DC/DC converter
AssigneeRohm Co., Ltd.
InventorsKenichi Nakata, Mikiya Doi
Life of this patent
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Abstract
A DC/DC converter is supplied such that the desired output setting voltage can be obtained as the load-side output, even when the difference between the power supply voltage and the output setting voltage of the load-side output is large. This DC/DC converter comprises a switching device, a voltage divider, an error amplifier, an oscillator which outputs a oscillation clock, a slope circuit which receives the oscillation clock and outputs a sawtooth waveform voltage having a slope which begins at the leading edge of the oscillation clock, a comparator which compares the sawtooth waveform voltage and the output voltage of the error amplifier, and a logic circuit which is set by the trailing edge of the oscillation clock, and is reset by the output of the comparator.
Claims9
1-4. (canceled)
A DC/DC converter, comprising:
- a switching device which, by closing and opening, supplies power from a power-supply side to a load side, and maintains the load side at an output setting voltage;
- an oscillator which outputs a oscillation clock;
- and,
- a logic circuit which is set in synchronization with a trailing edge of the oscillation clock and reset by the signal that is synchronized with a leading edge, prior to the trailing edge, of the oscillation clock and is delayed from the leading edge by a time according to the voltage from the load side and longer than a pulse width from the leading edge to the trailing edge,
- wherein said switching device closes and opens according to the output pulse signal from said logic circuit.
Dependencies are inferred from the claim text.