Power control device, power supply device, and power control method
AssigneeFujitsu Semiconductor Limited
InventorsToshihiko Kasai, Hidenobu Ito
Life of this patent
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Abstract
A power control device for performing switching control for an output voltage of a power supply device includes a signal generation circuit for comparing a difference between a value of the output voltage and a value of a first reference voltage with a value of a second reference voltage, and for stopping the switching control when a value of the difference is less than or equal to the value of the second reference voltage, and an adjuster circuit for adjusting the second reference voltage based on a ratio between a value of an input voltage and the value of the output voltage.
Claims16
A power control device for performing switching control for an output voltage of a power supply device, the power control device comprising:
- a signal generation circuit configured to receive a second reference voltage and a difference between a value of the output voltage and a value of a first reference voltage, compare the difference with the second reference voltage, and stop the switching control when a value of the difference is less than or equal to the value of the second reference voltage;
- and
- an adjuster circuit configured to receive an input voltage and the output voltage, adjust the second reference voltage based on a ratio between a value of an input voltage and the value of the output voltage and output an adjusted second reference voltage to the signal generation circuit as the second reference voltage.
A power supply device, comprising:
- a switch configured to supply power from an input end of the power supply device to an output end of the power supply device based on switching control;
- a signal generation circuit configured to receive a second reference voltage and a difference between a value of an output voltage and a value of a first reference voltage, compare the difference with the second reference voltage, and stop the switching control for the switch when a value of the difference is less than or equal to the value of the second reference voltage;
- and
- an adjuster circuit configured to receive an input voltage and the output voltage, adjust the second reference voltage based on a ratio between a value of an input voltage and the value of the output voltage and output an adjusted second reference voltage to the signal generation circuit as the second reference voltage.
A power control method for performing switching control for an output voltage of a power supply device, the power control method comprising:
- receiving a second reference voltage and a difference between a value of the output voltage and a value of a first reference voltage;
- comparing the difference with a value of a second reference voltage;
- receiving an input voltage and the output voltage to adjust the value of the second reference voltage based on a ratio between a value of an input voltage and the value of the output voltage and output an adjusted second reference voltage to be subjected to the comparing as the second reference voltage;
- and
- stopping the switching control when a value of the difference is less than or equal to the value of the second reference voltage.
Dependencies are inferred from the claim text.