The basic buck boost topology produces an inverted output, but SEPIC (Single-Ended Primary-Inductor Converter) solves that problem maintaining polarity through the system. The output voltage can be either higher or lower than the input.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Isolation? Is there are not ??
nice upload, did you build it ?
This can be used to charge a laptop with ur car battery. It will keep the voltage stable and 25watt can easily charge a normal laptop battery within 3hrs.
Hi. Could you make a video of how to use buck boost converter at dc 12v fan?
Recently purchased a buck-boost that has 3 pots. Don't know what they're for yet and don't what the specs are either.
Please consider an update video of one of these converters.
Cheers
I have a quick question. Would a higher amperage boost buck converter possibly work to regulate voltage coming from a small alternator? This particular alternator (on a small motorcycle that charges a 6v battery) is around 6 volts at engine idle and 20 volts high engine rpm. I would like to regulate it at 12 volts consistently and use a 12v battery. I don't think I would need to pull more than a few amps to power some led lights and charge the battery. Would a boost buck converter work on something like this with a range of 6v to 20v input and 12v output.
Yep, curious about what type of load they can support in the boost mode. 3A in and maybe only 1A out put ? Just guessing.
I don't understand.. Why when I hook up a solar cell 10v, when when the input voltage from the solar cell changes (sun, clouds, shade, etc..) why does the output voltage change? I thought the whole idea of these sepic converters was to have a constant voltage output no matter the input voltage? If this doesn't do it, then what will do it? I need constant voltage, I don't care about constant current. I have a CC & CV Converter already. but I don't know how to use it. think I need a load on the other end to use it.
Hi Julian, could you do a more indepth review of this module with various loads attached. I've been experimenting with various input voltages from battery sources. Using a standard 9V PP3 battery as the input voltage had some strange voltage and current fluctuations, even more so as the battery voltage reached around 7.5V and current draw unloaded was over 300mA! The module I was testing is based on the XL6019 DC-DC Constant Voltage Power Supply from ebay.
I'm looking to power an Xbox from a 12v system without the use of an inverter. (It seems wildly inefficient, efficiency is important since this is a solar powered system). Since the batteries are on charge during sunlight the voltage source ranges from 12.2 – 14.4, once a month reaching to 14.6 for an equalising charge.
The Xbox is power hungry – and operates at 220watts in full flow. I've looked at the range of power options available and am confused. Which do you think would be best. A regular buck/boost or a sepic converter?
I am struggling to find a ps that can handle the amperage required.
it sells for $1.45 in USA
why did you not load it? you are the third one to"demonstrate" thsi buck/boost without loading.
So, I connected the output from a solar panel (5V) to this SEPIC converter to provide a steady step down voltage to 3V (to charge 2x NiMh batteries). Another set up with 1.5V (1x NiMH)
The arrangement works as long as there is direct sunlight. As soon as a cloud cuts out the direct light briefly, the panel is unable to support the load (fair enough) and it switches off. But after the cloud passes and direct sunlight is available again, the SEPIC converter does not turn on again. It would be nice if it did (and harvest the maximum solar power possible)
Hi Julian, what that jumper is for?