Dimensions In Inches Min. 0.041 0.002 0.039 0.010 0.010 0.003 0.003 0.106 0.102 0.059 0.014 Nom. 0.047 0.004 0.043 0.016 0.004 0.112 0.110 0.063 0.018 0.024 Ref. 0.037 Bsc. 0.075 Bsc. 5o 5o 8o 0.042 0.017 Max. 0.053 0.006 0.047 0.022 0.018 0.008 0.006 0.118 0.118 0.067 0.022
A A1 A2 b b1 c c1 D E E1 L L1 e e1 1 2 X Y
0o 3o 6o -
10o 7o 10o -
0o 3o 6o -
10o 7o 10o -
Anachip Corp. www.anachip.com.tw 8/9
Rev 0.5 Jan 17, 2005
AH284
Hall-Effect Smart Fan Motor Controller
(3) SOT89-5L
A C D F
E
B K
J F L I H G
Package Sensor Location
Y
X
Symbol
A B C D E F G H I J K L X Y
Dimensions In Millimeters Min. Nom. Max. 4.40 4.50 4.60 4.05 4.15 4.25 1.50 1.60 1.70 1.30 1.40 1.50 2.40 2.50 2.60 0.80 3.00 Ref. 1.50 Ref. 0.40 0.46 0.52 1.40 1.50 1.60 0.35 0.39 0.43 5o Typ. 1.90 1.65 -
Dimensions In Inches Min. Nom. Max. 0.173 0.177 0.181 0.159 0.163 0.167 0.059 0.063 0.067 0.051 0.055 0.059 0.094 0.098 0.102 0.031 0.118 Ref. 0.059 Ref. 0.016 0.018 0.020 0.055 0.059 0.063 0.014 0.015 0.017 5o Typ. 0.075 0.065 -
Anachip Corp. www.anachip.com.tw 9/9
Rev 0.5 Jan 17, 2005

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