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PDF AH287 Data sheet ( Hoja de datos )

Número de pieza AH287
Descripción HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Fabricantes Diodes Incorporated 
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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

1 page




AH287 pdf
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Electrical Characteristics (TA = 25 °C, Vdd =24V, unless otherwise specified)
Symbol
Idd
IOFF
TLRP-ON
TLRP-OFF
VOUT(SAT)
RDS(ON)
Vz
Truth Table
IN-
H
L
-
Characteristics
Supply Current
Output Leakage Current
Locked Protection On
Locked Protection Off
Output Saturation Voltage
Output On Resistance
Output Zener-Breakdown Voltage
Conditions
Operating
VOUT=24V
IO=200mA
IO=300mA
IO=200mA
Min Typ. Max Unit
- 2.0 4.0 mA
- < 0.1 10 μA
0.4 0.46 0.6 Sec
2.4 2.76 3.6 Sec
- 450 700 mV
- 680 800 mV
- 2.25 3.5 ohm
42 55 65
V
IN+
CT
OUT1
OUT2
L LH
L
HL L
H
- H off off
Mode
Rotating
Rotating
Lockup protection activated
Magnetic Characteristics (TA = 25 °C, Vdd = 24V, unless otherwise specified, Note 7)
(1mT=10 Gauss)
Symbol
Characteristics
Min Typ.
Max
Unit
Bop Operate Point
Brp Release Point
Bhy Hysteresis
10 30
-60 -30
-- 60
60 Gauss
-10 Gauss
-- Gauss
Notes: 7. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering.
AH287 Rev. 10
DS31042
5 of 11
www.diodes.com
APRIL 2010
© Diodes Incorporated

5 Page





AH287 arduino
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any
liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated
convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products
described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the
companies whose products are represented on Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized
sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized
application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems
without the express written approval of the 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 instructions 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 system 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 devices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
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
AH287 Rev. 10
DS31042
11 of 11
www.diodes.com
APRIL 2010
© Diodes Incorporated

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