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Safety /
Protection Circuits, Page 3
Safety / Protection: #-B
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Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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Electronic Circuit Breaker - This circuit uses the on-resistance of
the MOSFET as the current sensor. Reset it by removing the input power or the
load. The circuit draws no current unless tripped. Designed by Andrew R.
Morris (added 09/05) |
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Electronic Fuse Emulates Fast or Slow Blow Fuses - 11/09/00 EDN-Design
Ideas....PDF contains multiple circuits, scroll to find the one of interest /
The electronic-fuse circuit.… [Design Idea by John A Hasse, Colorado State
University, Fort Collins, CO] |
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Electronic Fuzing - National Semiconductor Application Note
05-Aug-1995 (app note added 8/02) |
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Emergency Stop - ….must register on this site.... [Published in
Elecktor July/August 2010] |
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Equip switchers with overCurrent protection - 06/24/99 EDN-Design
Ideas....(added 2/06] EDN is migrating links. This link is not verified.
Google the "title" EDN for new link. |
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External components provide true shutdown for boost converter -
16-Mar-06 Issue of EDN An additional MOSFET and resistor solves the
problem by opening the unwanted current path during shutdown.... [Design Idea by
Navid Mostafavi, Maxim Integrated Products Inc, Sunnyvale, CA; Edited by Brad
Thompson and Fran Granville] |
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Failed Power Light - turns on small low voltage lighting when mains power
disappears (added 6/06) |
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Failsafe Biasing Of Differential Buses - National Semiconductor Application
Note....[App Note] |
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Failsafe Biasing of LVDS Interfaces - National Semiconductor Application
Note....[App Note] |
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Fail-Safe Monitoring & Clock Frequency Switching using the PIC16f684 - Microchip
Application Note Published 16-Dec-03....[App Note] |
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Fast Electronic Fuse - A fast electronic fuse designed to operate on 230V AC
with an adjustable trip current. (added 10/05) |
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Fast IC Power Transistor with Thermal Protection - National Semiconductor
Application Note (app note added 2/06) |
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Fault-latch circuit protects switchers - 19-Feb-04 Issue of EDN Many
power-supply designers like to have a regulator latch off in the event of an overcurrent
situation or other fault condition. Yet, many PWM controllers do not internally support
this latch-off function. Most do, however, have a power-good output and an enable
function. The circuit in Figure 1 adds that latch-off capability at low cost in little
additional space.... [Design Idea by Craig Varga, National Semiconductor, Phoenix, AZ] |
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For want of circuit protection devices - 02/03/97 EDN-Design Feature A
variety of devices protects sensitive circuits against overvoltage or overcurrent
conditions, thereby preventing overheating, avalanche breakdown, and device burnouts.
[Design Feature by Bill Travis, Senior Technical Editor] |
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Fuse Monitor/Alarm - a simple way to see if a fuse has blown without removing it
from its holder (added 4/02) |
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Ground Fault Interrupter - Electronic Circuit design (added 02/05) |
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Ground Fault Interrupter (appnote) - National Semiconductor Application Note
MP1851 June 1992....[App Note] |
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High-side driver has fault protection - 5-Sep-02 Issue of EDN High-side
drivers find common use in driving grounded solenoid coils and other loads. Short-circuit
protection for such drivers is essential for avoiding damage from wiring faults and other
causes. Polymer fuses are generally too slow, and discrete current-limiting circuits are
large and cumbersome. The circuit in Figure 1 uses a small, low-dropout linear regulator
as a high-side switch and p.... [Design Idea by Carl Spearow, Tokyo Electron, Gilbert, AZ] |
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High-Voltage Circuit Breaker Protects to 26V - 09/11/98 EDN-Design Ideas....Wide
use of the Universal Serial Bus (USB] has led to a selection of overcurrent-protection
circuits for supply rails of 2.7 to 5.5V, but few products are available for voltages
higher than that range. The circuit breaker.… [Design Idea by [Ted Salazar, Maxim
Integrated Products, Sunnyvale, CA]] |
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House Security System - .... |
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IC Controlled Emergency Light with Charger - .... |
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Impedance transformer flags failed fuse - 17-Dec-04 Issue of EDN Figure
1depicts a circuit that detects the opening of a miniature circuit breaker or
high-rupture-capability fuse in a high-reliability telecommunications power supply. The
circuit generates an alarm when a failure changes the impedance of an electromagnetic
sensor. Traditional fault-detection circuits sense the voltage difference developed across
an open fuse, leakage current flowing through.... [Design Idea by Kevin Ackerley, Future
Electronics, Vancouver, BC, Canada] |
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Improved laser-diode clamp circuit protects against overvoltages - 29-May-08
Issue of EDN Adding a bipolar transistor to a JFET laser-diode clamp protects
high-current laser diodes.... [Design Idea by James Zannis, Baulne-en-Brie, France] |
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Inexpensive self-resetting circuit breaker requires few parts - 22-Jan-09 Issue
of EDN The circuit breaker pulses power through a pass transistor when the current
gets too high, thus protecting the part from excessive heat.... [Design Idea by Anthony H
Smith, Scitech, Bedfordshire, England] |
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Input protection scheme tops other approaches - 01/06/00 EDN-Design Ideas EDN is
migrating links. This link is not verified. Search the "title" + "EDN" for new link.
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Inrush limiter also provides short-circuit protection - 9-Jun-05 Issue of EDN
MOSFET keeps inrush currents due to capacitive loads under control.... [Design Idea by
Ryan Brownlee, Process Automation Division, Pepperl & Fuchs Inc, Twinsburg, OH; Edited by
Brad Thompson and Fran Granville] |
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Inverted regulator increases choice and reduces complexity - 15-Dec-09 Issue of
EDN A simple approach for any high side overcurrent-protection circuit references
the entire circuit to the high-side rail.... [Design Idea by David McCracken, Aptos, CA] |
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Isolated Driver Forms Solid-state Circuit Breaker - 03/02/98 EDN-Design IdeasThis
circuit allows standard TTL logic levels to safely drive a high-power dc load, circuit
provides also overcurrent circuit breaker functionality.…File contains many circuits,
please scroll to find this one.... [Design Idea by Bob Watson, Corley Manufacturing Co,
Chattanooga, TN] |
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Isolation Barrier Precisely Protects Transducer Signals - AN-246 Analog Devices
Application Notes....[App Note] Through the Judicious Use of Isolation Amplifiers that
Incorporate Transformer Coupling, You Can Design Circuits that Accurately Condition and
Amplify Low-Level Transducer Signals. |
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Safety / Protection:
#-B
C-D E-K
L-N O-R
S T-V |
