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Flyback Circuits, Page 1
Fly Back Circuits:   #'s - D     E -
L      N - Z
Last Updated on: Thursday, October 30, 2014 09:22 AM


Circuits Designed by Dave Johnson, P.E. :
  • 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, which need to have a true zero volts output.  (added 12/04)


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

.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….....
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, which need to have a true zero volts output.  (added 12/04) …. [Designed by David A. Johnson]
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.….....
12W AC-DC Flyback converter -  Fully assembled and tested power supply with DC containing all design documentation Features: Universal AC line input, 0-1A Iout @ 12V, 84% efficiency at high line, Short Circuit protection, Over Voltage protection  (added 3/05)
556 Timer-Based Flyback Transformer Driver -  My 24kV high voltage "Jacob's Ladder" from DIY flyback transformer driver using 555 timer….(electronic circuit added 02/09)
60w Ac-DC Flyback Converter -  Universal AC line input Fully assembled and tested power supply with DC containing all design documentation Features: 0-4A Iout @ 15V, 87% efficiency at high line, Short Circuit protection, Over Voltage protection  (added 6/06)
 
90w Ac-DC Flyback Converter -  Fully assembled and tested power supply with DC containing all design documentation Features: Universal AC line input, 0-6A Iout @ 15V, 83% efficiency at high line, Short Circuit protection, Over Voltage protection  (added 6/06)
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,….....
An Output Adjustable Flyback Converter -  A high voltage step-up DC power supply using adjustable flyback conversion…. [Simon Oh, designer]
AN-4137/ Design Guidelines for Off-line Flyback Converters using FPS -  Fairchild Application Notes / (app note added 6/06)
AN-4137SC/ Chinese Translation: Design Guidelines for Off-line Flyback Converters using FPS -  Fairchild Application Notes / (app note added 6/06)
AN-4140/ Transformer Design Consideration for off-line Flyback Converters Using Fairchild Power Switch FPStm -  Fairchild Application Notes / (app note added 6/06)
AN-4146/ Design Guidelines for Quasi-Resonant Converters Using FSCQ-series Fairchild Power Switch FPStm -  Fairchild Application Notes / (app note added 6/06)
AN-4147/ Design Guidelines for RCD Snubber of Flyback -  Fairchild Application Notes / (app note added 6/06)
AN-777: LM2577 Three Output, Isolated Flyback Regulator -  National Semiconductor Application Note  (app note added 2/06)
AN-H13: HV91 Series: Designing High-Performance Flyback -  Supertex Semiconductors  (app note added 2/06)
AN-H24: Expected Voltages & Waveforms -  Supertex Semiconductors (app note added 6/06)
Chinese Translation: Design Guidelines for Off-line Flyback Converters using FPS/ AN-4137SC -  Fairchild Application Notes / (app note added 6/06)
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,….....

Fly Back Circuits:   #'s - D     E - L      N - Z


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