Timeline for how to transform 120V AC to 5V DC 5A load using flyback transformer circuit? Setting frequency - low cost, low footprint - change load capacity
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
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| May 23, 2020 at 23:03 | comment | added | user4574 | The 12.5X figure is for "all other things being equal". The energy (E) stored in a transformer core is proportional to the square of the flux and the core volume. Each core material has some maximum flux at which it saturates and can no longer store any more energy. The maximum output wattage you can get out of the transformer, switching at frequency f, is going to be E * f. So for a given frequency and core material you must increase the size proportional to the output wattage. You can always just use another core material or frequency. The proportional size is just a rough guideline. | |
| May 23, 2020 at 20:06 | vote | accept | kennethmods | ||
| May 23, 2020 at 19:45 | comment | added | kennethmods | the transformer is going to be 12.5 X larger than with a 500mA load? i don't know. I have two chargers, one 400mA, one 4 amp, and they both fit in the palm of my hand. How can a transformer be kept very small with high voltage? | |
| May 23, 2020 at 19:10 | history | answered | user4574 | CC BY-SA 4.0 |