Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches



Flyback Circuits
Fly Back Circuits:   #'s - K      
L - Z
 

Last Updated: November 30, 2017 10:30 AM


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

Circuits Designed by Dave Johnson, P.E. :

0.5v Negative SupplyAlthough not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps.  It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits,. . . Circuit by David A. Johnson P.E.-July, 2006

0.5v to 6v Voltage ConverterConventional silicon transistors just can't operate at voltages less than about 0.7v.  Old germanium transistors could be used, but those are hard to find these days and most are rather large in size.  Some new n-channel MOSFET devices with very . . . Hobby Circuit designed by David Johnson P.E.-May, 2007

Generate 0.5v Negative SupplyA while back someone needed a simple way to generate a negative 0.5v supply from a conventional transformer type AC to DC power supply.  The circuit below uses a couple schottky diodes and a filter capacitor to perform the feat . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2011

.4 watt 100% Radio Shack DC-DC Converter -  This DC-DC converter   ("inverter") needs nothing but unmodified Radio Shack parts.  You don't need to build or wind any coils or transformers __ Designed by Don Klipstein

0.5v Negative Supply -  Although not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps.  It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits,. . . Circuit by David A. Johnson P.E.-July, 2006

0.5v to 6v Voltage Converter -  Conventional silicon transistors just can't operate at voltages less than about 0.7v.  Old germanium transistors could be used, but those are hard to find these days and most are rather large in size.  Some new n-channel MOSFET devices with very . . . Hobby Circuit designed by David Johnson P.E.-May, 2007

10-15W watt 100% Radio Shack DC-DC Converter -  This DC-DC converter   ("inverter") needs nothing but unmodified Radio Shack parts.  You don't need to build or wind any coils or transformers.  This is a cheap-and-dirty experimenter's circuit.  I tested this and it worked for me, but I disclaim all warranties! __ Designed by Don Klipstein

12V-24Vin to 5VoutAT1.4A Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3575 is a monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation.  The part senses the isolated output voltage directly from the primary side flyback waveform.  A 2.5A, 60V NPN power switch is integrated along with all control___ Linear Technology/Analog Devices App Note, Jan 27th 2011

12V-24Vin to 5VoutAT350mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3574 is a monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation.  The part senses the isolated output voltage directly from the primary side flyback waveform.  A 0.65A, 60V NPN power switch is integrated along with all control___ Linear Technology/Analog Devices App Note, Jan 27th 2011

12V-24Vin to Four Output 12VAT120mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3575 is a monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation.  The part senses the isolated output voltage directly from the primary side flyback waveform.  A 2.5A, 60V NPN power switch is integrated along with all control___ Linear Technology/Analog Devices App Note, Jan 27th 2011

12W AC-DC Flyback converter -  Fully assembled and tested power supply with DC containing all design documentation Features: Universal AC line input, 0-1A IoutAT12V, 84% efficiency at high line, Short Circuit protection, Over Voltage protection __

13V-30Vin to +/-5VAT500mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3575 is a monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation.  The part senses the isolated output voltage directly from the primary side flyback waveform.  A 2.5A, 60V NPN power switch is integrated along with all control___ Linear Technology/Analog Devices App Note, Jan 27th 2011

2 Phases to Cut Current & Improve EMI -  11/12/09 EDN-Design Ideas In DC/DC-converter applications in which the input voltage may be lower or higher than the output voltage, you can use either a flyback converter or a SEPIC (single-ended-primary-inductor converter).  SEPICs offer lower input-curre__ Circuit Design by Goran Perica, Linear Technology App Note, Milpitas, CA

24Vin to 1.2Vout AT 15A using Inductor DCR Sensing to Minimize Solution Size & Cost -  This circuit shows a typical application of the LTC3613, configured for DCR sensing in a high step-down solution, 24V to 1.2V, and synchronized to a 350kHz external clock.  ___ Linear Technology/Analog Devices App Note, Jun 29th 2012

24Vin to 5VoutAT0.7A Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3573 is a monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation.  The part senses the isolated output voltage directly from the primary-side flyback waveform.  A 1.25A, 60V NPN power switch is integrated along with all control___ Linear Technology/Analog Devices App Note, Jan 27th 2011

36V-72Vin to 12VoutAT2A Output, Isolated Telecom Supply (No Opto or Third Winding) -  The LT3748 is a switching regulator controller specifically designed for the isolated flyback topology and capable of high power.  It drives a low side external N-channel power MOSFET from an internally regulated 7V supply.  No third winding or opto-isolator is required for regulation as the part senses the isolated output voltage___ Linear Technology/Analog Devices App Note, Jan 27th 2011

