ah293 Diodes, Inc., ah293 Datasheet - Page 3

• Manufacturer Part Number: ah293
• Description: Low Voltage Hall-effect Smart Fan Motor Controller
• Manufacturer: Diodes, Inc.

Block Diagram
Typical Application Circuit
AH293 Rev. 2
Regulator
V
(alarm)
(1.8V/5.75V)
2
Notes: R1, R2: typical
The R, C value need to be fine tuned
based on coils design.
dd
RD
V
Plate
dd
Hall
C1, C2, C3: typical 2.2 F
1.8V/5.75V DC Brush-Less Fan with RD Output Function
Amp.
D1
56
O
R
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
pu
www.diodes.com
μ
GND
3 of 10
5
Automatic recovery
Lock shutdown
1
Control Logic
D2
and
2
293
C3
3
4
RD
5
1
GND
Coil
R1
C1
2
Coil
R2
3
4
C2
1
DOB
DO
CONTROLLER
©
JANUARY 2007
Diodes Incorporated
AH293