ah291 Diodes, Inc., ah291 Datasheet - Page 4

• Manufacturer Part Number: ah291
• Description: Low Voltage Hall-effect Smart Fan Motor Controller
• Manufacturer: Diodes, Inc.

Absolute Maximum Ratings
Electrical Characteristics
AH291 Rev. 2
*Note:
Supply Voltage
Supply Current
Lock Protection On
Lock Protection Off
Output Saturation Voltage
Output On Resistance
Output Zener-Breakdown Voltage
Operating Supply Voltage
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
Maximum Junction Temperature
3. 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
Truth Table
over 2.0V.
Characteristics
Characteristics
IN-
H
L
-
IN+
H
L
-
CT
H
L
L
V
Symbol
( T
R
OUT
T
T
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
V
ds(on)
lrp-on
lrp-off
Vz
I
A
www.diodes.com
dd
( T
dd
(SAT
= 25 °C, V
OUT1
A
4 of 10
)
off
= 25°C )
H
P
L
D
dd
Symbol
I
I
O(PEAK)
Topr
O(AVE)
Tstg
V
I
I
OUT2
= 5V, unless otherwise specified )
Conditions
Operating
O
O
Tj
Operating
dd
off
= 180mA
= 350mA
H
L
SOT89-5L
SOT25
SIP-4L
Lockup protection activated
Min.
Rotating
Rotating
1.8*
2.4
Mode
-
-
-
-
-
-
-20 ~ 100
-55 ~ 150
Rating
400
700
550
230
800
150
8
Typ.
1.75
300
600
2.6
0.4
15
3
-
CONTROLLER
DECEMBER 2006
©
Max.
5.75
Diodes Incorporated
4.0
3.6
AH291
-
-
-
-
-
Unit
mW
mA
°C
°C
°C
V
Unit
ohm
Sec
Sec
mA
mV
V
V