DC-DC converter and power supply apparatus
First Claim
1. A DC-DC converter comprising:
- an inductance element and a rectifier element connected in series between a voltage input terminal to accept input direct current voltage and a first output terminal;
a switching element connected between a connection node of the inductance element and the rectifier element and a reference potential point, the switching element being directly connected to the connection node and the reference potential point; and
a controlling circuit to form a signal to control on/off of the switching element,wherein the controlling circuit controls on/off of the switching element to control current through the inductance element, and a voltage applied to the voltage input terminal to accept the input direct current voltage is output via a second output terminal as a reference potential of a circuit at a latter stage.
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Accused Products
Abstract
A DC-DC converter includes: an inductance element and a rectifier element connected in series between a voltage input terminal to accept input direct current voltage and a first output terminal; a switching element connected between a connection node of the inductance element and the rectifier element and a reference potential point; and a controlling circuit to form a signal to control on/off of the switching element. The controlling circuit controls on/off of the switching element to control current through the inductance element, and a voltage applied to the voltage input terminal to accept the input direct current voltage is output via a second output terminal as a reference potential of a circuit at a latter stage, so that an output voltage is controllable from a lower to higher voltage than the input direct current voltage without switching step-up and step-down operations.
10 Citations
10 Claims
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1. A DC-DC converter comprising:
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an inductance element and a rectifier element connected in series between a voltage input terminal to accept input direct current voltage and a first output terminal; a switching element connected between a connection node of the inductance element and the rectifier element and a reference potential point, the switching element being directly connected to the connection node and the reference potential point; and a controlling circuit to form a signal to control on/off of the switching element, wherein the controlling circuit controls on/off of the switching element to control current through the inductance element, and a voltage applied to the voltage input terminal to accept the input direct current voltage is output via a second output terminal as a reference potential of a circuit at a latter stage. - View Dependent Claims (2)
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3. A DC-DC converter comprising:
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a reference voltage input terminal to accept a reference potential; a voltage input terminal to accept an input direct current voltage; a step-up circuit to step-up the input direct current voltage; a first output terminal to output a voltage stepped-up by the step-up circuit; a second output terminal to output the voltage input from the voltage input terminal to a circuit at a latter stage as a reference potential of the circuit at the latter stage; a smoothing capacitor connected between the first output terminal and the second output terminal, wherein the DC-DC converter outputs the voltage stepped-up by the step-up circuit from the first output terminal referring to an output voltage of the second output terminal, and wherein the step-up circuit comprises; an inductance element and a rectifier element connected in series between the voltage input terminal and the first output terminal; a switching element connected between a connection node of the inductance element and the rectifier element and the reference voltage input terminal, the switching element being directly connected to the connection node and the reference voltage input terminal; a controlling circuit to form a signal to control on/off of the switching element; and a current detection circuit to detect a level of an output current flowing through the first output terminal, wherein the controlling circuit turns off the switching element when the output current exceeds a predetermined level. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification