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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
• Lead Free Packages: SIP-4L and SOT89-5L (Note 1)
• SIP-4L and SOT89-5L: Available in “Green” Molding
Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 2)
O(AVE)
= 400mA
Typical Application Circuit
24V
D1
D2
287
12 34
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.
Rotor-lock shutdow n detection circuit turns off the out put driver
when the rotor is blocked to avoid coil overheat. Then, the
automatic recovery circuit will restart the motor. These protected
actions are repeated and periodic during the blocked period. Until
the blocking is removed, the motor recovers and runs normally.
L2 L1
GND
DOB
D3
C1
48V
DO
48V
Note: The optional Capacitor C1 and Diode D3 are for power stabilization. C1 is recommended to be E -Cap., luF/25V;
D3 is recommended to be Zener Diode , V
design for different coils and power suppliers .
=27V. Which C1and D3 value need to be fine tuned to optimize
Z
24V Brush-Less DC Fan
AH287 Rev. 10 1 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
Page 2
Ordering Information
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
AH 287 - X X - X
AH287
Package
P : SIP-4L
Y : SOT89-5L 13 : Tape & Reel
Device
AH287-PL-B P SIP-4L 1000 -B NA NA
AH287-PG-B P SIP-4L 1000 -B NA NA
AH287-YL-13 Y SOT89-5L NA NA 2500/Tape & Reel -13
AH287-YG-13 Y SOT89-5L NA NA 2500/Tape & Reel -13
Notes: 1. AH287-YL-13 will be replaced by AH287-YG-13
2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
4. Reverse taping as shown on Diodes Inc. Surface Mount (SMD) Packaging document AP02007, which can be found on our website
http://www.diodes.com/datasheets/ap02007.pdf.
Package
Code
Packaging
(Note 3)
Lead Free
L : Lead Free (Note 1)
G : Green
Bulk 13” Tape and Reel
Quantity
Part Number
Suffix
Packing
B : Bulk
Quantity
Part Number
Suffix
Pin Assignment
( Top View )
( Top View )
287
1 : Vdd
2 : DO
3 : DOB
4 : GND
12 43
SIP-4L
AH287 Rev. 10 2 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
Vdd
GND
1
2
287
3 7
SOT89-5L
NC
5
DOBDO
4
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Pin Descriptions
Pin Name Description
Vdd Input Power
DO Output Pin
DOB Output Pin
GND Ground
NC Not Connected
Block Diagram
Vdd
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
AH287
Lock Shutdown
Automatic Recovery
Regulator
and
DO
Hall
Plate
Amp.
Control Logic
DOB
GND
AH287 Rev. 10 3 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
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AH287
)
θ
θ
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Absolute Maximum Ratings (T
= 25°C)
A
Symbol Characteristics Rating Unit
Vdd Supply Voltage 30 V
SIP-4L 400 mA
I
IO Output Current
PD Power Dissipation
O(AVE)
I
700 mA
O(PEAK
SOT89-5L 400 mA
SIP-4L 550 mW
SOT89-5L 800 mW
TST Storage Temperature -55 ~ 150
TJ Maximum Junction Temperature 150
θ
JA
Thermal Resistance Junct ion-to-Case
(Note 5)
SIP-4L 227
SOT89-5L 156
TA
TJ
JA
JC
Tc
°C
°C
°C/W
°C/W
Notes: 5. θJA should be confirmed with what heat sink thermal resistance. If no heat sink contacting, θ
is almost the same as θ
JA
JC.
.
Recommended Operating Conditions
Symbol Characteristic Conditions Min Max Unit
Vdd Supply Voltage (Note 6) Operating 3.8 28 V
TA Operating Ambient Temperature Operating -40 100
Notes: 6. Please watch out the current limit issue when the operation voltage is over 26.4V, because of the different efficiency in the coil.
