FAN4147SX [ONSEMI]
接地故障断路器;
| 型号： | FAN4147SX |
| 厂家： | 
ONSEMI |
| 描述： | 接地故障断路器 光电二极管 断路器 |
| 文件： | 总11页 (文件大小：789K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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June 2013
FAN4147
接地故障断路器
产品特性
说明
FAN4147为低功率接地故障断路器（GFI）控制器，用于
检测危险的接地路径以及接地对零线故障。FAN4147的
应用电路可以在危险的电击前断开负载。
.
.
.
.
.
.
.
.
.
.
.
.
.
应用于GFCI和RCD
精密感应放大器与带隙基准
内置交流整流器
FAN4147内部包含一个二极管整流器、高精度12V带隙并
联稳压器、精密的低VOS失调感应放大器、延时噪声滤波
器、窗口检测比较器和一个晶闸管驱动器。通过最少数目
的外部器件，FAN4147侦测并防护火线对地故障和零线对
负载短路。器件数量最少以及小型SuperSOT™封装，使
得FAN4147成为超小型、低成本的应用解决方案。
内置噪声滤波器
低压晶闸管禁用
直接直流耦合至感应线圈
晶闸管门极驱动器
可调敏感度
FAN4147电路包含一个内置整流器和并联稳压器，只需
较低的静态电流，允许使用高值、低功率系列电阻。内置
温度补偿的并联稳压器、感应放大器以及偏置电路提供高
精度对地故障检测。低VOS失调感应放大器允许感应线圈
直接耦合到放大器的反馈信号端，无需大容量的50/60Hz
交流耦合电容。内置的延时滤波器能够滤除感性负载中的
高频噪声尖峰，减少了虚假有害触发。内置的晶闸管驱动
器具有温度补偿，该设计可以满足在宽范围内选择外部晶
闸管的电流要求。
静态电流
最少外部器件
满足UL 943B要求
适合120V 或 220V系统
空间节省的SuperSOT™6引脚封装
适用范围
外部元件数量最少以及6引脚SuperSOT™封装带来了低
成本、紧凑设计和布局。
.
.
.
GFCI输出接口
GFCI电路断路器
便携式GFCI线路
订购信息
器件型号
工作温度范围
封装
包装方法
卷带
FAN4147SX
-35°C至85°C
6-Lead SUPERSOT6, JEDEC MO-193, 1.6mm
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN4147 • Rev. 1.0.1
框图
AMPOUT
VS
C1
I1
VFB
SCR
VREF
A1
Delay
T1
SCR
Driver
Q1
R1
VTH
C2
VS
VREF
VTH
Neutral
Line
VREF
Rectifier
and Bias
图1.
框图
典型应用
TEST
RTEST
Neutral Coil 1:200
Sense Coil 1:1000
Load Hot
Line Hot
Load Neutral
Line Neutral
C2
C3
MOV
RIN
Q1
RSET
AmpOut
VFB
SCR
C1
C4
Neutral
Line
VREF
R1
图2.
典型应用(1)
典型值
RSET: 511K (2)
RIN: 470Ω
C1: 22nF
C2: 10nF
C3=1nF
R1: 91K
RTEST: 15KΩ
C4=10nF
注意:
1. 联系飞兆半导体，了解最佳应用实践，抑制有害触发。
2. 精确值取决于感应线圈特性和应用。
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN4147 • Rev. 1.0.1
2
引脚布局
6
5
4
1
2
3
PI 1
AmpOut
VF
SC
Neutral
Line
VRE
图3.
