RV4145AMU Fairchild Semiconductor, RV4145AMU Datasheet

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RV4145AMU

Manufacturer Part Number
RV4145AMU
Description
Low Power Ground Fault Interrupter
Manufacturer
Fairchild Semiconductor
Datasheet
Features
• No potentiomenter required
• Direct interface to SCR
• Supply voltage derived from AC line – 26V shunt
• Adjustable sensitivity
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.
Block Diagram
RV4145A
Low Power Ground Fault Interrupter
Ground
(+13V)
+Input
V
V
REF
FB
RV4145A
10K
10K
R2
R1
6.5V
4.7K
R3
6.5V
6.5V
• Grounded neutral fault detection
• Meets U.L. 943 standards
• 450µA quiescent current
• Ideal for 120V or 220V systems
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.
65-4145A-01
6.5V
Op Amp Output
+V
(+26V)
SCR Trigger
S
www.fairchildsemi.com
REV. 1.0.3 3/6/02

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RV4145AMU Summary of contents

Page 1

RV4145A Low Power Ground Fault Interrupter Features • No potentiomenter required • Direct interface to SCR • Supply voltage derived from AC line – 26V shunt • Adjustable sensitivity Description The RV4145A is a low power controller for AC outlet ...

Page 2

PRODUCT SPECIFICATION Pin Assignments 8-Pin PDIP 8-Pin SOIC +Input REF GND 4 5 Absolute Maximum Ratings (beyond which the device may be damaged) 1 Parameter Supply Current Internal Power Dissipation Storage ...

Page 3

RV4145A Electrical Characteristics Parameters Detector Reference Voltage Shunt Regulator Zener Voltage (+ Reference Voltage (V ) REF Quiescent Current ( Operational Amplifier Offset Voltage +Output Voltage Swing –Output Voltage Swing +Output Source Current –Output Source Current ...

Page 4

PRODUCT SPECIFICATION Principles of Operation The 26V shunt regulator voltage generated by the string of zener diodes is divided into three reference voltages: 3 and 1 1/2VS and is used as ...

Page 5

RV4145A R TEST 15K Sense Transformer Mov 1000:1 Hot Line Neutral Value depends on transformer characteristics. Figure 1. GFI Application Circuit (Three-Wire Outlet) REV. 1.0.3 3/6/02 Press To Test Ground Neutral Transformer R SENSE 1M * ...

Page 6

PRODUCT SPECIFICATION R TEST 15K Sense Transformer Mov 1000:1 Hot Line Neutral Value depends on transformer characteristics. Figure 2. GFI Application Circuit (Two-Wire Outlet) 6 Press To Test R SENSE 1M * RV4145 V Op Amp ...

Page 7

RV4145A Schematic Diagram REV. 1.0.3 3/6/02 PRODUCT SPECIFICATION 7 ...

Page 8

PRODUCT SPECIFICATION Mechanical Dimensions 8-Lead Plastic DIP Package Inches Millimeters Symbol Min. Max. Min. Max. A — .210 — 5.33 A1 .015 — .38 A2 .115 .195 2.93 4.95 B .014 .022 .36 B1 .045 .070 1.14 1.78 C .008 ...

Page 9

RV4145A Mechanical Dimensions 8-Lead SOIC Package Inches Millimeters Symbol Min. Max. Min. Max. A .053 .069 1.35 1.75 A1 .004 .010 0.10 0.25 B .013 0.33 .020 0.51 C .008 .010 0.20 0.25 D .189 .197 4.80 5.00 E .150 ...

Page 10

PRODUCT SPECIFICATION Mechanical Dimensions 8-Lead MSOP Package 0.118 - 0.004 [3 ± 0.1] 8 0.193 0.004 [4.9 0.1] PIN 1 IDENT 1 0.030 - 0.037 [0.78 - 0.94] –C– 0.002 [0.05] C 0.012 0.002 [0.3 0.05] 0.002 - 0.006 TYP ...

Page 11

... Package RV4145AN 8-Lead Plastic DIP RV4145AM 8-Lead Plastic SOIC RV4145AMU 8-Lead Plastic MSOP DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...

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