参数资料
| 型号： | RV4141AM |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | CONTROLLER GROUND FAULT 8-SOIC |
| 标准包装： | 95 |
| 应用： | 接地故障保护 |
| 电流 - 电源： | 10mA |
| 工作温度： | -35°C ~ 80°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 管件 |
The SCR anode is directly connected to a solenoid or
relay coil. It can be tripped only when its anode is more
positive than its cathode. It must have a high dV/dt
rating to ensure that line noise (generated by electrically
noisy appliances) does not falsely trigger it. Also the
SCR must have a gate drive requirement less than
200 μ A. C3 is a noise filter that prevents high-frequency
line pulses from triggering the SCR. The relay solenoid
Calculating the Values of R SET and C2
Determine the nominal ground-fault trip-current
requirement. This is typically 5mA in North America
(117V AC ) and 22mA in the UK and Europe (220V AC ).
Determine the minimum delay time required to prevent
nuisance tripping, typically 1 to 2ms. The value of C2
required to provide the desired delay time is:
should have a response time of 3ms or less to meet the
UL 943 timing requirement.
C 2 ? 6 ? t
where:
(2)
R SET ?
I FAULT ? COS 180(t/P)
Sense Transformers and Cores
The sense and ground/neutral transformer cores are
usually fabricated using high-permeability laminated
steel rings. Their single-turn primary is created by
passing the line and neutral wires through the center of
its core. The secondary is usually from 200 to 1500
turns. Transformers may be obtained from Magnetic
Metals, Inc. ( www.magmet.com ).
C2 is in Nf and t is the desired delay time in ms.
The value of R SET to meet the nominal ground fault trip
current specification is:
4.6 ? N
(3)
where:
R SET is in k ??
t is the time delay in ms;
P is the period of the line frequency in ms;
I FAULT is the desired ground fault trip current in mA RMS;
N is the number of sense transformer secondary turns.
Note:
2. This formula assumes an ideal sense transformer is
used. The calculated value of R SET may have to be
changed up to 30% when using a non-ideal
transformer.
Figure 3. GFI Application Circuit
? 2003 Fairchild Semiconductor Corporation
RV4141A ? Rev. 1.0.8
6
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RV4141AMT | 功能描述:其他电源管理 LOW POWER GFI RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| RV4141AMT_11 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Low-Power, Ground-Fault Interrupter |
| RV4141AMT_32 | 功能描述:其他电源管理 LOW POWER GFI RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| RV4141AN | 功能描述:其他电源管理 LP GFI Controller RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| RV4141AN_11 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Low-Power, Ground-Fault Interrupter |
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