參數(shù)資料
型號(hào)： ADM1030
廠商： Analog Devices, Inc.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:66; Series:LJT06R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:19; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:19-35
中文描述： 智能溫度監(jiān)視器和PWM風(fēng)扇控制器
文件頁(yè)數(shù)： 12/28頁(yè)
文件大?。?/td> 278K
代理商： ADM1030
REV. 0
ADM1030
–12–
AUTOMATIC FAN SPEED CONTROL
The ADM1030 has a local temperature channel and a remote
temperature channel, which may be connected to an on-chip
diode-connected transistor on a CPU. These two temperature
channels may be used as the basis for an automatic fan speed
control loop to drive a fan using Pulsewidth Modulation (PWM).
HOW DOES THE CONTROL LOOP WORK
The Automatic Fan Speed Control Loop is shown in Fig-
ure 6 below.
FAN
SPEED
MAX
MIN
TEMPERATURE
T
MIN
T
MAX
= T
MIN
+ T
RANGE
SPIN UP FOR 2 SECONDS
Figure 6. Automatic Fan Speed Control
In order for the fan speed control loop to work, certain loop
parameters need to be programmed into the device.
1.
T
MIN
. The temperature at which the fan should switch on
and run at minimum speed. The fan will only turn on once
the temperature being measured rises above the T
MIN
value
programmed. The fan will spin up for a predetermined time
(default = 2 secs). See Fan Spin-Up section for more details.
2.
T
RANGE
. The temperature range over which the ADM1030
will automatically adjust the fan speed. As the temperature
increases beyond T
MIN
, the PWM_OUT duty cycle will be
increased accordingly. The T
RANGE
parameter actually defines
the fan speed versus temperature slope of the control loop.
3.
T
MAX
.
The temperature at which the fan will be at its maxi-
mum speed. At this temperature, the PWM duty cycle
driving the fan will be 100%. T
MAX
is given by T
MIN
+
T
RANGE
. Since this parameter is the sum of the T
MIN
and
T
RANGE
parameters, it does not need to be programmed into
a register on-chip.
4. A hysteresis value of 5
°
C is included in the control loop to
prevent the fan continuously switching on and off if the tem-
perature is close to T
MIN
. The fan will continue to run until
such time as the temperature drops 5
°
C below T
MIN
.
Figure 7 shows the different control slopes determined by the
T
RANGE
value chosen, and programmed into the ADM1030.
T
MIN
was set to 0
°
C to start all slopes from the same point. It
can be seen how changing the T
RANGE
value affects the PWM
duty cycle versus temperature slope.
TEMPERATURE
–
C
P
–
0
100
93
87
80
73
66
60
53
47
40
33
T
MIN
T
MAX
= T
MIN
+ T
RANGE
5
10
20
40
60
80
T
RANGE
=80 C
T
RANGE
0C
T
RNE
2C
T
RG
0
T
R
Figure 7. PWM Duty Cycle vs. Temperature Slopes (T
RANGE
)
Figure 8 shows how, for a given T
RANGE
, changing the T
MIN
value affects the loop. Increasing the T
MIN
value will increase
the T
MAX
(temperature at which the fan runs full speed) value,
since T
MAX
= T
MIN
+ T
RANGE
. Note, however, that the PWM
Duty Cycle vs Temperature slope remains exactly the same.
Changing the T
MIN
value merely shifts the control slope. The
T
MIN
may be changed in increments of 4
°
C.
TEMPERATURE
–
C
P
–
0
100
93
87
80
73
66
60
53
47
40
33
T
MIN
T
MAX
= T
MIN
+ T
RANGE
20
40
60
80
T
RANG
0C
T
RANGE
0C
T
RANG
0C
Figure 8. Effect of Increasing T
MIN
Value on Control Loop
FAN SPIN-UP
As was previously mentioned, once the temperature being mea-
sured exceeds the T
MIN
value programmed, the fan will turn on
at minimum speed (default = 33% duty cycle). However, the
problem with fans being driven by PWM is that 33% duty cycle
is not enough to reliably start the fan spinning. The solution is
to spin the fan up for a predetermined time, and once the fan
has spun up, its running speed may be reduced in line with the
temperature being measured.
The ADM1030 allows fan spin-up times between 200 ms and
8 seconds. Bits <2:0> of Fan Characteristics Register 1 (Register
0x20) program the fan spin-up time.
相關(guān)PDF資料
PDF描述
ADM1033 Thermal Monitor and Fan Speed (RPM) Controller
ADM1033ARQ Thermal Monitor and Fan Speed (RPM) Controller
ADM1033ARQ-REEL Thermal Monitor and Fan Speed (RPM) Controller
ADM1033ARQ-REEL7 Thermal Monitor and Fan Speed (RPM) Controller
ADM1033ARQZ Thermal Monitor and Fan Speed (RPM) Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADM1030ARQ 功能描述:IC SNSR TEMP/FAN PWM CTRL 16QSOP RoHS:否 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
ADM1030ARQ-REEL 功能描述:IC SNSR TEMP/FAN PWM CTRL 16QSOP RoHS:否 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
ADM1030ARQ-REEL7 功能描述:IC SNSR TEMP/FAN PWM CTRL 16QSOP RoHS:否 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
ADM1030ARQZ 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 TDM & PWM FAN CNTRLRS IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
ADM1030ARQZ-REEL 功能描述:板上安裝溫度傳感器 TDM PWM FAN CTRLRS IC 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
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

*
*
*