Ah285 – Diodes AH285 User Manual
Page 4
AH285
HALL-EFFECT SMART FAN MOTOR CONTROLLER
AH285
Document number: DS31029 Rev. 8 - 2
4 of 9
June 2010
© Diodes Incorporated
Electrical Characteristics
(T
A
= 25
°C, Vdd
= 12V, unless otherwise specified)
Symbol
Characteristics
Conditions
Min
Typ.
Max
Unit
Idd Supply
Current
Operating
- 2 4 mA
I
OFF
Output Leakage Current
V
OUT
=24V -
<
0.1
10
μA
T
RLP-ON
Rotor Lock Protection On Time
0.4
0.5
0.6
Sec
T
RLP-OFF
Rotor Lock Protection Off Time
2.4
3
3.6
Sec
V
OUT(SAT)
Output Saturation Voltage
I
O
= 300mA
-
375
500
mV
I
O
= 500mA
-
625
900
R
DS(ON)
Output On Resistance
I
O
= 300mA
-
1.25
1.67
ohm
V
OL
FG Output Vds
I
O
= 10mA
-
0.5
-
V
Vz
Output Zener-Breakdown Voltage
35
42
60
V
Truth Table
IN-
IN+
CT
OUT1
OUT2
FG
Mode
H L L H L H
Rotating
L H L L H L
Rotating
-
-
H
off
off
-
Lockup protection activated
Magnetic Characteristics
(T
A
= 25
°C, Vdd
= 12V, unless otherwise specified, Note 3)
(1mT = 10 Gauss)
Symbol
Characteristics
Min
Typ.
Max
Unit
Bop Operation
Point
10
30
60
Gauss
Brp Release
Point
-60
-30
-10
Gauss
Bhy Hysteresis
-
60
-
Gauss
Notes: 3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.