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RV4145AM_NL

产品描述Power Supply Support Circuit, Fixed, 1 Channel, BIPolar, PDSO8, LEAD FREE, PLASTIC, SOIC-8
产品类别电源/电源管理    电源电路   
文件大小82KB,共10页
制造商Fairchild
官网地址http://www.fairchildsemi.com/
下载文档 详细参数 选型对比 全文预览

RV4145AM_NL概述

Power Supply Support Circuit, Fixed, 1 Channel, BIPolar, PDSO8, LEAD FREE, PLASTIC, SOIC-8

RV4145AM_NL规格参数

参数名称属性值
厂商名称Fairchild
零件包装代码SOIC
包装说明SOP,
针数8
Reach Compliance Codeunknown
ECCN代码EAR99
可调阈值NO
模拟集成电路 - 其他类型POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码R-PDSO-G8
JESD-609代码e3
长度4.9 mm
信道数量1
功能数量1
端子数量8
最高工作温度85 °C
最低工作温度-35 °C
封装主体材料PLASTIC/EPOXY
封装代码SOP
封装形状RECTANGULAR
封装形式SMALL OUTLINE
认证状态Not Qualified
座面最大高度1.75 mm
最大供电电压 (Vsup)30 V
最小供电电压 (Vsup)24 V
标称供电电压 (Vsup)26 V
表面贴装YES
技术BIPOLAR
温度等级OTHER
端子面层MATTE TIN
端子形式GULL WING
端子节距1.27 mm
端子位置DUAL
宽度3.9 mm

