AH287(2007) View Datasheet(PDF) - Diodes Incorporated.
Part Name
Description
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AH287 Datasheet PDF : 10 Pages
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Electrical Characteristics (TA = 25 °C, Vdd =24V, unless otherwise specified)
Characteristics
Symbol
Conditions
Min. Typ. Max. Unit
Supply Voltage
Supply current
Output Leakage Current
Locked Protection On
Locked Protection Off
Output saturation voltage
Output On resistance
Output Zener-breakdown Voltage
Vdd
Icc
Ioff
Tlrp-on
Tlrp-off
VOUT( sat )
Rds(on)
Vz
Operating
Operating
VOUT=24V
IO=200mA
IO=300mA
IO=200mA
3.8
-
28* V
-
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
- 2.25 3.5 ohm
42
55
65
V
*Note: Please watch out the current limit issue when the operation voltage is over 26.4V, because of the different efficiency in the coil.
Truth Table
IN-
IN+
H
L
L
H
-
-
CT
OUT1 OUT2
Mode
L
H
L
Rotating
L
L
H
Rotating
H
off
off
Lockup protection activated
Magnetic Characteristics (TA = 25 °C, Vdd = 24V, unless otherwise specified)
Characteristics
Operate Point
Release Point
Hysteresis
Symbol
Bop
Brp
Bhy
Min.
10
-60
--
Typ.
30
-30
60
Max.
60
-10
--
(1mT=10 Gauss)
Unit
Gauss
Gauss
Gauss
AH287 Rev. 4
4 of 10
www.diodes.com
JANUARY 2007
© Diodes Incorporated
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