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Actually a bunch of waveforms will be helpful. Transformer pin 3 as well as the outputs to the diodes. It may be that you need one or more RC snubbers on windings.
While we are discussing diodes, I think that the attached re-arrangement can give you better cross regulation. Note that I...
Let's see your pcb layout. Layout is the under-appreciated "secret sauce" of power conversion design. Too much stray inductance in series with the schottky diode could cause problems. Note that your schematic shows D1 being connected directly to the IC output pin. I would highly recommend...
Oh, my Darlington! :) I like comparators for oscillators; at least for driving logic. An open collector (such as LM339) output can be followed by a CMOS inverter to get active pullup/pulldown. But this is a square wave output; not sinewave.
1) You are using a different simulator. That seems like 1 possible explanation.
2) My DC source does "start" after T=0. But my circuit appears to be more "symmetrical" and perhaps it did not inject any "net" perturbation.
Here is one that also works. I just threw this together quickly and cannot say much about it, other than it oscillates. But...note that it does not oscillate until V2 "kicks" it into oscillation. That is one aspect in which simulation differs from hardware: With hardware, there is always...
I am not an expert on oscillators but I have played around with them. One issue is that your RC network has the same impedance going in as coming out. You really want more of a one way signal flow but the loading of each stage greatly affects the phase shift. With all of your RC stages...
The loop dynamics are different from Continuous Conduction Mode, but each "ON" time charges the inductor up to an energy level determined by 0.5*L*(I^2). Switching Frequency*energy=Power. The output voltage will depend on both the peak current (determining energy) and the load. But...keep in...
In DCM you can run the duty cycle at a lower number. That is the main reason why I chose DCM. At 100 KHz you could have 5 uSec ON time, 500 nSec discharge time, and 4.5 uSec dead time (approximately, for example.)
Most of the comments above are correct. I would argue about needing a transformer, but
Volts*Amps output = (Volts*Amps input)*(efficiency = 80% to 95% if not too bad).
I do not know what is supplying your 5V input but above 25 - 30W I would certainly try to start with a higher voltage.
10:1...
That sounds like a good idea. But while you are at a solution that does not physically fit in the original case, why not go to C cells or D cells? I think that the $/(mA-hour) goes down as the size goes up. Of course I do not want to get ridiculous about this....;)
I am not the original poster, but I do not understand what you are describing. Lights that are ON during the day? The original question does not deal with lights. I suspect that I am not the only person who does not understand what you are proposing.
I have my own slug-o-cuter (my circuit design) in our garden. I bought a "Newpowa" 30W solar panel, a "Huine" charge controller, and a "Neptune" 7 A-H 12V sealed lead acid battery, all from Amazon. I suppose I could have designed the charge controller but buying one was much cheaper and...
You are probably correct in that the Pch design is more useful. I think that +5V USB is the most common sort of use case, and higher bias voltages will seldom be available. Of course one could add some sort of boost converter but that probably does not pay off unless we are dealing with a high...
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