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參數資料
型號: ADT7476AARQZ-R
廠商: ON Semiconductor
文件頁數: 35/66頁
文件大?。?/td> 945K
描述: IC REMOTE THERMAL CTLR 24QSOP
產品變化通告: MFG CHG Notification ADI to ON Semi
QSOP 24ld Pkg (MSL) Change 17/Jun/2010
標準包裝: 2,500
系列: dBCool®
功能: 風扇控制,溫度監控器
傳感器類型: 內部和外部
感應溫度: -40°C ~ 125°C
精確度: ±2.5%
拓撲: ADC,比較器,風扇速度計數器,多路復用器,寄存器庫
輸出類型: SMBus?
輸出警報:
輸出風扇:
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)
供應商設備封裝: 24-QSOP
包裝: 帶卷 (TR)
其它名稱: ADT7476AARQZ-R-ND
ADT7476AARQZ-ROSTR
ADT7476A
http://onsemi.com
35
Step 2  Configuring the Mux
After the system hardware configuration is determined,
the fans can be assigned to particular temperature channels.
Not only can fans be assigned to individual channels, but the
behavior of the fans is also configurable. For example, fans
can be run under automatic fan control, manually (under
software control), or at the fastest speed calculated by
multiple temperature channels. The mux is the bridge
between temperature measurement channels and the three
PWM outputs.
Bits [7:5] (BHVR) of Register 0x5C, Register 0x5D, and
Register 0x5E (PWM configuration registers) control the
behavior of the fans connected to the PWM1, PWM2, and
PWM3 outputs. The values selected for these bits determine
how the mux connects a temperature measurement channel
to a PWM output.
Automatic Fan Control Mux Options
[7:5] (BHVR), Register 0x5C, Register 0x5D,
Register 0x5E.
000 = Remote 1 temperature controls PWMx
001 = Local temperature controls PWMx
010 = Remote 2 temperature controls PWMx
101 = Fastest speed calculated by local and Remote 2
temperature controls PWMx
110 = Fastest speed calculated by all three
temperature channels controls PWMx
The fastest speed calculated options pertain to controlling
one PWM output based on multiple temperature channels.
The thermal characteristics of the three temperature zones
can be set to drive a single fan. An example would be the fan
turning on when Remote 1 temperature exceeds 60癈 or if
the local temperature exceeds 45癈.
Other Mux Options
[7:5] (BHVR), Register 0x5C, Register 0x5D,
Register 0x5E.
011 = PWMx runs full speed
100 = PWMx disabled (default)
111 = Manual mode. PWMx is running under
software control. In this mode, PWM current
duty cycle registers (0x30 to 0x32) are writable
and control the PWM outputs.
Figure 51. Assigning Temperature Channels to Fan Channels
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
MUX
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ADT7476AARQZ-REEL7 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝:1 系列:- 功能:溫度監控系統(傳感器) 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C,外部傳感器 精確度:±2.5°C 本地(最大值),±5°C 遠程(最大值) 拓撲:ADC,比較器,寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6
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ADT7476ARQH-REEL 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor
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