- 您现在的位置：买卖IC网 > Sheet目录1194 > ADT7490ZEVB (ON Semiconductor)BOARD EVALUATION FOR ADT7490
ADT7490
100%
PWM MIN
T RANGE
100%
10%
0%
T MIN
0%
TEMPERATURE
Figure 53. T RANGE Parameter Affects Cooling Slope
T MIN ? HYST
T MIN
30 ? C
40 ? C
45 ? C
54 ? C
The T RANGE is determined by the following procedure:
1. Determine the maximum operating temperature for
that channel (for example, 70 ? C).
2. Determine experimentally the fan speed (PWM
duty cycle value) that does not exceed the
temperature at the worst-case operating points. For
example, 70 ? C is reached when the fans are
running at 50% PWM duty cycle.
3. Determine the slope of the required control loop to
meet these requirements.
4. Using the ADT7490 evaluation software,
graphically program and visualize this
functionality. Ask a local Analog Devices
representative for details.
As PWM MIN is changed, the automatic fan control slope
changes.
100%
50%
33%
Figure 55. Increasing T RANGE Changes the AFC Slope
100%
MAX
PWM
10%
0%
T RANGE
T MIN ? HYST
Figure 56. Changing PWM MAX Does Not Change the
AFC Slope
Selecting T RANGE
The T RANGE value can be selected for each temperature
channel: Remote 1, local, Remote 2, and PECI temperature.
Bits [7:4] (T RANGE ) of Register 0x5F to Register 0x61 and
Register 0x3C define the T RANGE value for each
temperature channel.
Table 42. SELECTING A T RANGE VALUE
Bits [7:4] (Note 1) T RANGE ( 5 C)
0000 2
0%
0001
2.5
T MIN
30 ? C
0010
0011
3.33
4
Figure 54. Adjusting PWM MIN Changes the Automatic
Fan Control Slope
As T RANGE is changed, the slope changes. As T RANGE
gets smaller, the fans reach 100% speed with a smaller
temperature change.
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
5
6.67
8
10
13.33
16
20
26.67
32 (default)
40
53.33
80
1. Register 0x5F configures Remote 1 T RANGE ; Register 0x60
configures local T RANGE ; Register 0x61 configures Remote 2
T RANGE , Register 0x3C configures PECI T RANGE .
http://onsemi.com
38
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ADZS-21262-1-EZEXT
BOARD DAUGHTER FOR ADSP-21262
ADZS-BF-EZEXT-1
BOARD DAUGHTER ADSP-BF533/561KIT
ADZS-BFAV-EZEXT
BOARD DAUGHT ADSP-BF533,37,61KIT
ADZS-BFSHUSB-EZEXT
BOARD DAUGHTER EZ EXTENDER
ADZS-BRKOUT-EX3
ADZS-BRKOUT-EX3
ADZS-SHAUDIO-EZEXT
SHARC AUDIO EZ-EXTENDER
ADZS-WVGALCD-EX3
BOARD EXTENDER WVGA/LCD EI3
AGA-3
FUSE 3A 125VAC 1AG FAST
相关代理商/技术参数
ADT75
制造商:AD 制造商全称:Analog Devices 功能描述:+-1∑C Accurate, 12-Bit Digital Temperature Sensor
ADT7516
制造商:AD 制造商全称:Analog Devices 功能描述:SPI/I2C Compatible, Temperature Sensor, Four Channel ADC and Quad Voltage Output DAC
ADT7516_06
制造商:AD 制造商全称:Analog Devices 功能描述:SPI-/I2C-Compatible, Temperature Sensor,4-Channel ADC and Quad Voltage Output
ADT7516ARQ
功能描述:IC TEMP SNSR QUAD DAC 16-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:2,500 系列:SilentSense™ 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-55°C ~ 125°C，外部传感器 精确度:±2°C 本地（最大），±3°C 远程（最大） 拓扑:ADC（三角积分型），比较器，寄存器库 输出类型:I²C?/SMBus? 输出警报:是 输出风扇:是 电源电压:2.7 V ~ 5.5 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MSOP 包装:带卷 (TR) 其它名称:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7516ARQ-REEL
制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (4-Wire, SPI, I2C) 16-Pin QSOP T/R 制造商:Analog Devices 功能描述:TEMP SENSOR DGTL SERL (4-WIRE, SPI) 16QSOP - Tape and Reel
ADT7516ARQ-REEL7
制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (4-Wire, SPI, I2C) 16-Pin QSOP T/R 制造商:Analog Devices 功能描述:TEMP SENSOR DGTL SERL (4-WIRE, SPI) 16QSOP - Tape and Reel
ADT7516ARQZ
功能描述:IC TEMP SNSR QUAD DAC 16-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:3,000 系列:- 功能:温度开关 传感器类型:内部 感应温度:85°C 分界点 精确度:±6°C（最小值） 拓扑:ADC（三角积分型），比较器，寄存器库 输出类型:开路漏极 输出警报:是 输出风扇:是 电源电压:2.7 V ~ 5.5 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:带卷 (TR) 其它名称:ADT6501SRJZP085RL7-ND
ADT7516ARQZ-REEL
制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (4-Wire, SPI, I2C) 16-Pin QSOP T/R