Ah291 – Diodes AH291 User Manual
Page 3
AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
AH291
Document number: DS31041 Rev. 8 - 2
3 of 9
June 2010
© Diodes Incorporated
Absolute Maximum Ratings
(T
A
= 25
°C)
Symbol
Characteristics
Rating
Unit
Vdd
Operating Supply Voltage
8
V
I
O
Output
Current
I
O(AVE)
SIP-4L 400
mA
SOT89-5L 400 mA
I
O(PEAK)
700
mA
P
D
Power
Dissipation
SIP-4L 550
mW
SOT89-5L 800
mW
T
ST
Storage Temperature
-55 ~ 150
°C
T
J
Maximum Junction Temperature
150
°C
Recommended Operating Conditions
Symbol
Characteristic
Conditions
Min
Max
Unit
Vdd
Supply Voltage (Note 2) Operating
1.8
5.75
V
T
A
Operating Ambient Temperature
Operating
-20
100
°C
Notes: 2. The output of IC will be switched after the supply voltage is over 1.8V, but the magnetic characteristics won't be normal until the
supply is over 2.0V.
Electrical Characteristics
(T
A
= 25
°C, Vdd
= 5V, unless otherwise specified)
Symbol
Characteristics
Conditions
Min
Typ.
Max
Unit
Idd Supply
Current
Operating
- 2.6 4.0
mA
T
RLP-ON
Rotor Lock Protection On Time
-
0.4
-
Sec
T
RLP-OFF
Rotor Lock Protection Off Time
2.4
3
3.6
Sec
)
SAT
(
OUT
V
Output Saturation Voltage
I
O
= 180mA
-
300
-
mV
I
O
= 350mA
-
600
-
mV
R
DS(ON)
Output On Resistance
-
1.75
-
ohm
Vz
Output Zener-Breakdown Voltage
-
15
-
V
Truth Table
IN-
IN+
CT
OUT1
OUT2
Mode
H L L H L
Rotating
L H L L H
Rotating
-
-
H
off
off
Lockup protection activated