- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄39 > ADM1034ARQZ-REEL (ON Semiconductor)IC THERM/FAN SPEED CTRLR 16-QSOP Datasheet資料下載
參數(shù)資料
| 型號： | ADM1034ARQZ-REEL |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 22/38頁 |
| 文件大?。?/td> | 427K |
| 描述： | IC THERM/FAN SPEED CTRLR 16-QSOP |
| 產(chǎn)品變化通告： | MFG CHG Notification ADI to ON Semi |
| 標準包裝： | 2,500 |
| 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，外部傳感器 |
| 精確度： | ±1°C |
| 拓撲： | ADC，比較器，多路復(fù)用器，寄存器庫 |
| 輸出類型： | SMBus? |
| 輸出警報： | 是 |
| 輸出風(fēng)扇： | 是 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-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頁第18頁第19頁第20頁第21頁當前第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
ADM1034
http://onsemi.com
22
measurements are the main benefits. The fan is allowed to
run reliably at speeds as low as 30 percent of the full
capability.
The drive signal applied to the fan is synchronized with
the TACH signal. The ADM1034 switches on the drive
signal and waits for a transition on the TACH signal. When
a transition takes place on the TACH signal, the PWM drive
is switched off for a period of time called t
off
. The drive
signal is then switched on again. The toff time is varied in
order to vary the fan speed. If the fan is running too fast, the
toff time is increased. If the fan is running too slow, the toff
time is decreased.
Since the drive signal is synchronized with the TACH
signal, the frequency with which the fan is driven depends
on the current speed of the fan and the number of poles in it.
Figure 34 shows how the synchronous speed drive signal
works. The ideal TACH signal is the TACH signal that
would be output from the fan if power were applied
100 percent of the time. It is representative of the actual
speed of the fan. The actual TACH signal is the signal the
user would see on the TACH output from the fan if the user
were to put a scope on it. In effect, the actual TACH signal
is the ideal TACH signal chopped with the drive signal.
Figure 34. Drive Signal by Using Synchronous Control
ACTUAL TACH
DRIVE
IDEAL TACH
POLE TRANSITION POINTS
t
POLE
t
OFF
DASH = TACH FLOATS HIGH BY PULL-UP RESISTOR
SOLID = TRUE TACH WHEN FAN IS POWERED
Fan Inputs
Pin 2 and Pin 4 are TACH inputs intended for fan speed
measurement. These inputs are open-drain.
Signal conditioning on the ADM1034 accommodates the
slow rise and fall time of typical tachometer outputs. The
maximum input signal range is from 0V to 5.0 V, even when
V
CC
is less than 5.0 V. In the event that these inputs are
supplied from fan outputs exceeding 0 V to 5.0 V, either
resistive attenuation of the fan signal or diode clamping
must be used to keep the fan inputs within an acceptable
range.
Figure 35 to Figure 38 show examples of possible fan
input circuits. If the fan TACH has a resistive pullup to V
CC
,
it can be connected directly to the fan output.
Figure 35. Fan with TACH Pullup to +V
CC
5 V or 12 V
FAN
V
CC
FAN SPEED
COUNTER
TACH
OUTPUT
TACH X
PULLUP
4.7 kW
TYP
ADM1034
DRIVE X
V
CC
100 kW
TYP
If the fan output has a resistive pullup to 12 V (or another
voltage greater than 5.0 V), the fan output can be clamped
with a Zener diode, as shown in Figure 36. The Zener
voltage should be chosen so that it is greater than V
IH
but less
than 5.0 V. Allowing for the voltage tolerance of the Zener,
a value of between 3.0 V and 5.0 V is suitable.
Figure 36. Fan with TACH Pullup to Voltage > 5.0 V,
Clamped with Zener Diode
5 V or 12 V
FAN
V
CC
FAN SPEED
COUNTER
TACH
OUTPUT
TACH X
PULLUP
4.7 kW
TYP
ADM1034
DRIVE X
V
CC
100 kW
TYP
ZD1*
*CHOOSE ZD1 VOLTAGE APPROXIMATELY 0.8 ?V
CC
If the fan has a strong pullup (less than 1 kW to +12 V) or
a totem-pole output, a series resistor can be added to limit the
Zener current, as shown in Figure 37. Alternatively, a
resistive attenuator may be used, as shown in Figure 38.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADN8810ACPZ-REEL7 | IC CURRENT SOURCE(12BIT) 24LFCSP |
| ADP2140ACPZ3328R7 | IC REG DL BCK/LINEAR 10LFCSP |
| ADP5022ACBZ-6-R7 | IC REG TRPL BCK/LINEAR 16WLCSP |
| ADP5041ACPZ-1-R7 | IC REG TRPL BCK/LINEAR 20-LFCSP |
| ADP5042ACPZ-2-R7 | IC REG TRPL BCK/LINEAR 20LFCSP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADM1034ARQZ-REEL7 | 功能描述:IC THERM/FAN SPEED CTRLR 16-QSOP RoHS:是 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(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(fēng)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(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADM1040 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Power Supply Monitor ASIC |
| ADM1041 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Secondary-Side Controller with Current Share and Housekeeping |
| ADM1041A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Secondary-Side Controller with Current Share and Housekeeping |
| ADM1041AARQZ | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。