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AH288

HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER


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AH288 pdf
Features
AH288
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
General Description
On chip Hall sensor
Rotor-locked shutdown
Automatically restart
Frequency generator (FG) output
Built-in Zener protection for output driver
Operating voltage: 3.8V~28V
Output current: IO(AVE) = 400mA
Lead Free Package: SOT89-5L (Note 1)
SOT89-5L: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 2)
AH288 is a monolithic fan motor controller with Hall sensor’s
capability. It contains two complementary open-drain transistors
as motor coil drivers, automatic lock current shutdown, and
recovery protections. Additional, frequency generator (FG) output
is for speed detection 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
Vdd (24V)
D2
D1 Rpu
FG
D3 C1
* Rpu : typical 10 Kohm
54
288
123
GND
Coil2
Coil1
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 DC Brush-less Fan with FG output function
AH288 Rev. 12
DS31040
1 of 9
www.diodes.com
APRIL 2010
© Diodes Incorporated



No Preview Available !

AH288 pdf
Ordering Information
AH288
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
AH288 - Y L - 13
Package
Y : SOT89-5L
Lead Free
L : Lead Free (Note 1)
G : Green
Packing
13 : Tape & Reel
Device
AH288-YL-13
AH288-YG-13
Package
Code
Y
Y
Packaging
(Note 3)
SOT89-5L
SOT89-5L
13” Tape and Reel
Quantity
Part Number Suffix
2500/Tape & Reel
-13
2500/Tape & Reel
-13
Notes:
1. AH288-YL-13 will be replaced by AH288-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 Assignments
( Top View )
Vdd 1
5 FG
GND 2 288
DO 3
47 DOB
SOT89-5L
Pin Descriptions
Pin Name
Vdd
GND
DO
DOB
FG
Pin No.
1
2
3
4
5
Description
Input power
Ground
Output pin
Output pin
Frequency generation
AH288 Rev. 12
DS31040
2 of 9
www.diodes.com
APRIL 2010
© Diodes Incorporated



Part Number AH288
Description HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Maker Diodes Incorporated - Diodes Incorporated
Total Page 9 Pages
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