參數(shù)資料
型號(hào)： ADT7462ACPZ-500RL7
廠商： ON SEMICONDUCTOR
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 4Cel, SQUARE, SURFACE MOUNT
封裝： 5 X 5 MM, LFCSP-32
文件頁(yè)數(shù)： 33/88頁(yè)
文件大?。?/td> 836K
代理商： ADT7462ACPZ-500RL7
ADT7462
Rev. 2 | Page 39 of 88 | www.onsemi.com
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.
REAR CHASSIS
FRONT CHASSIS
CPU FAN SINK
LOCAL =
VRM TEMP
PWM1
PWM2
TACH1
TACH2
TACH3
PWM3
REMOTE 1 =
AMBIENT TEMP
REMOTE 2 =
CPU TEMP
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%
0%
100%
P
W
M
D
U
T
Y
C
Y
C
L
E
TMIN
05569-
042
Figure 54. Understanding the TMIN Parameter
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