°C
AH287 Rev. 10 4 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
Page 5
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Electrical Characteristics (T
= 25 °C, Vdd
A
=24V, unless otherwise specified)
Symbol Characteristics
Conditions
Min Typ. Max Unit
Idd Supply Current Operating - 2.0 4.0 mA
I
Output Leakage Current V
OFF
T
LRP-ON
T
LRP-OFF
V
OUT(SAT)
R
DS(ON)
Locked Protection On 0.4 0.46 0.6 Sec
Locked Protection Off 2.4 2.76 3.6 Sec
Output Saturation Voltage
Output On Resistance IO=200mA - 2.25 3.5 ohm
=24V - < 0.1 10 μA
OUT
I
=200mA - 450 700 mV
O
IO=300mA - 680 800 mV
Vz Output Zener-Breakdown Voltage 42 55 65 V
Truth Table
IN- IN+ CT OUT1 OUT2 Mode
H L L H L Rotating
L H L L H Rotating
- - H off off Lockup protection activated
Magnetic Characteristics (TA = 25 °C, Vdd
= 24V, unless otherwise specified, Note 7)
(1mT=10 Gaus s )
Symbol Characteristics Min Typ. Max Unit
Bop Operate Point 10 30 60 Gauss
Brp Release Point -60 -30 -10 Gauss
Bhy Hysteresis -- 60 -- Gauss
Notes: 7. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperat ure and after soldering.
AH287 Rev. 10 5 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
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Operating Characteristics
DOB DO
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
RP
ON
Output Voltage in Vol ts
24
20
16
12
8
4
OFF
OP
Vsat Vsat
OFF
RP
Output Voltage in Volts
Magnetic Flux Density in GaussMagnetic Flux Density in Gauss
24
20
16
12
OP
8
4
ON
BopBrp 0BopBrp 0
S
Marking
side
N
S
Marking
side
N
( SIP-4L )
( SOT89-5L )
AH287 Rev. 10 6 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
Page 7
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
A
Performance Characteristics
(1) SIP-4L
T
(°C)
PD (mW)
TA (°C)
PD (mW)
(mW)
P
D
600
500
400
300
200
25 50 60 70 80 85 90 95 100
550 440 396 352 308 286 264 242 220
105 110 115 120 125 130 135 140 150
198 176 154 132 110 88 66 44 0
Power Dissipation Curve
AH287
CONTROLLER
100
0
0 255075100125150
TA (°C)
(2) SOT89-5L
TA (°C)
PD (mW)
TA (°C)
PD (mW)
25 50 60 70 75 80 85 90 95 100
800 640 576 512 480 448 416 384 352 320
105 110 115 120 125 130 135 140 145 150
288 256 224 192 160 128 96 64 32 0
(mW )
P
D
900
800
700
600
500
400
300
200
100
0
-4 0
0 255075100125150
Power Dissipation Curve
TA (°C)
AH287 Rev. 10 7 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
Page 8
Marking Information
(1) SIP-4L
Part Number
(2) SOT89-5L
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
( Top View )
Y
287
Y WW X
: Year : 0~9
WW
: Week : 01~52, "52" represents
52 and 53 week
X : Internal Code : A~Z : Green
a~z : Lead Free
AH287
( Top View )
5
287 Y W X
1 2 3
4
7
Y : Year : 0~9
: Week : A~Z : 1~26 week;
W
a~z : 27~52 week;
z represents 52 and 53 week
: Internal code
X
A~Z : Green
a~z : Lead Free
AH287 Rev. 10 8 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
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HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
Package Information (All Dimensions in mm)
(1) Package type: SIP-4L
AH287
CONTROLLER
0.7mm
Active Area Depth
Package Dimension
Marking side
1.95士0.1mm
1.1士0.1mm
1234
Sensor Location
AH287 Rev. 10 9 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
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HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
Package Information (Continued)
(2) Package type: SOT89-5L
AH287
CONTROLLER
Sensor Location
AH287 Rev. 10 10 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
Page 11
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED W ARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUI VALENTS UNDER THE LAWS OF ANY JURISDICTION).
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changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any
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Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems
without the express written approval of t he Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with ins t ructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or s ystem whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or
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Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2010, Diodes Incorporated
www.diodes.com
IMPORTANT NOTICE
LIFE SUPPORT
AH287 Rev. 10 11 of 11 APRIL 2010
DS31042 www.diodes.com © Diodes Incorporated
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