What is the maximum output current?
The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it’s rated output current unless there is a fault, such as short circuit at the load.
What limits battery current?
It is a function of the chemistry and battery capacity. Generally the maximum output current is limited either by the chemistry (which limits the speed of the oxydation/reduction reactions inside the battery), or by thermal dissipation considerations (the battery has some internal resistance).
What’s the maximum current a power supply can draw?
All supplies have some maximum current they can provide and still stick to the remaining specs. For a “12 volt 1 amp” supply, that means all is fine as long as you don’t try to draw more than the rated 1 A. There are various things a supply can do if you try to exceed the 1 A rating.
What are the limitations of an AC / DC power supply?
Another limitation of linear AC/DC power supplies is the high-power voltage regulation. A linear AC/DC power supply uses linear regulators to maintain a constant voltage at the output. These linear regulators dissipate any extra energy in the form of heat. For low power, does not pose much of a problem.
How is the output voltage of a DC power supply determined?
This is fixed, so instead of making a fixed output voltage their output is mostly proportional to the input AC voltage. For example, such a “12 V” DC supply might make 12 V at 110 VAC in, but then would make over 13 V at 120 VAC in.
Which is the main job of an AC / DC power supply?
The main job of an AC/DC power supply is to transform the alternating current (AC) into a stable direct current (DC) voltage, which can then be used to power different electrical devices. Alternating current is used to transport electric power all across the electric grid, from generators to end users.