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AH291 Datasheet(PDF) 3 Page - Diodes Incorporated

Part # AH291
Description  LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
PDF  10 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AH291 Datasheet(HTML) 3 Page - Diodes Incorporated

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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
AH291 Rev. 3
3 of 10
JANUARY 2007
www.diodes.com
© Diodes Incorporated
Block Diagram
( SIP-4L )
Hall
Plate
Control Logic
Regulator
Lock Shutdown
and
Automatic Recovery
Vdd
DOB
DO
Amp.
1
2
3
4
GND
Typical Application Circuit
Vdd
DOB
DO
GND
1.8V/5.75V
D2
L2
L1
291
12
3
4
D1
R1
R2
C1
C2
O
56
μ
Notes: R1, R2: typical
C1, C2, C3: typical 2.2 F
The R, C value need to be fine tuned
based on coils design .
C3
1.8V/5.75V Brush-Less DC Fan



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