3 ms·
Not really true. Nearly all of new (i.e. Post 2000) switch-mode power supplies accept a wide range of voltage (100V-250V), and a wide range of frequency (even
by Faaak 7y ago
Not really true.
Nearly all of new (i.e. Post 2000) switch-mode power supplies accept a wide range of voltage (100V-250V), and a wide range of frequency (even 0Hz, i.e. DC current would work).
- lstodd 7y agoFrequency is irrelevant. They would run on DC or 400Hz or 10KHz just fine - they all rectify the supplied current first. Frequency is only limited by the bridge diodes. And 100V is written on them only because there are no countries with lower than 100V standard. I'll bet a crap chinese usb charger will work off 48VDC just fine.
- jdsully 7y agoThe ripple filters will be tuned for a specific frequency.
- coryrc 7y agoConverters in universal power supplies tend to fail around 75-85Vdc even at low loads and usually can't deliver full current at 90Vac, in my experience (was using universal power supplies in electric cars; okay for 96V+ cars, but unusuable for 72V and below). 48Vdc is not a reasonable expectation, unfortunately.