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Links to electronic circuits, electronic schematics and designs
for engineers, hobbyists, students & inventors:
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Single transistor provides short-circuit protection -
16-Oct-03 Issue of EDN In certain dc/dc-converter applications,
on-chip, cycle-by-cycle current limit may be insufficient protection
to prevent a failure during a short circuit. A nonsynchronous boost
converter provides a[Design Idea by Keith Szolusha, Linear
Technology Corp, Milpitas, CA] |
Step
Up/Step Down Converter Takes 2 to 16V Inputs - 07/16/98 EDN-Design
Ideas....The circuit in Figure 1 is a low-cost step-up/step-down
dc/dc converter. By definition, its input can range above and below
the regulated voltage. The circuit includes a simple switchmode boost
converter (IC1] that contains a comparator normally...This file
contains several circuits, scoll to find this one. [Design Idea by
Lucian Brodogna and Luca Vasalli. Maximin Integrated Products,
Milan Italy] |
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Step-up supply charges battery while serving load - 06/08/95 EDN-Design
Ideas....The circuit in Fig 1 supports portable applications in which a
microprocessor controls battery charging. Step-up switching regulator IC1 boosts
VIN (5V]to supply a combination of charging and load current. (Note that the 5V
source must have short-circuit protection.]IC2 is a high-side current-sense
Amplifier that monitors charging current. [Design Idea by Dana Davis, Maxim
Integrated Products, Sunnyvale, CA] |
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Supercapacitor boosts current from small battery - 2-Sep-04 Issue of
EDN Some battery-powered devices require large amounts of current in a
short period of time but spend most of the time in sleep (power-down] mode. The
momentary large-load current demands large batteries to meet the time
requirement, even though the average current consumption is low. For instance, a
system operates for 1. [Design Idea by Yongping Xia, Navcom Technology,
Torrance, CA] |
Supply derives 5 and 3.3V from USB port - 20-Dec-01 Issue of EDN
The circuit in Figure 1 derives its power from a USB port and produces 5 and
3.3V supply rails for portable devices, such as digital cameras, MP3 players,
and PDAs. The circuit allows the port to maintain communications while, for
example, charging a lithium-ion battery. IC2 boosts the battery voltage, VBATT,
to 5V, and IC3 buck-regulates that 5V output down to 3. [Design Idea by Chad
Olson, Maxim Integrated Products, Sunnyvale, CA] |
Tapped inductor, boost regulator deliver high voltage - 20-Jul-06
Issue of EDN Obtain 100V dc from a 3V source. [Design Idea by David Ng
and Adam Huff, Linear Technology Corp, Milpitas, CA; Edited by Brad Thompson and
Fran Granville] |
The Use of Zetex E-Line Transistors in DC-DC Converters: An Introduction to the
E-Line Package & Typical Applications - Zetec Semiconductors
Applications Notes A basic guide to the DC-DC Converter requirement and concept,
including an introduction to the Zetex enhanced TO92 the E-Line package, and
some suggested applications where these components offer advantages. (app
note added 7/06) |
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Three parts provide tenfold increase in switcher current - 22-Aug-02
Issue of EDN Industrial-control circuits often derive their power from
widely varying sources that can exceed the 40V maximum rating of popular
switching ICs. This Design Idea presents a simple, flexible, and
inexpensive buck switcher that converts an input voltage as high as 60V to 5V at
several Amps. The circuit is unique in that it boosts current with almost no
compromise in performance, size, or cost. [Design Idea by Wayne Rewinkel,
National Semiconductor, Sunnyvale, CA] |
Three-Band Equalizer - Using a single op-amp this easy to make
equalizer offers three ranges, low frequency, mid frequency, and high. With
component values shown there is approximately +/-20dB of boost or cut at
frequencies of 50Hz, 1kHz and 10kHz. Supply voltage may be anything from 6 to 30
Volts. Maximum boost 20dB is only realized with maximum supply voltage. (added
4/05) |
Tiny & Efficient Boost Converter Generates 5V at 3A from 3.3V Bus -
DN280 Design Notes (Linear Technology) (App Note added 1/06) |
Tiny Highly Flexible Dual Boost/Inverter Tracks Supplies - DN357
Design Notes (Linear Technology) (App Note added 1/06) |
Tiny microcontroller hosts dual dc/dc boost converters - 15-May-08
Issue of EDN An Atmel AVR microcontroller can serve as the PWM controller
for two dc/dc converters that provide high voltages from a two-cell supply.
[Design Idea by Dhananjay V Gadre, Netaji Subhas Institute of Technology, New
Delhi, India] |
Unique IC Buffer Enhances Op Amp Designs Tames Fast Amplifiers - AN16
Linear TechnologyThis note describes some of the unique IC design techniques
incorporated into a fast, monolithic power buffer, the LT1010. Also, some
application ideas are described such as capacitive load driving, boosting fast
op Amp output current and power supply circuits. |
Universal PSU - Circuit designed by Volker Jeschkeit. A
Universal Power supply based on the L200 regulator, which includes an outboard
pass transistor to boost output currents up to 4 Amps. (added 7/06)
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Universal PWM Driver - PWM drivers are used in analysing, testing,
installing and powering all kinds of electronic and electrical devices. We have
published a few designs in Elektor over the years: here we present a ‘de luxe’
version….must register on this site. [Published in Elecktor July/August 2010] |
Use a microcontroller to design a boost converter - 4-Mar-04 Issue of
EDN Boost converters, like other switchers, have traditionally received
their control signals from a dedicated circuit. However, a recent trend is to
integrate simple switching-power-supply building blocks into generic devices,
such as microcontrollers. An excellent example of this concept is a
microcontroller that combines digital and analog circuitry and makes it easier
to build simple power supp. [Design Idea by Ross Fosler, Microchip
Technology, Chandler, AZ] |
Use of Zetex E-Line Transistors in DC-DC Converters: an Introduction to the
E-Line Package & Typical Applications - Zetec Semiconductors
Applications Notes A basic guide to the DC-DC Converter requirement and concept,
including an introduction to the Zetex enhanced TO92 the E-Line package, and
some suggested applications where these components offer advantages. (app
note added 7/06) |
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Voltage Booster (Very Simple) - Uses a LT1372 and only a
Few partsBut can handle 1.5 Amps Input Current. Input as low as 3
VoltsOutput may be as high as 35 Volts....(design added 12/08) |
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