引脚布局
引脚说明
引脚号
名称
说明
1
2
3
4
5
6
SCR
Neutral
Line
外部晶闸管的门极驱动
FAN4147电路的电源零线输入
FAN4147电路的电源火线输入
电流感应放大器的非反相输入
电流感应放大器的反相输入
VREF
VFB
AmpOut VFB引脚上连接一个外部电阻，设置 Ifault 灵敏度阈值
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN4147 • Rev. 1.0.1
3
绝对最大额定值
如果应力超过绝对最大额定值，设备就会毁损。在推荐的工作条件之上，该设备可能无法正常运行或操作，且不建议让
设备在这些条件下长期工作。此外，过度暴露在高于推荐的工作条件下，会影响器件的可靠性。绝对最大额定值仅是额
定应力值。
符号
参数
最小值
最大值
单位
mA
V
ICC
连续电流，火线到零线
连续电压，火线到零线
15
16
-1.2
-0.8
-65
VCC
连续电压到零线，所有其他引脚
存储温度范围
15
V
TSTG
+150
2.5
1.0
0.2
°C
人体模式，JESD22-A114
ESD
静电放电防护等级
带电设备模式，JESD22-C101
机械模式，JESD22-A115
kV
推荐工作条件
推荐的操作条件表定义了真实设备的工作条件。指定推荐的工作条件，以确保设备的最佳性能达到数据表中的规格。飞
兆半导体建议不超过推荐的工作条件，或将绝对最大额定值设计为工作条件。（若无其他指定要求，请参考图2。）
符号
参数
工作条件
最小值 典型值 最大值 单位
直流电气特性（TA=25°C，Ishunt=1mA）
电源到零线
12.2
-0.9
350
5.8
12.7
-0.7
400
6.0
3.5
0
13.2
V
V
VREG
电源并联稳压器电压
电源到零线, Ishunt=-2mA
电源到零线=10V
VREF 到零线
IQ
VREF
VTH
VOS
IOS
静态电流
450
6.2
3.6
450
50
µA
V
参考电压
触发阈值
AmpOut 到 VREF
RSET=511KΩ, RIN=500Ω
设计值
3.4
V
放大器偏置
-450
-50
µV
nA
dB
MHz
放大器输入偏置(0)
放大器直流增益( (0)
放大器增益带宽(0)
0
G
设计值
100
1.5
fGBW
设计值
VSW+
VSW-
放大器正电压摆幅
放大器负电压摆幅
AmpOut 到 VREF, IFAULT=10µA
4.0
4.0
V
V
VREF到AmpOut, IFAULT=10µA
AmpOut=VREF + 3V,
VFB=VREF + 100mV
ISINK
ISRL
放大器电流槽
放大器电流源
400
µA
AmpOut=VREF – 3V,
VFB=VREF - 100mV
400
0.7
µA
ms
K
td
延时滤波器
从C1触发到晶闸管的时延从低到高
SCR－零线=250mV, AmpOut=VREF
1.0
0.5
1.3
1.0
ROUT
SCR输出电阻
SCR－零线, AmpOut=VREF
1
10
mV
V
VOUT
SCR输出电压
SCR输出电流
SCR－零线, AmpOut=VREF+4V
2.5
SCR－零线=1V
AmpOut=VREF + 4V
IOUT
说明：
350
500
µA
3. 由设计保证；未经产品测试。
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN4147 • Rev. 1.0.1
4
功能说明
（参考图 1和图 2）。
接地零线侦测的灵敏度随零线线圈匝数和C2, C3值而变
化。
FAN4147为GFCI控制器，专门用于交流接地故障断路
器。在交流电源的正半周，内置整流器整流。内置12V并
联稳压器采用了精密温度补偿带隙基准。精密的基准电路
与精密的感应放大器的组合，提供了精确的接地故障容
差。使外部元件的参数选择范围更广泛和更低廉。由于所
需 静 态 电 流 较 低 ， 可 以 采 用 高 值 的 外 部 串 联 电 阻
（R1），大大降低功耗。12V并联稳压器为感应放大器
（A1）的非反相输入端（AC接地参考）提供参考电压，
并且给延时定时器（T1）、比较器（C1 & C2）和晶闸管
驱动器提供偏压。
R
SET 电阻的计算
AmpOut的信号必须超过窗口比较器的阈值电压VTH，持
续时间超过延时定时器时间。因此：
(1)
VTH=IFAULT x 1.41 x RSET x COS(2 x (t/2P)) / N
(2)
RSET=(VTH x N) / (1.41 x IFAULT x COS( x t/P))
其中：
VTH
=
=
3.5V ;
感应变压器的次级绕组连接至引脚4（VREF），电阻RIN直
接直流耦合到感应放大器的反相输入端引脚5（VFB）。
反馈电阻RSET将感应变压器的次级绕组电流在引脚 6
(AmpOut)处转换成电压。该电压与内置窗口比较器（C1
和C2）进行比较，如果AmpOut的电压超过阈值电压+/-
IFAUL
T
5mA (UL943) ;
t
=
=
=
=
1ms（定时器延时）；
P
交流电源周期(1/60Hz)；
次级与初级匝比(1000:1)
505K（511K标准 1%）
VTH，窗口比较器就会触发内部延时定时器。窗口比较器
N
的输出必须在定时器t1时段保持高电平。如果窗口比较器
的输出为低电平，内置延时定时器将开始复位。如果在t1
脉冲结束时，窗口比较器输出一直为高电平，则晶闸管驱
动器启动电流源I1，禁止Q1。然后电流源I1开启外部晶闸
管，给电磁阀通电，打开连接负载的接触开关，从而消除
有害接地故障。窗口比较器允许检测正的或负的IFAULT信
号，不依赖于电源电压的相位。
RSET
说明：
4. 在实际中，由于变压器不理想，需要调节RSET，范
围高达30%，才能获得所需的Ifault触发阈值
VOS触发阈值误差的计算
由于感应线圈直接连接到感应放大器的反馈端，VOS偏置
会引入一个Ifault阈值误差。误差的计算方法为：
感应变压器通常都有一个由复合钢环或者固体铁氧体制成
的环形磁芯。一般情况下，变压器次级要求由40#线在该
环形磁芯上绕800匝至1500匝。变压器初级通常为一到两
