ah284 Diodes, Inc., ah284 Datasheet - Page 3

• Manufacturer Part Number: ah284
• Description: Hall-effect Smart Fan Motor Controller
• Manufacturer: Diodes, Inc.

Typical Application Circuit
Absolute Maximum Ratings
AH284 Rev. 5
Note:
θ
JA
Symbol
I
I
O (PEAK)
O (AVE)
(Note 4)
V
T
4.
T
P
T
dd
OP
ST
θ
D
J
JA
12V
should be confirmed with what heat sink thermal resistance. If no heat sink contacting,
Notes: R1, R2: typical 56 Ohm.
Supply Voltage
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
Maximum Junction Temperature
Thermal Resistance Junction-to-Case
D3
C1, C2, C3: typical 2.2µF, E-Cap. is recommended.
The R, C value need to be fine tuned based on coils design.
D3 is a Zener diode, not to exceed the absolute maximum
rating voltage.
V
dd
D1
C3
T
J
Characteristics
12V Brush-Less DC Fan
HALL-EFFECT SMART FAN MOTOR CONTROLLER
1
www.diodes.com
D2
DO
(T
A
2
284
= 25°C)
T
A
3 of 9
3
θ
JA
4
GND
θ
SOT89-5L
SOT89-5L
SOT89-5L
JC
SIP-4L
I
SIP-4L
SIP-4L
O (PEAK)
DOB
θ
Tc
JA
is almost the same as
R1
C1
L2
-40 ~ 100
-55 ~ 150
Rating
500
500
700
550
800
150
227
156
24
DECEMBER 2007
C2
θ
R2
©
L1
JC.
Diodes Incorporated
AH284
.
°C/W
Unit
mW
mA
°C
°C
°C
V