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AH287 Datasheet(PDF) 1 Page - Diodes Incorporated

Part No. AH287
Description  HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
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Maker  DIODES [Diodes Incorporated]
Homepage  http://www.diodes.com
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AH287 Datasheet(HTML) 1 Page - Diodes Incorporated

 
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
AH287 Rev. 10
1 of 11
APRIL 2010
DS31042
www.diodes.com
© Diodes Incorporated
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
DOB
DO
24V
L2
L1
GND
287
12
3
4
D2
48V
48V
C1
D1
D3
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
Features
General Description


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