MAX1669 Datasheet, PDF (17/20 Pages) Maxim Integrated Products – Fan Controller and Remote Temperature Sensor with SMBus Serial Interface

Fan Controller and Remote Temperature Sensor
with SMBus Serial Interface
+5V
10k 10k 10k 10k
0.1µF
2N3906
SMBCLK VCC
SMBDATA
ALERT
OVERT
DXP
2200pF
MAX1669
38k
DXN
FAN
SYNC
ADD0
ADD1
ADD2
AGND
I/O1
I/O2
PGND
+12V
100k
38k
N-CH
IRF7201
SYSTEM POWER
GROUND
Figure 5. Linear Fan Control (DAC Mode) with Fan “Off” at Power-Up
+5V
10k 10k 10k 10k
0.1µF
2N3906
SMBCLK VCC
SMBDATA
ALERT
OVERT
FAN
DXP
2200pF
MAX1669
DXN
SYNC
ADD0
ADD1
ADD2
AGND
I/O1
I/O2
PGND
33k
5.1V
ZENER
+12V
22k
P-CH
IRF7205
100k
SYSTEM POWER
GROUND
Figure 6. Linear Fan Control (DAC Mode) with Fan “On” at Power-Up
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