匝，交流火线和零线穿过该环形磁芯中央。当接地故障出
现时，流入火线与零线的电流出现偏差。通过将初级差动
电流除以初级与次级之间的匝比就可得到了变压器的次级
电流。
%Error=
100 x (VOS x RSET) / (RIN + RLDC + RLAC) / VTH
where:
(3)
VOS
=
=
=
=
=
=
+/-450V（最坏情况）；
+/-150V（典型值）；
511K
零线在零线负载侧接地时出现接地零线故障。
RSET
RIN
根据接地零线的阻抗，该故障令感应线圈侦测到更低的接
地故障电流。地对负载对零线故障的侦测应根据正向反馈
原理。出现这种情况时，感应和零线线圈双向耦合，可以
在感应放大器周围产生正向反馈路径。这种正向反馈使得
感应放大器出现共振。峰值共振电压超过晶闸管触发阈值
时，将启用内置延时定时器。由于放大器输出信号跨越窗
口比较器的触发阈值的典型值为6kHz，延迟定时器将在故
障/无故障侦测之间转换。如果启用了晶闸管驱动器，可
确定故障/无故障侦测时间延迟。
470（典型值）；
RLDC
RLAC
75（感性线圈次级直流电阻）；
1.5 K（AC(jL) 感应线圈阻抗）
（L= 4H，f= 60Hz）；
VTH
=
=
3.5V;
%Error
+/- 3.2%（最差情况）；+/- -1.1%
（典型值）
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN4147 • Rev. 1.0.1
5
典型性能特征
若无其他说明，所有值都是在TA=25°C, 晶闸管断开（根据图2）情况下得到。
在VAC正半周，将电源（引脚3）
钳位于12.7V
通道1：电源（引脚3） 10V/Div
通道2：AmpOut（引脚6）
10V/Div
通道3：VREF（引脚4） 10V/Div
通道4：VAC输入，200V/Div
图4.
无接地故障时典型波形
I
Fault 信号的方向
IFault = (VAmpout – VREF)•N/RSET
通道1：Line (引脚3) 10V/Div
通道2：AmpOut (引脚6) 5V/Div
通道3：SCR (引脚1) 1V/Div
通道4：IFault 10mA/Div
图5.
4mA接地故障时典型波形
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN4147 • Rev. 1.0.1
6
典型性能特征
若无其他说明，所有值都是在TA=25°C, 晶闸管断开（根据图2）情况下得到。
SCR 输出触发
通道1：Line (引脚 3) 10V/Div
通道2：AmpOut (引脚6) 5V/Div
通道3：SCR (引脚1) 1V/Div
通道4：IFault 10mA/Div
图6.
5mA接地故障时典型波形
SCR 输出触发
通道1：Line (引脚3) 10V/Div
通道2：AmpOut (引脚6) 5V/Div
通道3：SCR (引脚1) 1V/Div
通道4：IFault 10mA/Div
图7.
5mA接地故障时典型波形（线路极性反转）
© 2010 Fairchild Semiconductor Corporation
FAN4147 • Rev. 1.0.1
www.fairchildsemi.com
7
典型性能特征
若无其他说明，所有值都是在TA=25°C, 晶闸管断开（根据图2）情况下得到。
2Ω 接地零线故障时发生感应放大
器共振
通道1：Line (Pin 3) 10V/Div
通道2：AmpOut (Pin 6) 5V/Div
通道3：SCR (Pin 1) 1V/Div
图8.
接地火线检测的典型波形
~6.9KHz Sense Amplifier
Oscillation
Ch2: AmpOut (Pin 6) 2V/Div
图9.
接地火线检测的典型波形
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN4147 • Rev. 1.0.1
8
SYMM
C
L
0.95
0.95
C
3.00
2.80
A
1.00 MIN
6
4
B
3.00
2.60
2.60
1.70
1.50
C
1
3
0.50
0.30
0.95
0.70 MIN
M
0.20
A B
1.90
LAND PATTERN RECOMMENDATION
SEE DETAIL A
(0.30)
1.10 MAX
H
1.00
0.70
C
0.10
0.20
0.08
0.10
0.00
NOTES: UNLESS OTHERWISE SPECIFIED
A) THIS PACKAGE CONFORMS TO JEDEC MO-193.
VAR. AA, ISSUE E.
C
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C PACKAGE LENGTH DOES NOT INCLUDE MOLD
FLASH, PROTRUSIONS OR GATE BURRS. MOLD
FLASH, PROTRUSIONS OR GATE BURRS SHALL
NOT EXCEED 0.25mm PER END. PACKAGE WIDTH
DOES NOT INCLUDE INTERLEAD FLASH OR
PROTRUSION. INTERLEAD FLASH OR
GAGE PLANE
0.25
8°
0°
PROTRUSION SHALL NOT EXCEED 0.25mm PER
SIDE. PACKAGE LENGTH AND WIDTH DIMENSIONS
ARE DETERMINED AT DATUM H.
D) DRAWING FILE NAME: MKT-MA06AREVF
0.55
0.35
SEATING PLANE
0.60 REF
DETAIL A
SCALE: 50X
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regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
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