RV4145AM_NL文档预览

www.fairchildsemi.com
RV4145A
Low Power Ground Fault Interrupter
Features
No potentiomenter required
Direct interface to SCR
Supply voltage derived from AC line – 26V shunt
Adjustable sensitivity
Grounded neutral fault detection
Meets U.L. 943 standards
450µA quiescent current
Ideal for 120V or 220V systems
Description
The RV4145A is a low power controller for AC outlet
ground fault interrupters. These devices detect hazardous
grounding conditions, such as equipment (connected to
opposite phases of the AC line) in contact with a pool of
water and open circuits the line before a harmful or lethal
shock occurs.
Contained internally are a 26V zener shunt regulator, an op
amp, and an SCR driver. WIth the addition of two sense
transformers, a bridge rectifier, an SCR, a relay, and a few
additional components, the RV4145A will detect and protect
against both hot wire to ground and neutral wire to ground
faults. The simple layout and conventional design ensure
ease of application and long-term reliability.
Block Diagram
RV4145A
V
FB
R1
10K
R2
10K
V
REF
(+13V)
+V
S
(+26V)
+Input
Op Amp Output
6.5V
6.5V
6.5V
6.5V
Ground
R3
4.7K
65-4145A-01
SCR Trigger
REV. 1.0.5 12/7/04
PRODUCT SPECIFICATION
RV4145A
Pin Assignments
8-Pin PDIP
8-Pin SOIC
V
FB
+Input
V
REF
GND
1
2
3
4
8
7
6
5
NC
Op Amp Output
+V
S
SCR Trigger
Absolute Maximum Ratings
(beyond which the device may be damaged)1
Parameter
Supply Current
Internal Power Dissipation
Storage Temperature Range
Operating Temperature Range
Junction Temperature
Lead Soldering Temperature
P
D
T
A
< 50°C
For T
A
> 50°C Derate at
60 Sec, DIP
10 Sec, SOIC
SOIC
PDIP
SOIC
PDIP
4
6
-65
-35
Min
Typ
Max
18
500
+150
+85
125°C
300
260
300
450
°C
°C
mW
mW
mW/°C
mW/°C
Units
mA
mW
°C
°C
Notes:
1. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if
Operating Conditions are not exceeded.
Operating Conditions
Parameter
θ
JA
Thermal resistance
SOIC
PDIP
Min
Typ
240
160
Max
Units
°C/W
°C/W
2
REV. 1.0.5 12/7/04
RV4145A
PRODUCT SPECIFICATION
Electrical Characteristics
Parameters
Detector Reference Voltage
Shunt Regulator
Zener Voltage (+V
S
)
Reference Voltage (V
REF
)
Quiescent Current (I
S
)
Operational Amplifier
Offset Voltage
+Output Voltage Swing
–Output Voltage Swing
+Output Source Current
–Output Source Current
Gain Bandwidth Product
Resistors
R1
R2
R3
SCR Trigger Voltage
Detector On
Detector Off
(I
S
= 1.5mA and T
A
= +25°C)
Test Conditions
Pin 7 to Pin 3
Pin 6 to Pin 4
Pin 3 to Pin 4
+V
S
= 24V
Pin 2 to Pin 3
Pin 7 to Pin 3
Pin 7 to Pin 3
Pin 7 to Pin 3
Pin 7 to Pin 3
F = 50KHz
I
S
= 0mA
Pin 1 to Pin 3
Pin 2 to Pin 3
Pin 5 to Pin 4
Pin 5 to Pin 4
1.5
0
2.8
1
10
V
mV
3.5
10
10
4.7
5.9
k
k
k
1.0
-3.0
6.8
-9.5
Min
6.8
25
12.5
Typ
7.2
26
13
450
0.5
7.2
-11.2
650
1.0
1.8
Max
8.1
29.2
14.6
750
+3.0
8.1
-13.5
Units
±V
V
V
µA
mV
V
V
µA
mA
MHz
Electrical Characteristics
Parameters
Detector Reference Voltage
Shunt Regulator
Zener Voltage (+V
S
)
Reference Voltage (V
REF
)
Quiescent Current (I
S
)
Operational Amplifier
Offset Voltage
+Output Voltage Swing
–Output Voltage Swing
Gain Bandwidth Product
Resistors
R1
R2
R3
SCR Trigger Voltage
Detector On
Detector Off
(I
S
= 1.5mA and -35°C
T
A
+85°C)
Test Conditions
Pin 7 to Pin 3
Pin 6 to Pin 4
Pin 3 to Pin 4
+V
S
= 23V
Pin 2 to Pin 3
Pin 7 to Pin 3
Pin 7 to Pin 3
F = 50KHz
I
S
= 0mA
Pin 1 to Pin 3
Pin 2 to Pin 3
Pin 5 to Pin 4
Pin 5 to Pin 4
1.3
0
2.8
3
50
V
mV
3.5
10
10
4.7
5.9
k
k
k
-5.0
6.5
-9
Min
6.5
24
12
Typ
7.2
26
13
500
0.5
7.2
-11.2
1.8
+5.0
8.3
-14
Max
8.3
30
15
Units
±V
V
V
µA
mV
V
V
MHz
REV. 1.0.5 12/7/04
3
PRODUCT SPECIFICATION
RV4145A
Principles of Operation
The 26V shunt regulator voltage generated by the string of
zener diodes is divided into three reference voltages: 3/4 V
S
,
1/2 V
S
, and 1/4 V
S
. V
REF
is at 1/2VS and is used as a refer-
ence to create an artifical ground of +13V at the op amp non-
inverting input.
Figure 1 shows a three-wire 120V AC outlet GFI application
using an RV4145A. Fault signals from the sense transformer
are AC coupled into the input and are amplified according to
the following equation:
V
7
= R
SENSE
×
I
SENSE
/N
Where V
7
is the RMS voltage at pin 7 relative to pin 3,
R
SENSE
is the value of the feedback resistor connected from
pin 7 to pin 1, I
SENSE
is the fault current in amps RMS and
N is the turns ratio of the transformer. When V
7
exceeds plus
or minus 7.2V relative to pin 3 the SCR Trigger output will
go high and fire the external SCR.
The formula for V
7
is approximate because it does not
include the sense transformer characteristics.
Grounded neutral fault detection is accomplished when a
short or fault closes a magnetic path between the sense trans-
former and the grounded neutral transformer. The resultant
AC coupling closes a positive feedback path around the op
amp, and therefore the op amp oscillates. When the peaks of
the oscillation voltage exceed the SCR trigger comparator
thresholds, the SCR output will go high.
The roll-off frequency is greater than the grounded neutral
fault oscillation frequency, in order to preserve loop gain for
oscillation (which is determined by the inductance of the
200:1 transformer and C4).
The senstivity to grounded neutral faults is adjusted by
changing the frequency of oscillation. Increasing the fre-
quency reduces the sensitivity by reducing the loop gain of
the positive feedback circuit. As frequency increases, the
signal becomes attenuated and the loop gain decreases. With
the values shown the circuit will detect a grounded neutral
fault having resistance of 2
or less.
The input to the op amp are protected from overvoltage by
back-toback diodes.
SCR Driver
The SCR used must have a high dV/dt rating to ensure that
line noise (generated by noisy appliances such as a drill
motor) does not falsely trigger the SCR. Also, the SCR must
have a gate drive requirement of less than 200µA. C
F
is a
noise filter capacitor that prevents narrow pulses from firing
the SCR.
The relay solenoid used should have a 3ms or less response
time in order to meet the UL 943 timing requirement.
Sense Transformers and Cores
The sense and grounded neutral transformer cores are usu-
ally 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.
Magnetic Metals Corporation, Camden, NJ 08101,
(609) 964-7842, and Magnetics, 900 E. Butler Road,
P.O. Box 391, Butler, PA 16003, (412) 282-8282 are full line
suppliers of ring cores and transformers designed specifi-
cally for GFI applications.
Shunt Regulator
R
LINE
limits the current into the shunt regulator; 220V
applications will require substituting a 47k
2W resistor. In
addition to supplying power to the IC, the shunt regulator
creates internal reference voltages (see above).
Operational Amplifier
R
SENSE
is a feedback resistor that sets gain and therefore
sensitivity to normal faults. To adjust R
SENSE
, follow this
procedure: apply the desired fault current (a difference in
current of 5mA is the UL 943 standard). Adjust R
SENSE
upward until the SCR activates. A fixed resistor can be used
for R
SENSE
, since the resultant ±15% variation in sensitivity
will meet UL’s 943 4-6mA specification window.
Two-Wire Application Circuit
Figure 2 shows the diagram of a 2-wire 120V AC outlet GFI
circuit using an RV4145A. This circuit is not designed to
detect grounded neutral faults. Thus, the grounded neutral
transformer and capacitors C3 and C4 of Figure 1 are not
used.
4
REV. 1.0.5 12/7/04
RV4145A
PRODUCT SPECIFICATION
R
TEST
15K
Mov
Sense Transformer
Press
To Test
Ground Neutral
Transformer
1000:1
Line
Hot
Neutral
R
SENSE
1M *
200:1
Latching
Contacts
K1
Load
C1
10µF
V
FB
RV4145
Op Amp Output
C3
0.01
µF
Solenoid
C4
0.03
µF
V
REF
(+13V)
+V
S
GND
SCR Trigger
R
LINE
24K
DB1
1N4004 (4)
Q1 ON Semi
MCR100-6
C2
0.01µF
C
F
2.2
µF
65-4145A-03
* Value depends on transformer characteristics.
Figure 1. GFI Application Circuit (Three-Wire Outlet)
REV. 1.0.5 12/7/04
5

