Method of controlling DC/DC converter
First Claim
1. A method of controlling a DC/DC converter, comprising:
- obtaining an output signal from an output voltage detecting and adjusting circuit, which controls an output of the DC/DC converter at a constant DC voltage, to use as a reference signal for determining an on-off timing of a switching element, comparing the reference signal and a carrier signal of a constant frequency, providing to the switching element a control signal for controlling an oscillating period and a forced stop period of the switching element in a state of light load including a state of no load, said control signal being obtained from a comparison signal by comparing the reference signal and the carrier signal to thereby operate the switching element on and off intermittently to convert a voltage supplied from a DC power supply to a constant DC voltage.
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Accused Products
Abstract
A DC/DC converter converts a voltage of a DC power supply to another DC voltage by switching on and off a switching element, which determines an oscillating period and a forced stop period of the switching element based on a comparison signal obtained by comparing an output of an output-voltage detecting and adjusting circuit, which controls the output of the DC/DC converter at a certain voltage, and an output of a triangular-wave generating circuit in a second comparator. The DC/DC converter facilitates confining the pulsation of the output voltage of the DC/DC converter caused by the maximum load in the state of light load including the state of no load, within an allowable range, and reducing the switching and conduction losses.
33 Citations
8 Claims
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1. A method of controlling a DC/DC converter, comprising:
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obtaining an output signal from an output voltage detecting and adjusting circuit, which controls an output of the DC/DC converter at a constant DC voltage, to use as a reference signal for determining an on-off timing of a switching element, comparing the reference signal and a carrier signal of a constant frequency, providing to the switching element a control signal for controlling an oscillating period and a forced stop period of the switching element in a state of light load including a state of no load, said control signal being obtained from a comparison signal by comparing the reference signal and the carrier signal to thereby operate the switching element on and off intermittently to convert a voltage supplied from a DC power supply to a constant DC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification