參數(shù)資料
型號： NCT7491RQR2G
廠商： ON Semiconductor
文件頁數(shù)： 57/80頁
文件大?。?/td> 844K
描述： IC REMOTE THERMAL MONITOR 24QSOP
標(biāo)準(zhǔn)包裝： 2,500
系列： *
NCT7491
http://onsemi.com
57
Table 73. REGISTER 0x62  Enhanced Acoustics Register 1 (PowerOn Default = 0x20)
Bit
Name
R/W
Description
<2:0>
ACOU
R/W
These bits define the maximum rate of change of the PWM1 output. Instead of the fan speed jumping
instantaneously to its newly determined speed, it ramps gracefully at the rate determined by these bits.
This feature ultimately enhances the acoustics of the fan.
Time Slot Increase
Time for 0% to 100%
000 = 1
37.5 sec
001 = 2
18.8 sec
010 = 3
12.5 sec
011 = 4
7.5 sec
100 = 8
4.7 sec
101 = 12
3.1 sec
110 = 24
1.6 sec
111 = 48
0.8 sec
<3>
EN1
R/W
When this bit is 1, smoothing is enabled on PWM1 output.
<4>
SYNC
R/W
SYNC = 1 synchronizes fan speed measurements on TACH2, TACH3, and TACH4 to PWM3. This
allows up to three fans to be driven from PWM3 output and their speeds to be measured.
SYNC = 0 synchronizes only TACH3 and TACH4 to PWM3 output.
<5>
MIN1
R/W
When the NCT7491 is in automatic fan control mode, this bit defines whether PWM1 is off (0% duty
cycle) or at PWM1 minimum duty cycle when the controlling temperature is below its T
MIN
  hysteresis
value.
0 = 0% duty cycle below T
MIN
  hysteresis.
1 = PWM1 minimum duty cycle below T
MIN
  hysteresis.
<6>
MIN2
R/W
When the NCT7491 is in automatic fan speed control mode, this bit defines whether PWM2 is off (0%
duty cycle) or at PWM2 minimum duty cycle when the controlling temperature is below its T
MIN
  hys-
teresis value.
0 = 0% duty cycle below T
MIN
  hysteresis.
1 = PWM 2 minimum duty cycle below T
MIN
  hysteresis.
<7>
MIN3
R/W
When the NCT7491 is in automatic fan speed control mode, this bit defines whether PWM3 is off (0%
duty cycle) or at PWM3 minimum duty cycle when the controlling temperature is below its T
MIN
  hys-
teresis value.
0 = 0% duty cycle below T
MIN
  hysteresis.
1 = PWM3 minimum duty cycle below T
MIN
  hysteresis.
Table 74. REGISTER 0x63  Enhanced Acoustics Register 2 (PowerOn Default = 0x00)
Bit
Name
R/W (Note 25)
Description
<2:0>
ACOU3
R/W
These bits define the maximum rate of change of the PWM3 output. Instead of the fan speed
jumping instantaneously to its newly determined speed, it ramps gracefully at the rate determ-
ined by these bits. This feature ultimately enhances the acoustics of the fan.
Time Slot Increase
Time for 0% to 100%
000 = 1
37.5 sec
001 = 2
18.8 sec
010 = 3
12.5 sec
011 = 4
7.5 sec
100 = 8
4.7 sec
101 = 12
3.1 sec
110 = 24
1.6 sec
111 = 48
0.8 sec
< 3 >
EN3
R/W
When this bit is 1, smoothing is enabled on the PWM3 output.
25.These registers become readonly when the NCT7491 is in automatic fan control mode.
相關(guān)PDF資料
PDF描述
NCT75MNR2G IC SENSOR TEMP DGTL 8DFN
NCV8881PWR2G IC REG TRPL BUCK/LINEAR 16SOIC
NE1617ADS,112 IC TEMP MONITOR 16SSOP
NE1619DS,118 IC TEMP MONITOR 16SSOP
NIS5112D1R2G IC ELECTRONIC FUSE HOTSWAP 8SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCT75DMR2G 功能描述:板上安裝溫度傳感器 2-Channel Digital Thermometer w/ Alarm 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
NCT75DR2G 功能描述:板上安裝溫度傳感器 2-Channel Digital Thermometer w/ Alarm 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
NCT75MNR2G 功能描述:板上安裝溫度傳感器 HAS2MONOJLCC84SPACE 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
NCT7717U TR 制造商:Nuvoton Technology Corp 功能描述:SMBUS INTERFACE TEMP. SENSOR W 制造商:Nuvoton Technology Corp 功能描述:IC SMBUS TEMP SENSOR 8MSOP
NCT7718W TR 制造商:Nuvoton Technology Corp 功能描述:IC SMBUS TEMP SENSOR 8MSOP
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

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

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

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*