Power circuit
AssigneeMitsumi Electric Co., Ltd.
InventorsJunji Takeshita, Yasuhiro Tokumaru, Kouichirou Sakamoto
Life of this patent
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Abstract
A power circuit is disclosed which is connected to a power source supplying different currents. The power circuit supplying driving power from the power source to a load includes a switching unit configured to switch the driving power supplied to the load in response to an external switching signal.
Claims5
A power circuit connected to a single power source having different capabilities of supplying current, said power circuit supplying driving power from the single power source to a load, comprising a switching unit configured to adjust levels of output current of the single power source supplied to the load in response to one external switching signal on only a single external control line, and wherein:
- the power source is a power line of a USB interface, and wherein the switching unit switches a driving current in response to whether the USB interface is set to a first power mode or to a second power mode, wherein in the second power mode a driving current is supplied larger than that in the first power mode.
Dependencies are inferred from the claim text.