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參數(shù)資料
| 型號(hào)： | LM96000 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Hardware Monitor with Integrated Fan Control |
| 中文描述： | 硬件監(jiān)控集成風(fēng)扇控制 |
| 文件頁數(shù)： | 19/28頁 |
| 文件大?。?/td> | 695K |
| 代理商： | LM96000 |
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Functional Description
(Continued)
TABLE 5. Fan Spin-Up Register
SPIN[2:0]
000
001
010
011
100
101
110
111
Spin Up Time
0 sec
100 ms
250 ms
400 ms
700 ms
1000 ms
2000 ms
4000 ms
4.15 Registers 5F-61h: Auto Fan Speed Range, PWM Frequency
Register
Address
5Fh
Read/
Write
R/W
Register
Name
Zone1 Range/Fan1
Frequency
Zone2 Range/Fan2
Frequency
Zone3 Range/Fan3
Frequency
Bit 7
(MSB)
RAN3
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
FRQ0
Default
Value
C4h
Lock
RAN2
RAN1
RAN0
HLFRQ
FRQ2
FRQ1
U
60h
R/W
RAN3
RAN2
RAN1
RAN0
HLFRQ
FRQ2
FRQ1
FRQ0
C4h
U
61h
R/W
RAN3
RAN2
RAN1
RAN0
HLFRQ
FRQ2
FRQ1
FRQ0
C4h
U
In Auto Fan Mode, when the temperature for a zone is above the Temperature Limit (Registers 67-69h) and below its Absolute
Temperature Limit (Registers 6A-6Ch), the speed of a fan assigned to that zone is determined as follows.
When the temperature reaches the Fan Temp Limit for a zone, the PWM output assigned to that zone will be Fan PWM Minimum.
Between Fan Temp Limit and (Fan Temp Limit + Range), the PWM duty cycle will increase linearly according to the temperature
as shown in the figure below. The PWM duty cycle will be 100% at (Fan Temp Limit + Range).
Example for PWM1 assigned to Zone 1:
– Zone 1 Fan Temp Limit (Register 67h) is set to 50C (32h).
– Range (Register 5Fh) is set to 8C (6xh).
– Fan 1 PWM Minimum (Register 64h) is set to 50% (32h).
In this case, the PWM1 duty cycle will be 50% at 50C.
Since (Zone 1 Fan Temp Limit) + (Zone 1 Range) = 50C + 8C = 58C, the fan will run at 100% duty cycle when the temperature
of the Zone 1 sensor reaches 58C.
Since the midpoint of the fan control range is 54C, and the median duty cycle is 75% (Halfway between the PWM Minimum and
100%), PWM1 duty cycle would be 75% at 54C.
20084606
FIGURE 1. Fan Activity above Fan Temp Limit
L
www.national.com
19
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| LM96000CIMT | 功能描述:板上安裝溫度傳感器 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 |
| LM96000CIMT/NOPB | 功能描述:板上安裝溫度傳感器 HW Monitor 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 |
| LM96000CIMT/NOPB | 制造商:Texas Instruments 功能描述:Temperature Sensor IC |
| LM96000CIMTX | 功能描述:板上安裝溫度傳感器 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 |
| LM96000CIMTX/NOPB | 功能描述:板上安裝溫度傳感器 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 |
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