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Step up boost converter power handling
Step up boost converter power handling
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Old 11th July 2020, 11:59 PM   #11
ghettoblasterfanatic is offline ghettoblasterfanatic  United States
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Originally Posted by duncan2 View Post
While it says =10 amp output it qualifies that by putting in brackets (MAX )

it doesn't say it keeps that current at that level over the full voltage range ,I have come across this type of advertising of electrical products before where the highest output voltage doesn't equate to the full current output .

Its too simplified ,look at this converter to show the difference --it states=100% full rated power and stable output voltage notice the difference in wording --no (MAX ) in brackets.-

12V TO 24V 20A DC DC 500W Step Up Boost DC-DC Converter Power Voltage Regulator for Sale - BlackBerryForums.com
So if I try to run 10 amps through it, it'll likely burn out?
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Old 12th July 2020, 12:35 AM   #12
trobbins is offline trobbins  Australia
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The more power output you want from the converter, the more effort you have to make to keep the power fets cool. Unless you can get confident about heat transfer and temperature rises and fet die temperature, I would seriously derate your expectations on any power output rating, and even then you have to do your due diligence on cooling the module or it may fail without you realising what is happening.
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Old 13th July 2020, 07:36 PM   #13
ghettoblasterfanatic is offline ghettoblasterfanatic  United States
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That makes sense, maybe I'll try it for a few days at higher volumes and see how it does. They are pretty inexpensive and I have spares so I can experiment a bit.
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Old 13th July 2020, 08:37 PM   #14
Elvee is offline Elvee  Belgium
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The problem with converters is not the average power output: even a "200W rms" (sic, in fact probably 200W mean power rigorously speaking) amplifier that should draw 300W under pure sine, max conditions will generally remain below 1/5th of that with music, unless you push the volume into heavy clipping with a heavily compressed program.
The real issue is that each rail will have to provide up to four times the average current for peaks, and that applies to regular music.
This is why audio-oriented converters exist: they are capable of providing the high transient currents required without collapsing or going into protection on peaks.
In principle, a large reservoir capacitor could provide for the transients, but normal converters have problems starting on large caps.

Another option is to use a vastly oversized converter, which is more or less your case
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