48Vin to +/-15VoutAT100mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3512 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform.  The device integrates a 420mA, 150V power switch, high voltage circuitry, ___ Linear Technology/Analog Devices App Note, Apr 22, 2011

48Vin to +/-15VoutAT50mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3511 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform.  The device integrates a 240mA, 150V power switch, high voltage circuitry, ___ Linear Technology/Analog Devices App Note, Jan 27th 2011

48Vin to 12VoutAT200mA Monolithic Isolated Flyback Controller (No Opto or Third Winding) -  The LT3512 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform.  The device integrates a 420mA, 150V power switch, high voltage circuitry, ___ Linear Technology/Analog Devices App Note, Apr 22, 2011

48Vin to 5VoutAT0.3A Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3511 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform.  The device integrates a 240mA, 150V power switch, high voltage circuitry, ___ Linear Technology/Analog Devices App Note, Jan 27th 2011

555 Timer-Based Flyback Transformer Driver -  My 24kV high voltage "Jacob's Ladder" from DIY flyback transformer driver using 555 timer.   __ Designed by simon leorick

5V, 2A Output from Automotive Input with Continuous Operation from 6V to 45V -  The LT3748 is a switching regulator controller specifically designed for the isolated flyback topology and capable of high power.  It drives a low side external N-channel power MOSFET from an internally regulated 7V supply.  No third winding or opto-isolator is required for regulation as the part senses the isolated output voltage___ Linear Technology/Analog Devices App Note, Jan 27th 2011

5Vin to +/-12VoutAT40mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3574 is a monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation.  The part senses the isolated output voltage directly from the primary side flyback waveform.  A 0.65A, 60V NPN power switch is integrated along with all control___ Linear Technology/Analog Devices App Note, Jan 27th 2011

60W AC-DC Flyback Converter -  Universal AC line input Fully assembled and tested power supply with DC containing all design documentation Features: 0-4A IoutAT15V, 87% efficiency at high line, Short Circuit protection, Over Voltage protection __

90W AC-DC Flyback Converter -  Fully assembled and tested power supply with DC containing all design documentation Features: Universal AC line input, 0-6A IoutAT15V, 83% efficiency at high line, Short Circuit protection, Over Voltage protection __

9V-30Vin to +/-5VoutAT350mA Monolithic Isolated Flyback Converter (No Opto or Third Winding) -  The LT3573 is a monolithic switching regulator specifically designed for the isolated flyback topology.  No third winding or opto-isolator is required for regulation.  The part senses the isolated output voltage directly from the primary-side flyback waveform.  A 1.25A, 60V NPN power switch is integrated along with all control___ Linear Technology/Analog Devices App Note, Jan 27th 2011

A 5 volt to +24V flyback output DC to DC Converter -  A simple regulated +24 volts power supply for low current applications.  The circuit was built on a small piece of phenolic board about 2 cm x 5.5 cm.  It will be placed piggyback on a larger assembly.  I needed a few milliamps at +25 __ Designed by Richard Cappels

A doozy requiring some parts you can't get at the 'Shack. -  You can make a doozy of a xenon strobe using the 12 volt DC in, DC output mercury lamp ballast here at http://www.  donklipstein.  com/ebdc12.  html.  You may run into a problem with the flashtube arcing continuously after a flash.  If you use an open-collector comparator such as a 339 in the overvoltage sensing section of this circuit, you can wired-AND the comparator output with some sort of scheme to disable the circuit for a few to a few tens of milliseconds after a flash   (by "pulling down" Pin 5 of the 555).   __ Designed by Don Klipstein

An Output Adjustable Flyback Converter -  A high voltage step-up DC power supply using adjustable flyback conversion.   __ Designed by Simon Oh

Auxiliary 12V Flyback SMPS -  Finally a use for those extra ferrites! __

Design a Simple, Efficient & Reliable Forward Converter -  Due to the high cost and inflexibility of isolated DC/DC converter modules, many designers are choosing to implement a discrete design that is better matched to their application.  In particular, the forward converter with active clamp reset has been widely used in custom supplies because of its excellent efficiency and reduced___ Linear Technology/Analog Devices App Note, Kurk Mathews Senior Applications Engineer-Power Products Jun 14th 2012

