參數(shù)資料
型號： ADT7462ACPZ-500RL7
廠商： ON SEMICONDUCTOR
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 4Cel, SQUARE, SURFACE MOUNT
封裝： 5 X 5 MM, LFCSP-32
文件頁數(shù)： 26/88頁
文件大?。?/td> 836K
代理商： ADT7462ACPZ-500RL7
ADT7462
Rev. 2 | Page 32 of 88 | www.onsemi.com
Driving Two Fans from Each PWM
Note that the ADT7462 has up to eight TACH inputs available
for fan speed measurement, but only four PWM drive outputs.
If all eight fans are being used in the system, two fans should be
driven in parallel from each PWM output. Figure 43 shows how
to drive two fans in parallel using the NDT3055L MOSFET.
This information is relevant for low frequency mode only
(2-wire and 3-wire fans), because the PWM and TACHs need to
be synchronized to obtain accurate fan speed measurements
using pulse stretching (see the Fan Speed Measurement with
Pulse Stretching section). In high frequency mode and when
using 4-wire fans, the TACH signal is always valid because the
fan is always powered on.
Note that because the MOSFET can handle up to 3.5 A, it is
simply a matter of connecting another fan directly in parallel
with the first. Care should be taken in designing drive circuits
with transistors and FETs to ensure that the PWM pins are not
required to source current and that they sink less than the 8 mA
maximum current specified on the MOSFET data sheet.
ADT7462
PWM3
TACH3
TACH7
3.3V
+V
TACH
Q1
NDT3055L
1N4148
5V OR
12V FAN
5V OR
12V FAN
10k
TYPICAL
10k
TYPICAL
10k
TYPICAL
05569
-0
33
Figure 43. Interfacing Two Fans in Parallel to a PWM Output
Using a Single N-Channel MOSFET
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADT7462ACPZ-5RL7 功能描述:監(jiān)控電路 FLX H/WRE MON IC SRV RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
ADT7462ACPZ-R7 功能描述:監(jiān)控電路 FLX H/WRE MON IC SRV RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
ADT7462ACPZ-REEL 功能描述:監(jiān)控電路 FLX H/WRE MON IC SRV RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
ADT7462ACPZ-REEL7 功能描述:IC TEMP/VOLT MONITOR 32-LFCSP 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 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
ADT7462EBZEVB 功能描述:EVALUATION BOARD ADT7462 制造商:on semiconductor 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1
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