SWITCHING POWER SUPPLY APPARATUS
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Accused Products
Abstract
A switching power supply apparatus includes an isolated converter with efficiency characteristics in which power conversion efficiency of a rated load is higher than power conversion efficiency of a light load and that converts power-supply voltage into direct-current voltage to output the direct-current voltage, a secondary battery that stores the direct-current voltage output from the isolated converter; a voltage detector that detects an amount of charge in the secondary battery; and a controller that switches driving and stopping of the isolated converter on the basis of the detected amount of charge.
13 Citations
17 Claims
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1. (canceled)
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2. A switching power supply apparatus comprising:
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a first converter configured to have efficiency characteristics in which power conversion efficiency of a rated load is higher than power conversion efficiency of a light load and that converts power-supply voltage that is input into direct-current voltage to output the direct-current voltage; a charge unit configured to store the direct-current voltage output from the first converter; an amount-of-charge detecting unit configured to detect an amount of charge in the charge unit; and a controller configured and programmed to switch driving and stopping of the first converter based on the amount of charge detected by the amount-of-charge detecting unit;
whereinthe controller is configured and programmed to stop the first converter if the amount of charge in the charge unit is higher than a first threshold value and drive the first converter if the amount of charge in the charge unit is lower than a second threshold value; the controller is configured and programmed to output the direct-current voltage subjected to the conversion in the first converter and store the direct-current voltage subjected to the conversion in the first converter in the charge unit when the first converter is driven and output the direct-current voltage stored in the charge unit when the first converter is stopped; and a frozen period during which the first converter is stopped to be in a frozen state is controlled depending on an increase and a decrease of output power and the frozen period is lengthened with the decreasing output power. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification