參數(shù)資料
型號(hào): W83L786G
廠商: Nuvoton Technology Corporation of America
文件頁數(shù): 22/57頁
文件大?。?/td> 812K
描述: IC H/W MONITOR 28-SSOP
標(biāo)準(zhǔn)包裝: 48
功能: 硬件監(jiān)控器
傳感器類型: 外部
感應(yīng)溫度: 外部傳感器
精確度: ±3°C(最小值)
拓?fù)洌?/td> ADC,風(fēng)扇控制,寄存器庫
輸出類型: I²C?/SMBus?
輸出警報(bào):
輸出風(fēng)扇:
電源電壓: 2.97 V ~ 3.63 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 28-SSOP
包裝: 管件
W83L786R/ W83L786G
7.6.3   SMART FANTM I Control
W83L786R/G supports two sets SMART FAN
TM
 I function and mapping to D+,D- (PWM/DC_OUT1),
VTIN1 (PWM/DC_OUT2) . If CR80 [3:2] or CR80 [5:4] set to 2b10, Fan1 or Fan2 will enable SMART
FAN
TM
 I function.
At this mode, W83L786R/G provides the SMART FAN
TM
 system to automatically control fan speed to
keep the temperatures of CPU and the system within specific range. At first a wanted temperature and
interval must be set (ex. 55 癈 ?3 癈) by BIOS and the fan speed will be lowered as long as the
current temperature remains below the setting value. Once the temperature exceeds the high limit
(58癈), the fan will be turned on with a specific speed set by BIOS (ex: 80% duty cycle) and
automatically controlled its PWM duty cycle with the temperature varying. Three conditions may occur:
(1) If the temperature still exceeds the high limit (ex: 58癈), PWM duty cycle will increase slowly. If the
fan has been operating in its full speed but the temperature still exceeds the high limit (ex: 58癈),
a warning message will be issued to protect the system.
(2) If the temperature goes below the high limit (ex: 58癈), but still above the low limit (ex: 52癈), the
fan speed will be fixed at the current speed because the temperature is in the target range (ex: 52
癈 ~ 58癈).
(3) If the temperature goes below the low limit (ex: 52癈), PWM duty cycle will decrease slowly to 0 or
a preset stop value until the temperature exceeds the low limit.
Figure 11-1, 11-2 gives an illustration of Thermal Cruise Mode.
55`C
58`C
52`C
PWM
Duty
Cycle
100
0
50
Fan Start = 20%
A
B
C
D
 
Figure 11-1
Publication Release Date: March 06
  - 17 -
Revision0.8
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