MAX31785 MAXIM [Maxim Integrated Products], MAX31785 Datasheet - Page 23

• Manufacturer Part Number: MAX31785
• Description: 6-Channel Intelligent Fan Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 1. Automatic Fan Control
Figure 2. Fan Speed Example
TEMP SENSOR 0
TEMP SENSOR 1
TEMP SENSOR 2
TEMP SENSOR 3
REMOTE DIODE
REMOTE DIODE
REMOTE DIODE
TEMP SENSOR
I
2
INTERNAL
C REMOTE
ALLOWS TEMPERATURE ZONE
6-Channel Intelligent Fan Controller
HYSTERESIS
THERMAL
OFFSET ADJUSTMENT
NORMALIZATION
+15°C
+10°C
TEMPERATURE
+5°C
0°C
0°C
SENSOR
T7
T6
T5
T4
T3
T2
T1
T0
ELAPSED TIME
FAN 0 1 2 3 4 5
FAN 0 1 2 3 4 5
FAN 0 1 2 3 4 5
FAN 0 1 2 3 4 5
FAN 0 1 2 3 4 5
TEMP SENSOR INTERNAL
TEMP SENSOR DIODE 0
TEMP SENSOR DIODE 1
TEMP SENSOR DIODE 2
TEMP SENSOR I
TEMP SENSOR TO
SAMPLE 1
FAN MAPPING
SAMPLE 2
SAMPLED TEMPERATURES
2
C 3
TEMPERATURE SAMPLE RATE
SAMPLE 3
(ONCE PER SECOND)
SAMPLE 4
HIGHEST TEMPERATURE
CONTROLS THE FAN
UNIQUE 8-LEVEL LUT
EACH FAN HAS A
FAN SPEED
S7
S6
S5
S4
S3
S2
S1
S0
FAN 2
FAN 5
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