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AH287

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER


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AH287 pdf
Features
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
General Description
On Chip Hall Sensor
Rotor-Locked Shutdown
Automatically Restart
Built-in Zener Protection for Output Driver
Operating Voltage: 3.8V~28V
Output Current: IO(AVE) = 400mA
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)
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 shutdown detection circuit turns off the output 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.
Typical Application Circuit
24V D2
287
D1
12 34
GND
D3 C1
DO
DOB
L2 L1
48V
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, VZ =27V. Which C1and D3 value need to be fine tuned to optimize
design for different coils and power suppliers.
24V Brush-Less DC Fan
AH287 Rev. 10
DS31042
1 of 11
www.diodes.com
APRIL 2010
© Diodes Incorporated



No Preview Available !

AH287 pdf
Ordering Information
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
AH 287 - X X - X
Package
P : SIP-4L
Y : SOT89-5L
Lead Free
L : Lead Free (Note 1)
G : Green
Packing
B : Bulk
13 : Tape & Reel
Device
AH287-PL-B
AH287-PG-B
AH287-YL-13
AH287-YG-13
Package Packaging
Code
(Note 3)
P SIP-4L
P SIP-4L
Y SOT89-5L
Y SOT89-5L
Bulk
Quantity
Part Number
Suffix
1000
-B
1000
-B
NA NA
NA NA
13” Tape and Reel
Quantity
Part Number
Suffix
NA NA
NA NA
2500/Tape & Reel
-13
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.
Pin Assignment
( Top View )
287
12 3 4
SIP-4L
1 : Vdd
2 : DO
3 : DOB
4 : GND
( Top View )
Vdd 1
GND 2
287
5 NC
DO 3
74 DOB
SOT89-5L
AH287 Rev. 10
DS31042
2 of 11
www.diodes.com
APRIL 2010
© Diodes Incorporated



Part Number AH287
Description HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Maker Diodes Incorporated - Diodes Incorporated
Total Page 11 Pages
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