RV4145AM_NL相似产品对比

RV4145AM_NL RV4145AN_NL RV4145AMT_NL
描述 Power Supply Support Circuit, Fixed, 1 Channel, BIPolar, PDSO8, LEAD FREE, PLASTIC, SOIC-8 Power Supply Support Circuit, Fixed, 1 Channel, BIPolar, PDIP8, LEAD FREE, PLASTIC, DIP-8 Power Supply Support Circuit, Fixed, 1 Channel, BIPolar, PDSO8, LEAD FREE, PLASTIC, SOIC-8
厂商名称 Fairchild Fairchild Fairchild
零件包装代码 SOIC DIP SOIC
包装说明 SOP, DIP, SOP,
针数 8 8 8
Reach Compliance Code unknown unknown unknown
ECCN代码 EAR99 EAR99 EAR99
可调阈值 NO NO NO
模拟集成电路 - 其他类型 POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码 R-PDSO-G8 R-PDIP-T8 R-PDSO-G8
长度 4.9 mm 9.88 mm 4.9 mm
信道数量 1 1 1
功能数量 1 1 1
端子数量 8 8 8
最高工作温度 85 °C 85 °C 85 °C
最低工作温度 -35 °C -35 °C -35 °C
封装主体材料 PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
封装代码 SOP DIP SOP
封装形状 RECTANGULAR RECTANGULAR RECTANGULAR
封装形式 SMALL OUTLINE IN-LINE SMALL OUTLINE
认证状态 Not Qualified Not Qualified Not Qualified
座面最大高度 1.75 mm 5.33 mm 1.8 mm
最大供电电压 (Vsup) 30 V 30 V 15 V
最小供电电压 (Vsup) 24 V 24 V 4 V
标称供电电压 (Vsup) 26 V 26 V 5 V
表面贴装 YES NO YES
技术 BIPOLAR BIPOLAR BIPOLAR
温度等级 OTHER OTHER OTHER
端子形式 GULL WING THROUGH-HOLE GULL WING
端子节距 1.27 mm 2.54 mm 1.27 mm
端子位置 DUAL DUAL DUAL
宽度 3.9 mm 7.62 mm 3.95 mm
JESD-609代码 e3 e3 -
端子面层 MATTE TIN MATTE TIN -

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