- 您現在的位置：買賣IC網 > PDF目錄363903 > W83781 (WINBOND ELECTRONICS CORP) MONITORING IC PDF資料下載
參數資料
| 型號： | W83781 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | MONITORING IC |
| 中文描述： | 監測集成電路 |
| 文件頁數： | 18/53頁 |
| 文件大小： | 725K |
| 代理商： | W83781 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁
W83781D
PRELIMINARY
- 13 -
Publication Release Date : Nov. 1997
Revision 0.60
The input voltage can be expressed as following equation.
V
V
R
+
1
R
R
IN
s
=
×
2
2
The value of R
1
and R
2
can be selected to 28K Ohms and 10K Ohms, respectively, when the input
voltage is 12V. The Pin 33 is connected to +5V power supply to provide analog power, and this
voltage is connected to internal resistors to monitor the +5V voltage.
The negative voltage should be connected an op amps to invert and reduce the -5V and -12V
voltage. The input voltage can be calculated by following equation.
V
V
R
R
S
IN
F
IN
=
×
(
)
The Winbond recommended value is R
IN
=90.9K Ohms and R
F
=60.4K Ohms for -5V voltage input,
R
IN
=210K Ohms and R
F
=60.4K Ohms for -12V voltage input.
The temperature sensors are connected by a 10K Ohms, then connect to VREF (Pin 37). The sensors
should choose 10K Ohms at 25
C and B-value is 3435 for default R-T table. If the B-value is not
3435, the R-T table should be re-program to generate a correct temperature.
7.3 FAN Inputs and FAN Control
Inputs are provides for signals from fans equipped with tachometer outputs. The level of these signals
should be set to TTL level, and maximum input voltage can not be over +5.5V. 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 as following.
Determine the fan counter according to:
Count
RPM Divisor
=
135 10
6
The default divisor is 2 and defined at CR47.bit7~4 and CR4B.bit7~6. The followed table is an
example for the relation of divisor, PRM, and count.
Divisor
Nominal
PRM
Time per
Revolution
Counts
70% RPM
Time for 70%
1
8800
6.82 ms
153
6160
9.74 ms
2
4400
13.64 ms
153
3080
19.48 ms
3
2200
27.27 ms
153
1540
38.96 ms
4
1100
54.54 ms
153
770
77.92 ms
相關PDF資料 |
PDF描述 |
|---|---|
| W83783 | CABLE ASSEMBLY; BNC MALE TO BNC FEMALE BULKHEAD; 50 OHM, RG188-DS COAX, DOUBLE SHIELDED; 48" CABLE LENGTH; ; *USES STANDARD 50 OHM INTERFACE CONNECTORS* |
| W83783S | MONITORING IC |
| W83787IF | WINBOND I/O WITH SERIAL-INFRARED SUPPORT |
| W83787F | WINBOND I/O WITH SERIAL-INFRARED SUPPORT |
| W83791D | W83791D Winbond H/W Monitoring IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W83781D | 制造商:Winbond Electronics Corp 功能描述:SPECIALTY ANALOG CIRCUIT, PQFP48 |
| W83781G | 功能描述:IC MONITOR H/W 48-LQFP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:1 系列:- 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| W83782 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:MONITORING IC |
| W83782D | 制造商:WINBOND 制造商全稱:Winbond 功能描述:H/W MONITORING IC |
| W83782D_05 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:H/W MONITORING IC |
發布緊急采購，3分鐘左右您將得到回復。