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参数资料
| 型号： | LM1851MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| 封装： | DIE |
| 文件页数： | 7/10页 |
| 文件大小： | 202K |
| 代理商： | LM1851MDC |
Application Circuits (Continued)
in practice the actual value of C1 will have to be modified to
include the effects of the neutral loop upon the net charging
current The effect of neutral loop induced currents is diffi-
cult to quantize but typically they sum with normal fault cur-
rents thus allowing a larger value of C1
For UL943 requirements 0015 mF has been found to be
the best compromise between timing and noise
For those GFI standards not requiring grounded neutral de-
tection a still larger value capacitor can be used and better
noise immunity obtained The larger capacitor can be ac-
commodated because RN and RG are not present allowing
the full fault current I to enter the GFI
In
Figure 2 grounded neutral detection is accomplished by
feeding the neutral coil with 120 Hz energy continuously and
allowing some of the energy to couple into the sense trans-
former during conditions of neutral fault
Typical Application
TLH5177 – 6
Adjust RSET for desired sensitivity
FIGURE 2 120 Hz Neutral Transformer Approach
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM1851MX | 功能描述:电流和电力监控器、调节器 RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| LM1851MX/NOPB | 功能描述:电流和电力监控器、调节器 RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| LM1851N | 功能描述:电流和电力监控器、调节器 RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| LM1851N/A+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Ground Fault Interrupter |
| LM1851N/B+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Ground Fault Interrupter |
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