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| 型号： | ADM1030ARQZ-RL7 |
| 厂商： | ON Semiconductor |
| 文件页数： | 14/30页 |
| 文件大小： | 327K |
| 描述： | IC SNSR TEMP/FAN PWM CTRL 16QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Obsolescence 11/Feb/2009 |
| 标准包装： | 1,000 |
| 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，±1°C（最小值） |
| 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： | 带卷 (TR) |
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ADM1030
http://onsemi.com
14
predetermined time, and once the fan has spun up, its
running speed may be reduced in line with the temperature
being measured.
The ADM1030 allows fan spin-up times between 200 ms
and 8 seconds. Bits <2:0> of Fan Characteristics Register 1
(Register 0x20) program the fan spin-up time.
Table 9. FAN SPIN-UP TIMES
Bits 2:0
Spin-up Times
(Fan Characteristics Register 1)
000
200 ms
001
400 ms
010
600 ms
011
800 ms
100
1 sec
101
2 sec (Default)
110
4 sec
111
8 sec
Once the Automatic Fan Speed Control Loop parameters
have been chosen, the ADM1030 device may be
programmed. The ADM1030 is placed into Automatic Fan
Speed Control Mode by setting Bit 7 of Configuration
Register 1 (Register 0x00). The device powers up into
Automatic Fan Speed Control Mode by default. The control
mode offers further flexibility in that the user can decide
which temperature channel/channels control the fan.
Table 10. AUTO MODE FAN BEHAVIOR
Bits 6, 5
Control Operation (Config Register 1)
00
Remote Temperature Controls the Fan
11
Maximum Speed Calculated by Local and
Remote Temperature Channels Control the Fan
When Bits 5 and 6 of Config Register 1 are both set to 1,
it offers increased flexibility. The local and remote
temperature channels can have independently programmed
control loops with different control parameters. Whichever
control loop calculates the fastest fan speed based on the
temperature being measured, drives the fan.
Figures 24 and 25 show how the fans PWM duty cycle is
determined by two independent control loops. This is the
type of Auto Mode Fan Behavior seen when Bits 5 and 6 of
Config Register 1 are set to 11. Figure 24 shows the control
loop for the Local Temperature channel. Its T
MIN
value has
been programmed to 20癈, and its T
RANGE
value is 40癈.
The local temperatures T
MAX
will thus be 60癈. Figure 25
shows the control loop for the Remote Temperature channel.
Its T
MIN
value has been set to 0癈, while its
T
RANGE
= 80癈. Therefore, the Remote Temperatures
T
MAX
value will be 80癈.
Consider if both temperature channels measure 40癈.
Both control loops will calculate a PWM duty cycle of 66%.
Therefore, the fan will be driven at 66% duty cycle.
If both temperature channels measure 20癈, the local
channel will calculate 33% PWM duty cycle, while the
remote channel will calculate 50% PWM duty cycle. Thus,
the fan will be driven at 50% PWM duty cycle. Consider the
local temperature measuring 60癈 while the remote
temperature is measuring 70癈. The PWM duty cycle
calculated by the local temperature control loop will be
100% (since the temperature = T
MAX
). The PWM duty
cycle calculated by the remote temperature control loop at
70癈 will be approximately 90%. So the fan will run
full-speed (100% duty cycle). Remember, that the fan speed
will be based on the fastest speed calculated, and is not
necessarily based on the highest temperature measured.
Depending on the control loop parameters programmed, a
lower temperature on one channel, may actually calculate a
faster speed, than a higher temperature on the other channel.
33
40
47
53
60
66
73
80
87
93
100
Figure 24. Max Speed Calculated by Local
Temperature Control Loop Drives Fan
LOCAL TEMPERATURE (癈)
T
MAX
= T
MIN
+ T
RANGE
T
MIN
0
20
40
60
T
RANGE
= 40癈
Figure 25. Max Speed Calculated by Remote
Temperature Control Loop Drives Fan
33
40
47
53
60
66
73
80
87
93
100
REMOTE TEMPERATURE (癈)
T
MAX
= T
MIN
+ T
RANGE
T
MIN
0
20
40
70
80
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| ADM1031 | 制造商:AD 制造商全称:Analog Devices 功能描述:Intelligent Temperature Monitor and Dual PWM Fan Controller |
| ADM1031ARQ | 功能描述:IC SENSOR 2-TEMP/FAN CTRL 16QSOP RoHS:否 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 |
| ADM1031ARQ-ND | 制造商:ON Semiconductor 功能描述: |
| ADM1031ARQ-REEL | 功能描述:IC SENSOR 2-TEMP/FAN CTRL 16QSOP RoHS:否 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 |
| ADM1031ARQ-REEL7 | 功能描述:IC SENSOR 2-TEMP/FAN CTRL 16QSOP RoHS:否 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 |
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