Doozy requiring some parts you can't get at the 'Shack -  You can make a doozy of a xenon strobe using the 12 volt DC in,  __ Designed by Don Klipstein

Flyback Controller Improves Cross Regulation for Multiple Output Applications -  DN344 Design Notes___ Linear Technology/Analog Devices

Flyback Converters for Dummies -  In the NIXIE clocks that I have built, I did not want to have the big and ugly mains transformer in the actual clock itself.  Instead I use an AC adapter that fits into the mains wall plug.  This means that I have to use some sort of an up-converter to generate the 180V anode supply for the NIXIEs __

Flyback provides isolated power conversion -  01/07/99 EDN-Design Ideas NOTE :  Mulitple Ideas, Scroll to find this one.  A common requirement in telecommunications systems is to convert an unregulated 48V line to an isolated, accurate dc supply voltage.  The circuit in Figure 1 provIdeas a 5V, 15W output.  The circuit uses a UCC3809 primary-side controller, which can also control other single-ended converters.  The topology uses peak-current-mode control with a fixed-frequency oscillator.  The design is cost-efficient Page includes several designs.__ Circuit Design by Philip Cooke, Unitrode Corp, Merrimack, NH

Flyback switcher works down to 1.1V, flashes HBLEDs -  EDN-Design Ideas 11/03/2014     Check out this DI if you need voltage step-up from a single cell.   This Design Idea shows a way to drive low-power electronic circuits using a single 1.5V cell.  The design is based on a free-running oscillator that drives a flyback transformer to  generate a controllable higher voltage.  It can be used to power analog circuitry, microcontrollers, and any other light loads.__ Circuit Design by R O Ocaya

Flyback Transformer Driver -  This is an efficient flyback driver for modern cylindrical rectified television flybacks.  Many sites doesn't provide circuits driving these transformers, they simply say that they are bad  __ Designed by Jonathan Filippi

Flyback Transformer Driver -  This is by far the best project for someone who is already familiar with High Voltage, but wants to take their experiments to the next level: It requires very little previous experience and skills with soldering and identifying components, and there are virtually no adjustments to be made.  The danger is minimal, as fly back transformers are intrinsically low power devices, not capable of outputting lethal currents (due to the hair-thin secondary windings), and yet it will give a careless experimenter a nasty RF burn if he accidentally touches the HV wire (nothing beats learning from your mistakes).  If you have never experimented with HV before though, I recommend you start off with an electrostatic project.  This circuit is not a toy! __ Contact: Sam Barros

Generate 0.5v Negative Supply -  A while back someone needed a simple way to generate a negative 0.5v supply from a conventional transformer type AC to DC power supply.  The circuit below uses a couple schottky diodes and a filter capacitor to perform the feat . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2011

High Efficiency Isolated Flyback Supply Without Optoisolator -  DN1011 Design Notes___ Linear Technology/Analog Devices

How to Design a Simple Circuit Isolated Flyback Converter-LT3573 -  Isolated power supplies are needed in a wide variety of applications.  Galvanic isolation is achieved by isolating two or more circuits using a transformer or optocoupler, and is desirable for many reasons: safety, noise immunity, circuit protection, etc.  Traditionally, isolated power supplies use an optocoupler to transfer___ Linear Technology/Analog Devices App Note, Mike Negrete-Design Engineer-Power Products Mar 15th 2009

HV flyback converter improves efficiency -  11/05/13  EDN-Design Ideas This Design Idea significantly improves conversion efficiency of externally driven flyback converter-based capacitor charging units intended for flash-lamp-pumped, pulsed solid-state laser sources.  In a flash-pumped pulsed solid state laser source, an energy storage capacitor is charged to a high voltage, dependant upon the amount of energy it is intended to deliver to the flash lamp when made to discharge.  __ Circuit Design by anil maini , Varsha Agrawal & Nakul Maini

Isolated Flyback Controller with PFC Controls Voltage or Current -  Linear Technology’s LT®3798 isolated controller with active power factor correction (PFC) is specifically designed for regulating bus voltages or driving constant current applications over a wide input range of 10V to 480V.  It is ideal for constant voltage/current applications requiring 4W to over 100W power.  The LT3798’s___ Linear Technology/Analog Devices App Note, Jesus Rosales-Applications Engineer Oct 27th 2011

Isolated Flyback Converter Regulates Without an Optocoupler -  DN260 Design Notes___ Linear Technology/Analog Devices


Fly Back Circuits:    #'s - K       L - Z


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - November, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.