- 您现在的位置：买卖IC网 > PDF目录22027 > ADM1031ARQZ (ON Semiconductor)IC SENSOR 2-TEMP/FAN CTRL 16QSOP PDF资料下载
参数资料
| 型号： | ADM1031ARQZ |
| 厂商： | ON Semiconductor |
| 文件页数： | 15/32页 |
| 文件大小： | 0K |
| 描述： | IC SENSOR 2-TEMP/FAN CTRL 16QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Discontinuation 30/Sept/2011 |
| 标准包装： | 98 |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | 0°C ~ 100°C，外部传感器 |
| 精确度： | ±1°C 本地，±0.5°C 远程 |
| 拓扑： | ADC，比较器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页当前第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
ADM1031
100
93
87
80
The fan actually reaches full speed at a much lower
temperature, 28 ? C. Case 3 shows that when the minimum
PWM duty cycle is increased to 73%, the temperature at
which the fan runs full speed is 16 ? C. Therefore, the effect
of increasing the minimum PWM duty cycle, with a fixed
73
66
60
53
47
40
33
0
T MIN
T RANGE = 80 ? C
20 40 70 80
T MAX = T MIN + T RANGE
REMOTE TEMPERATURE ( ? C)
T MIN and fixed T RANGE , is that the fan actually reaches full
speed (T MAX ) at a lower temperature than T MIN + T RANGE .
How can T MAX be calculated?
In automatic fan speed control mode, the register that
holds the minimum PWM duty cycle at T MIN , is the fan
speed configuration register (Register 0 ? 22). Table 11
shows the relationship between the decimal values written
to the fan speed configuration register and PWM duty cycle
obtained.
Figure 25. Max Speed Calculated by Remote
Temperature Control Loop Drives Fan
Table 11. Programming PWM Duty Cycle
Decimal Value PWM Duty Cycle
Programming the Automatic Fan Speed Control
Loop
1. Program a value for T MIN.
2. Program a value for the slope T RANGE.
3. T MAX = T MIN + T RANGE.
4. Program a value for fan spin-up time.
5. Program the desired automatic fan speed control
mode behavior, that is, which temperature channel
controls the fan.
6. Select automatic fan speed control mode by setting
Bit 7 of Configuration Register 1.
00
01
02
03
04
05
06
07
08
09
0%
7%
14%
20%
27%
33% (Default)
40%
47%
53%
60%
Other Control Loop Parameters
It should be noted that changing the minimum PWM duty
cycle affects the control loop behavior.
Slope 1 of Figure 26 shows T MIN set to 0 ? C and the
T RANGE chosen is 40 ? C. In this case, the fan’s PWM duty
cycle varies over the range 33% to 100%. The fan runs
full-speed at 40 ? C. If the minimum PWM duty cycle at
which the fan runs at T MIN is changed, its effect can be seen
on Slope 2 and Slope 3. Take Case 2, where the minimum
PWM duty cycle is reprogrammed from 33% (default) to
10 (0 ? 0A) 67%
11 (0 ? 0B) 73%
12 (0 ? 0C) 80%
13 (0 ? 0D) 87%
14 (0 ? 0E) 93%
15 (0 ? 0F) 100%
The temperature at which the fan runs full-speed (100%
duty cycle) is given by:
53%.
T MAX + T MIN ) ((Max DC * Min DC)
T RANGE 10) (eq. 2)
100
93
87
80
73
66
3
2
where:
T MAX
T MIN
Max DC
Min DC
= Temperature at which fan runs full-speed
= Temperature at which fan will turn on
= Maximum Duty Cycle (100%) = 15 decimal
= Duty Cycle at T MIN , programmed into
Fan Speed Config Register
(default = 33% = 5 decimal)
60
53
47
40
33
1
T RANGE = 40 ? C
T RANGE = PWM Duty Cycle vs. Temperature Slope
Example 1 :
T MIN = 0 ? C, T RANGE = 40 ? C
Min DC = 53% = 8 decimal (Table 11)
0
T MIN
16 28 40
TEMPERATURE ( ? C)
60
Figure 26. Effect of Changing Minimum Duty Cycle
on Control Loop with Fixed T MIN and T RANGE Values
http://onsemi.com
15
相关PDF资料 |
PDF描述 |
|---|---|
| ASM24DRKH | CONN EDGECARD 48POS DIP .156 SLD |
| PCA9551PW,112 | IC LED DRIVER BLINKER 16-TSSOP |
| ASM06DREN | CONN EDGECARD 12POS .156 EYELET |
| TACL335K006X | CAP TANT 3.3UF 6.3V 10% 0603 |
| ASM06DREH | CONN EDGECARD 12POS .156 EYELET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1031ARQZ-R7 | 功能描述:IC SENSOR 2TEMP/FAN CTRL 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 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:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADM1031ARQZ-REEL | 功能描述:板上安装温度传感器 2 CH TDM PWM FAN CTRL IC RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| ADM1031ARQZ-REEL7 | 功能描述:IC SENSOR 2TEMP/FAN CTRL 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 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:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADM1032 | 制造商:AD 制造商全称:Analog Devices 功能描述:+-1C Remote and Local System Temperature Monitor |
| ADM1032_12 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1C Remote and Local System Temperature Monitor Supports SMBus Alert |
发布紧急采购，3分钟左右您将得到回复。