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ADT7462ACPZ-R7 数据表(PDF) 34 Page - ON Semiconductor

部件名 ADT7462ACPZ-R7
功能描述  Flexible Temperature, Voltage Monitor, and System Fan Controller
PDF  81 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

ADT7462ACPZ-R7 数据表(HTML) 34 Page - ON Semiconductor

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34
Figure 52. Assigning Temperature Channels to Fan Channels
MUX
REAR CHASSIS
FRONT CHASSIS
CPU FAN SINK
REMOTE 1 =
AMBIENT TEMP
LOCAL =
VRM TEMP
REMOTE 2 =
CPU TEMP
PWM1
PWM2
TACH1
TACH2
TACH3
PWM3
MUX
THERMAL CALIBRATION
0%
TMIN
TRANGE
THERMAL CALIBRATION
100%
0%
TMIN
TRANGE
THERMAL CALIBRATION
100%
0%
TMIN
TRANGE
TACHOMETER 1
MEASUREMENT
PWM
CONFIG
PWM
MIN
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
PWM
GENERATOR
TACHOMETER 2
MEASUREMENT
PWM
CONFIG
PWM
MIN
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
PWM
GENERATOR
TACHOMETER 3
AND 4
MEASUREMENT
PWM
CONFIG
PWM
MIN
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
PWM
GENERATOR
100%
To overcome fan inertia, the fan is spun up until two valid
TACH rising edges are counted. See the Fan Spin−Up
section for more details. In some cases, primarily for
psycho−acoustic reasons, the fan should never switch off
below TMIN. The corresponding bits in Register 0x25 and
Register 0x26 should be set to keep the fans running at the
PWM minimum duty cycle, if the temperature falls below
TMIN.
TMIN Registers
Register 0x5C, Local Temperature TMIN = 0x9A (90°C)
Register 0x5D, Remote 1 Temperature TMIN = 0x9A (90°C)
Register 0x5E, Remote 2 Temperature TMIN = 0x9A (90°C)
Register 0x5F, Remote 3 Temperature TMIN = 0x9A (90°C)
PWM1 and PWM2 Frequency Register (0x25)
Bit 0 (MIN 1) = 0. PWM1 is off (0% PWM duty cycle) when
temperature is below TMIN − THYST.
Bit 0 (MIN 1) = 1. PWM1 runs at PWM1 minimum duty
cycle below TMIN − THYST.
Bit 1 (MIN 2) = 0. PWM2 is off (0% PWM duty cycle) when
temperature is below TMIN − THYST.
Bit 1 (MIN 2) = 1. PWM2 runs at PWM2 minimum duty
cycle below TMIN − THYST.
PWM3 and PWM4 Frequency Register (0x26)
Bit 0 (MIN 3) = 0. PWM3 is off (0% PWM duty cycle) when
temperature is below TMIN − THYST.
Bit 0 (MIN 3) = 1. PWM3 runs at PWM3 minimum duty
cycle below TMIN − THYST.
Bit 1 (MIN 4) = 0. PWM4 is off (0% PWM duty cycle) when
temperature is below TMIN − THYST.
Bit 1 (MIN 4) = 1. PWM4 runs at PWM4 minimum duty
cycle below TMIN − THYST.



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