ADT7463 Analog Devices, ADT7463 Datasheet - Page 6

• Manufacturer Part Number: ADT7463
• Description: Dbcool Thermal Management Controller And Voltage Monitor
• Manufacturer: Analog Devices

AN-613
MUX CONFIGURATION EXAMPLE
This is an example of how to configure the MUX in a
system using the ADT7460/ADT7463 to control three
fans. The CPU fan sink is controlled by PWM1, the front
chassis fan is controlled by PWM 2, and the rear chassis
fan is controlled by PWM3. The MUX is configured for
the following fan control behavior:
PWM1 (CPU fan sink) is controlled by the fastest speed
calculated by the Local (VRM Temp) and Remote 2 (pro-
cessor) temperature. In this case, the CPU fan sink is
also being used to cool the VRM.
PWM2 (front chassis fan) is controlled by the Remote 1
temperature (ambient).
PWM3 (rear chassis fan) is controlled by the Remote 1
temperature (ambient).
AMBIENT TEMP
REMOTE 2 =
REMOTE 1 =
VRM TEMP
CPU TEMP
LOCAL =
THERMAL CALIBRATION
THERMAL CALIBRATION
THERMAL CALIBRATION
T
T
T
MIN
MIN
MIN
T
T
T
RANGE
RANGE
RANGE
100%
0%
100%
0%
100%
0%
Figure 6. MUX Configuration Example
MUX
–6–
PWM
MIN
PWM
PWM
MIN
MIN
EXAMPLE MUX SETTINGS
<7:5> (BHVR) PWM1 CONFIGURATION REG 0x5C
101 = Fastest speed calculated by Local and Remote 2
Temp controls PWM1.
<7:5> (BHVR) PWM2 CONFIGURATION REG 0x5D
000 = Remote 1 Temp controls PWM2.
<7:5> (BHVR) PWM3 CONFIGURATION REG 0x5E
000 = Remote 1 Temp controls PWM3.
These settings configure the MUX, as shown in Figure 6.
RAMP CONTROL
ENHANCEMENT)
TACHOMETER 1
RAMP CONTROL
ENHANCEMENT)
MEASUREMENT
TACHOMETER 2
MEASUREMENT
RAMP CONTROL
ENHANCEMENT)
TACHOMETER 3
MEASUREMENT
(ACOUSTIC
(ACOUSTIC
(ACOUSTIC
AND 4
GENERATOR
GENERATOR
GENERATOR
CONFIG
CONFIG
CONFIG
PWM
PWM
PWM
PWM
PWM
PWM
PWM1
TACH1
PWM2
TACH2
PWM3
TACH3
CPU
FAN SINK
FRONT
CHASSIS
REAR
CHASSIS
REV. 0