參數(shù)資料
型號(hào)： ADT7476ARQZ-REEL7
廠商： ANALOG DEVICES INC
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
封裝： ROHS COMPLIANT, MO-137AE, QSOP-24
文件頁(yè)數(shù)： 43/72頁(yè)
文件大?。?/td> 5219K
代理商： ADT7476ARQZ-REEL7
ADT7476
Rev. B | Page 48 of 72
TEMPERATURE ABOVE TMIN
0
20
40
60
80
100
120
0
P
W
M
D
UT
Y
CY
CL
E
(
%
)
10
20
30
40
50
60
70
80
90
100
TEMPERATURE ABOVE TMIN
(A)
(B)
0
20406080
100
120
0
F
A
N
SP
EED
(
%
O
F
MA
X
)
10
20
30
40
50
60
70
80
90
100
05
38
2-
0
63
2°C
80°C
53.3°C
40°C
32°C
26.6°C
20°C
16°C
13.3°C
10°C
8°C
6.67°C
5°C
4°C
3.33°C
2.5°C
2°C
80°C
53.3°C
40°C
32°C
26.6°C
20°C
16°C
13.3°C
10°C
8°C
6.67°C
5°C
4°C
3.33°C
2.5°C
Figure 62. TRANGE and % Fan Speed Slopes with PWMMIN = 20%
Example: Determining TRANGE for Each Temperature
Channel
The following example shows how the different TMIN and TRANGE
settings can be applied to three different thermal zones. In this
example, the following TRANGE values apply:
TRANGE = 80°C for ambient temperature
TRANGE = 53.33°C for CPU temperature
TRANGE = 40°C for VRM temperature
This example uses the MUX configuration described in Step 2:
Configuring the Mux, with the ADT7476 connected as shown
in Figure 52. Both CPU temperature and VRM temperature
drive the CPU fan connected to PWM1. Ambient temperature
drives the front chassis fan and rear chassis fan connected to
PWM2 and PWM3. The front chassis fan is configured to run
at PWMMIN = 20%. The rear chassis fan is configured to run at
PWMMIN = 30%. The CPU fan is configured to run at
PWMMIN = 10%.
Note that the control range for 4-wire fans is much wider than
for 3-wire fans. In many cases, 4-wire fans can start with a PWM
drive of as little as 20% or less. In extreme cases, some 3-wire
fans cannot run unless a PWM drive of 60% or more is applied.
TEMPERATURE ABOVE TMIN
0
1020
3040
100
50
60
70
80
90
0
P
W
M
DUTY
CY
CLE
(%)
10
20
30
40
50
60
70
80
90
100
TEMPERATURE ABOVE TMIN
0
FA
N
SPEED
(
%
M
A
X
R
P
M
)
10
20
30
40
50
60
70
80
90
100
0
1020
3040
100
50
60
70
80
90
05382-064
VRM TEMPERATURE
AMBIENT TEMPERATURE
CPU TEMPERATURE
VRM TEMPERATURE
CPU TEMPERATURE
AMBIENT TEMPERATURE
Figure 63. TRANGE and % Fan Speed Slopes for VRM, Ambient, and
CPU Temperature Channels
STEP 7: T
THERM FOR TEMPERATURE CHANNELS
TTHERM is the absolute maximum temperature allowed on a
temperature channel. Above this temperature, a component
such as the CPU or VRM may be operating beyond its safe
operating limit. When the temperature measured exceeds
TTHERM, all fans are driven at 100% PWM duty cycle (full speed)
to provide critical system cooling.
The fans remain running at 100% until the temperature drops
below TTHERM minus hysteresis, where hysteresis is the number
programmed into the hysteresis registers (0x6D and 0x6E). The
default hysteresis value is 4°C.
相關(guān)PDF資料
PDF描述
ADT7482ARMZ-RL DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT
ADT7482ARMZ-U2 DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT
ADT7485ARMZ-REEL DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT
ADT7485ARMZ DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT
ADT7485ARMZ-REEL7 DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADT7476EBZEVB 功能描述:BOARD EVALUATION FOR ADT7476 RoHS:是 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 過(guò)時(shí)/停產(chǎn)零件編號(hào) 系列:dBCool® 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
ADT7481 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Channel Temperature Sensor and Over Temperature Alarm
ADT7481ARMZ 功能描述:板上安裝溫度傳感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
ADT7481ARMZ-001 功能描述:板上安裝溫度傳感器 2 CH TEMP SNSR/ALARM 2 WIRE SMBUS INTRFCE RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
ADT7481ARMZ-1 功能描述:IC SENSOR TEMP 2CH ALARM 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)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(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫(kù) 輸出類型:2 線 SMBus? 輸出警報(bào):無(wú) 輸出風(fēng)扇:無(wú) 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(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*