參數(shù)資料
型號: ADT7476AARQZ-R
廠商: ON Semiconductor
文件頁數(shù): 36/66頁
文件大小: 945K
描述: IC REMOTE THERMAL CTLR 24QSOP
產(chǎn)品變化通告: MFG CHG Notification ADI to ON Semi
QSOP 24ld Pkg (MSL) Change 17/Jun/2010
標(biāo)準(zhǔn)包裝: 2,500
系列: dBCool®
功能: 風(fēng)扇控制,溫度監(jiān)控器
傳感器類型: 內(nèi)部和外部
感應(yīng)溫度: -40°C ~ 125°C
精確度: ±2.5%
拓?fù)洌?/td> ADC,比較器,風(fēng)扇速度計數(shù)器,多路復(fù)用器,寄存器庫
輸出類型: SMBus?
輸出警報:
輸出風(fēng)扇:
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 24-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 24-QSOP
包裝: 帶卷 (TR)
其它名稱: ADT7476AARQZ-R-ND
ADT7476AARQZ-ROSTR
ADT7476A
http://onsemi.com
36
Mux Configuration Example
This is an example of how to configure the mux in a
system using the ADT7476A to control three fans. The CPU
fan sink is controlled by PWM1, the front chassis fan is
controlled by PWM2, and the rear chassis fan is controlled
by PWM3. The mux is configured for the following fan
control behavior:
?SPAN class="pst ADT7476AARQZ-R_2298076_3"> PWM1 (CPU fan sink) is controlled by the fastest speed
calculated by the local (VRM temperature) and
Remote 2 (processor) temperature. In this case, the
CPU fan sink is also being used to cool the VRM.
?SPAN class="pst ADT7476AARQZ-R_2298076_3"> PWM2 (front chassis fan) is controlled by the Remote 1
temperature (ambient).
?SPAN class="pst ADT7476AARQZ-R_2298076_3"> PWM3 (rear chassis fan) is controlled by the Remote 1
temperature (ambient).
Example Mux Settings
[7:5] (BHVR), PWM1 Configuration Register (0x5C).
101 = Fastest speed calculated by local and Remote 2
temperature controls PWM1
[7:5] (BHVR), PWM2 Configuration Register (0x5D).
000 = Remote 1 temperature controls PWM2
[7:5] (BHVR), PWM3 Configuration Register (0x5E).
000 = Remote 1 temperature controls PWM3
These settings configure the mux, as shown in Figure 52.
Figure 52. Mux Configuration Example
THERMAL CALIBRATION
REMOTE1 =
AMBIENT TEMP
100%
0%
T
MIN
T
RANGE
PWM
MIN
MUX
S
TACHOMETER1
MEASUREMENT
S
S
PWM
MIN
PWM
MIN
THERMAL CALIBRATION
100%
0%
T
MIN
T
RANGE
THERMAL CALIBRATION
100%
0%
T
MIN
T
RANGE
LOCAL =
VRM TEMP
REMOTE2 =
CPU TEMP
TACHOMETER2
MEASUREMENT
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
TACHOMETER3
AND 4
MEASUREMENT
PWM
CONFIG
PWM
GENERATOR
PWM1
PWM2
PWM3
TACH3
TACH2
TACH1
CPU FAN SINK
FRONT CHASSIS
REAR CHASSIS
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
RAMP
CONTROL
(ACOUSTIC
ENHANCEMENT)
PWM
CONFIG
PWM
GENERATOR
PWM
CONFIG
PWM
GENERATOR
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