參數(shù)資料
型號： ADT7470ARQZ
廠商： ANALOG DEVICES INC
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 7BIT(s), RECTANGULAR, SURFACE MOUNT
封裝： ROHS COMPLIANT, MO-137AB, QSOP-16
文件頁數(shù)： 18/40頁
文件大小： 962K
代理商： ADT7470ARQZ
ADT7470
Rev. C | Page 25 of
40
MANUAL FAN SPEED CONTROL
Manual fan speed control on the ADT7470 allows the user to
control the PWM duty cycle for each fan via the registers. The
ADt7470 powers-up in manual fan control mode, with all
PWM duty cycles set to maximum. The PWM Configuration
registers determine whether the fans are in manual or automatic
fan control mode.
SETTING THE PWM DUTY CYCLE
The ADT7470 allows the duty cycle of any PWM output to be
manually adjusted. This can be useful if users want to change
fan speed in software or want to adjust PWM duty cycle output
for test purposes. The PWM current duty cycle registers
(Register 0x32 to Register 0x35) can be written with 8-bit
values in manual fan speed control mode to manually adjust
the speeds of the cooling fans.
The PWM duty cycle for each output can be set anywhere from
0% to 100%, in steps of 0.39%.
The value to be programmed into the PWM Current Duty
Cycle registers can be calculated as follows:
Value (decimal) = Desired PWM duty cycle/0.39
Example 1: For a PWM Duty Cycle of 50%
Value (decimal) = 50/0.39 = 128 decimal
Value = 128 decimal or 80 hex
Example 2: For a PWM Duty Cycle of 33%
Value (decimal) = 33/0.39 = 85 decimal
Value = 85 decimal or 54 hex
Table 21. PWM Current Duty Cycle Registers
Register Address
Description
Default
0x32
PWM1 duty cycle
0xFF (100%)
0x33
PWM2 duty cycle
0xFF (100%)
0x34
PWM3 duty cycle
0xFF (100%)
0x35
PWM4 duty cycle
0xFF (100%)
Table 22.Fan Control Mode Configuration
Register/Bit
Mnenonic
Description
0x68 Bit[6]
BHVR2
This bit determines fan behavior for PWM2 output.
0 = Manual mode (PWM2 duty cycle controlled in software).
1 = Fastest speed calculated by all temperatures control PWM2 (automatic fan control mode).
0x68 Bit[7]
BHVR1
This bit determines fan behavior for PWM1 output.
0 = Manual mode (PWM1 duty cycle controlled in software).
1 = Fastest speed calculated by all temperatures control PWM1 (automatic fan control mode).
0x69 Bit[6]
BHVR4
This bit determines fan behavior for PWM4 output.
0 = Manual mode (PWM4 duty cycle controlled in software).
1 = Fastest speed calculated by all temperatures control PWM4 (automatic fan control mode).
0x69 Bit[7]
BHVR3
This bit determines fan behavior for PWM3 output.
0 = Manual mode (PWM3 duty cycle controlled in software).
1 = Fastest speed calculated by all temperatures control PWM3 (automatic fan control mode).
相關(guān)PDF資料
PDF描述
ADT7473ARQZ-1REEL7 DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
ADT7473ARQZ-1REEL DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
ADT7476ARQZ-REEL7 DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
ADT7482ARMZ-RL DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT
ADT7482ARMZ-U2 DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADT7470ARQZ-REEL 功能描述:IC SENSOR TEMP FAN CTRLR 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 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:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7470ARQZ-REEL7 功能描述:IC SENSOR TEMP FAN CTRLR 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 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:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7473 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:dbCOOL Remote Thermal Monitor and Fan Control
ADT7473_11 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:dbCOOL Remote Thermal Monitor and Fan Control
ADT7473ARQZ 功能描述:板上安裝溫度傳感器 THERMAL MONITOR FAN CONTROLLER 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，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

*
*
*