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Boost / Step Up Power Supplies, Page 8
Boost,    Buck,    Buck-Boost,    Switchmode
Power Supplies -- Main Page           Converters -- Main Page
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Last Updated on:
Friday, June 04, 2021 06:51 AM


Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:
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]
 

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]

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)
 
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)
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)
 
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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