參數(shù)資料
型號(hào): W83L786G
廠商: Nuvoton Technology Corporation of America
文件頁數(shù): 18/57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
7.5.3   Temperature Fault (TEMP_FAULT #)
W83L786R/G provides a good protection for temperature fault. Set Pin 28 (TEMP_FAULT#) to monitor
temperature. When D+-D- (Pin16, 15), VTIN1 (Pin14), or VTIN2 (Pin13) temperature exceeds
temperature fault limit in VR35, VR37, or VR39, Pin 28 TEMP_FAULT# will be asserted (Figure 6).
F i g  u  r e 6  . T  E  M   P  _  F  A  U  L  T
T  E  M   P  _  F  A  U  L  T   l i m  i t
T  E  M   P  _  F  A  U  L  T  #
 
7.6   FAN Speed Count and FAN Speed Control
7.6.1   Fan Speed Count
Inputs are provided by the signals from fans equipped with tachometer outputs. The level of these
signals should be set to TTL level, and maximum input voltage cannot be over VCC. If the input
signals from the tachometer outputs are over the VCC, the external trimming circuit should be added
to reduce the voltage to obtain the input specification. The normal circuit and trimming circuits are
shown in Figure 7.
Determine the fan counter according to:
Count
RPM   Divisor
=
?/DIV>
?/DIV>
135  10
6
.
 
In other words, the fan speed counter has been read from register VR28 or VR29, and the fan speed
can be evaluated by the following equation.
RPM
Count   Divisor
=
?/DIV>
?/DIV>
135   10
6
.
 
The default divisor is 2 and defined at CR54.bit0~2, bit4~6 which are three bits for divisor. That
provides very low speed fan counter such as power supply fan. Table 2 is an example for the relation
of divisor, RPM, and count.
 
Publication Release Date: March 06
  - 13 -
Revision0.8
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