DC/DC power supply circuit with a bypass circuit
AssigneeFujitsu Limited
InventorsMitsuo Saeki, Kouichi Matsuda
Life of this patent
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Abstract
A power supply circuit includes: an input terminal; a DC voltage converter that converts a DC input voltage supplied to the input terminal into a DC output voltage; an output terminal that outputs the DC output voltage; a bypass circuit provided to the DC voltage converter between the input terminal and the output terminal; and a monitor control unit that monitors whether or not the DC input voltage satisfies a predetermined condition to be processed in the DC voltage converter, so as to connect the input terminal to the output terminal via the bypass circuit if the DC input voltage does not satisfy the predetermined condition.
Claims6
A power supply circuit, comprising:
- an input terminal;
- a DC voltage converter converting a DC input voltage supplied to the input terminal into a DC output voltage;
- an output terminal outputting the DC output voltage;
- a bypass circuit bypassing the DC voltage converter between the input terminal and the output terminal;
- and
- a monitor control unit monitoring whether or not the DC input voltage satisfies a predetermined condition to be processed by the DC voltage converter, and connecting the input terminal to the output terminal via the bypass circuit when the DC input voltage does not satisfy the predetermined condition,
- wherein the bypass circuit including a voltage adjustment circuit, in which a voltage reduction across the voltage adjustment circuit is smaller than a voltage reduction across the DC voltage converter.
An electronic apparatus, comprising:
- a power supply circuit, including:
- an input terminal capable of being connected to a power supply;
- a DC voltage converter converting a DC input voltage supplied to the input terminal into a DC output voltage;
- an output terminal outputting the DC output voltage;
- a bypass circuit bypassing the DC voltage converter between the input terminal and the output terminal;
- and
- a monitor control unit monitoring whether or not the DC input voltage satisfies a predetermined condition to be processed in the DC voltage converter, and connecting the input terminal to the output terminal via the bypass circuit when the DC input voltage does not satisfy the predetermined condition;
- and
- a power receiving unit being supplied with electric power from the power supply circuit connected to the power supply, and including at least one component driven by the supplied electric power,
- wherein the bypass circuit including a voltage adjustment circuit, in which a voltage reduction across the voltage adjustment circuit is smaller than a voltage reduction across the DC voltage converter.
Dependencies are inferred from the claim text.