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參數(shù)資料
| 型號： | DS1231SN-20 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | 0.300 INCH, SOIC-16 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 70K |
| 代理商： | DS1231SN-20 |
DS1231/S
022698 5/9
APPLICATION – MODE PIN CONNECTED TO
GROUND
When the Mode pin is connected to ground, pin 1 is a
current source of 30
A with a VTP+ of 2.5 volts. Pin 1 is
held below the trip point by a switching device like an
opto-isolator as shown in Figure 6. Determination of the
sense point has the same criteria as discussed in the
previous application. However, determining component
values is significantly different. In this mode, the maxi-
mum dynamic range of the sense point versus desired
trip voltage is primarily determined by the selection of a
zener diode. As an example, if the maximum voltage at
the sense point is 200V and the desired trip point is
150V, then a zener diode of 150V will approximately set
the trip point. This is particularly true if power consump-
tion on the high voltage side of the opto-isolator is not an
issue. However, if power consumption is a concern,
then it is desirable to make the value of R1 high. As the
value of R1 increases, the effect of the LED current in
the opto-isolator starts to affect the IN trip point. This can
be seen from the equation shown in Figure 6. R1 must
also be low enough to allow the opto-isolator to sink the
30
A of collector current required by pin 1 and still have
enough resistance to keep the maximum current
through the opto-isolator’s LED within data sheet limits.
Figure 7 illustrates how the DS1231 can be interfaced to
the AC power line when the mode pin is grounded.
AC VOLTAGE MONITOR WITH TRANSFORMER ISOLATION Figure 5
+5VDC
IN
MODE
TOL
GND
VCC
NMI
RST
-10% VCC THRESHOLD
TO
P
DS1231
+5VDC
VOLTAGE SENSE POINT
NOTE: RST requires a pull–up resister.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1231SN-35 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
| DS1231SN-50 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
| DS1232 | 功能描述:監(jiān)控電路 MicroMonitor Chip RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1232+ | 功能描述:監(jiān)控電路 MicroMonitor Chip RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1232G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
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