Electronics > Beginners
Boost converter vs Buck Converter?
ElectricPower:
Sorry if this question is really stupid, but I wonder why you should choose a "Boost converter" rather than a "Buck Converter".
What are the advantages and disadvantages and what should you choose if you live on a budget and can only buy one of the parts?
wraper:
Boost converter increases voltage. Buck converter decreases. Choose depending on what you need to do.
T3sl4co1l:
Boost boosts the voltage (Vout > Vin), buck bucks the voltage (Vout < Vin). Output is always common-ground and same sign as input.
What parts would you only be able to buy one of? Complete modules are a few bucks (not that they're any good).
If you need a more universal option, perhaps a SEPIC converter would do (Vin <=> Vout)? These are likely to be more expensive though.
Things get very unwieldy (component cost, efficiency) for wide ranges of input or output, hence why converters are usually made in many models to suit each range. You wouldn't use a 48V or 3.3V converter at 12V (indeed, they might be physically incompatible).
Edit: which, well, there you go, they do indeed make them, as crusty as ever but not much more expensive as it turns out: https://www.ebay.com/itm/92-Efficiency-LM2577-SEPIC-Adjustable-3-35V-To-1-2-30V-Charging-Power-Regulator/312598343651?epid=5025061872&hash=item48c8502fe3:g:c-AAAOSwUUhc0EFS
Tim
ElectricPower:
Ok, i know the main difference between them. Buck is down and boost is up. Easy peacy so far...
But let's say i need som random power in my workshop from time to time between 0-30 volt and 0-10 amps to give the right amount of power for my projects. When do i know to choose right between a buck og boost converter?
Both converter types works, but why should i choose the one over the other?
BravoV:
So called "buck-boost" topology also exist, it has both.
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