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参数资料
| 型号： | DS1231S |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | Power Monitor Chip(电源监控芯片) |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | 0.300 INCH, SOIC-16 |
| 文件页数： | 5/9页 |
| 文件大小： | 70K |
| 代理商： | DS1231S |
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
μ
A with a V
TP
+ 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
μ
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
+5V
DC
IN
MODE
TOL
GND
V
CC
NMI
RST
RST
-10% V
CC
THRESHOLD
TO
μ
P
DS1231
+5V
DC
VOLTAGE SENSE POINT
NOTE: RST requires a pull–up resister.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1231S-20 | 功能描述:监控电路 Power Monitor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1231S-20/T&R | 制造商:Maxim Integrated Products 功能描述:POWER MONITOR-20-16PIN-SOIC-TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POWER MONITOR 20NS 16-SOIC 制造商:Maxim Integrated Products 功能描述:Supervisory Circuits Power Monitor |
| DS1231S-20/T&R | 功能描述:监控电路 Power Monitor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1231S-20+ | 功能描述:监控电路 Power Monitor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| DS1231S-20+T&R | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.62V/4.37V 2000UA 16SOIC W - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POWER MONITOR 20NS 16-SOIC 制造商:Maxim Integrated Products 功能描述:Supervisory Circuits Power Monitor |
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