- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄39 > ADM1029ARQZ-R7 (ON Semiconductor)IC SENSOR 2TEMP/FAN CTRL 24QSOP Datasheet資料下載
參數(shù)資料
| 型號： | ADM1029ARQZ-R7 |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 18/50頁 |
| 文件大?。?/td> | 402K |
| 描述： | IC SENSOR 2TEMP/FAN CTRL 24QSOP |
| 產(chǎn)品變化通告： | QSOP 24ld Pkg (MSL) Change 17/Jun/2010 |
| 標準包裝： | 1,000 |
| 功能： | 風扇控制，溫度監(jiān)控器 |
| 傳感器類型： | 內(nèi)部和外部 |
| 感應溫度： | 0°C ~ 100°C，外部傳感器 |
| 精確度： | ±1°C 本地，±3°C 遠程 |
| 拓撲： | ADC，風扇控制，寄存器庫 |
| 輸出類型： | 開路漏極 |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 100°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) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁
ADM1029
http://onsemi.com
18
It is recommended that the minimum PWM duty cycle be
set to 33% (0x05). This has been determined to be the lowest
PWM duty cycle that most fans will run reliably at. Note that
the PWM duty cycle values programmed in to these registers
also define the PWM duty cycle that the fans will turn on at,
in Automatic Fan Speed Control Mode. It is recommended
that after power-up, the PWM duty cycle is set to 33% before
enabling Automatic Fan Speed Control.
Thermal Trip Mode
The ADM1029 can thermally trip the fan(s) for simple
on/off fan control, or 2-speed fan control. For example, a fan
can be programmed to run at 33% duty cycle. If the
temperature exceeds the high temperature limit set for that
temperature channel, the fan can automatically trip and run
at Alarm Speed. The fan will continue to run at Alarm Speed
even if the temperature error condition subsides, until the
Latch Temp Fault bit (Bit 7 of the Temp x Fault Action Reg)
is cleared in software by writing a 0 to it. To configure Fan 1
normally, run at 33% but to thermally trip to Alarm Speed
for a Remote 2 measured temperature of 70癈, set up the
following registers:
1. Configure the normal PWM duty cycle for Fan 1
to 33%.
Fan 1 MinimumAlarm Speed Reg (0x60) + 0xF5
2. Set the Remote 2 High Temperature Limit = 70癈.
Remote 2 Temp High Limit Reg (0x92) + 0x46
3. Configure Alarm Speed on Overtemperature
function for Remote 2 Temperature channel.
Set Bit 1 of Temp 2 Fault Action Reg (0x42)
4. Enable Fan 1 to be controlled by Remote 2
Temperature.
Set Bit 0 of Temp 2 Cooling Action Reg (0x4A)
Once the fan thermally trips to Alarm Speed, it will
continue to run at Alarm Speed until the temperature drops
below the High Temperature Limit and the Latch Temp Fault
bit (Bit 7 of the Temp 2 Fault Action Reg) is cleared to 0.
Event Latch Bits
Certain events that occur will cause latch bits to be set in
various registers on the ADM1029. Once a latch bit is set, it
will need to be cleared by software for the system to return
to normal operation. To detect if a latch bit has been set, the
INT
pin can be used to signal a latch event to the system
supervisor. Alternatively, the Status Registers can be polled
periodically, and any latch bits that are set can be cleared.
The events that cause latch bits to be set are:
1. Thermal Events. If the fan is run at Alarm Speed
on Overtemperature or Undertemperature, this will
set the Latch Temp Fault bit (Bit 7 of the
Temp x Fault Action Registers 0x400x42).
2. Missing Fan. If a fan is missing, i.e., has been
unplugged, the Missing Latch bit (Bit 1 of
Fan x Status Registers) is set.
3. Hotplugged Fan. If a new fan is inserted into the
system, Bit 7 (Hotplug Latch bit) of the
Fan x Status Register is set.
4. FAULT Asserted. If the fan becomes stuck and its
FAULT output asserts low, Bit 2 (Fault Latch bit)
of the Fan x Status register is set.
5. TACH Failure. If the fan runs underspeed or
becomes stuck, then Bit 6 (Tach Fault Latch Bit)
of the Fan x Status Register is set.
Automatic Fan Speed Control
The ADM1029 has a local temperature channel and two
remote temperature channels, which may be connected to an
on-chip diode-connected transistor on a CPU or a
general-purpose discrete transistor. These three temperature
channels may be used as the basis for an automatic fan speed
control loop to drive fans using Pulsewidth Modulation
(PWM).
How Does The Control Loop Work?
The Automatic Fan Speed Control Loop is shown in
Figure 29.
Figure 29. Automatic Fan Speed Control
TEMPERATURE
T
MIN
MIN
MAX
T
MAX
= T
MIN
+ T
RANGE
SPIN UP FOR 2 SECONDS
In order for the fan speed control loop to work, certain
loop parameters need to be programmed in to the device:
1. T
MIN
. This is the temperature at which a 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
. This will be the temperature range over
which the ADM1029 will automatically adjust fan
speed. As the temperature increases beyond T
MIN
,
the PWM duty cycle will be increased accordingly.
相關PDF資料 |
PDF描述 |
|---|---|
| ADM1030ARQZ-RL7 | IC SNSR TEMP/FAN PWM CTRL 16QSOP |
| ADM1032ARZ-REEL | IC TEMP MONITOR 85DEG 8SOIC |
| ADM1033ARQZ-RL7 | IC THERM/FAN SPEED CTLR 16-QSOP |
| ADM1034ARQZ-REEL | IC THERM/FAN SPEED CTRLR 16-QSOP |
| ADN8810ACPZ-REEL7 | IC CURRENT SOURCE(12BIT) 24LFCSP |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADM1030 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Intelligent Temperature Monitor and PWM Fan Controller |
| 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:- 標準包裝: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 |
| 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:- 標準包裝: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 |
| 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:- 標準包裝: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 |
| ADM1030ARQZ | 功能描述:馬達/運動/點火控制器和驅(qū)動器 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。