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US 8,618,781 B2Granted
Output voltage controller, electronic device, and output voltage control method
AssigneeSpansion LLC
InventorToru Miyamae
Life of this patent
Estimating the term…
Abstract
An output voltage controller includes a first controller which controls current supply to a inductor based on an output voltage, and a second controller which controls current supply to the inductor by controlling a period when an input end to which an input voltage is inputted, the inductor, and an output end from which the output voltage is outputted are coupled based on the input voltage.
Claims14
An output voltage controller, comprising:
- a first controller which controls a current supply to an inductor based on an output voltage;
- a second controller which controls a current supply to the inductor by controlling a period when an input end to which an input voltage is inputted, the inductor, and an output end from which the output voltage is outputted, are coupled based on the input voltage;
- a logic circuit which generates a driving signal for controlling current supply to the inductor based on an output signal from the first controller and a control signal outputted from the second controller;
- and
- a switch circuit which controls current supply to the inductor based on the driving signal,
- wherein the switch circuit comprises a first switch which couples a first end of the inductor to the input end and a ground end, and a second switch which couples a second end of the inductor to the output end and a ground.
3 more elements
An output voltage control method comprising:
- controlling current supply to a inductor based on an output voltage using a first controller;
- and
- controlling current supply to the inductor by controlling a period when an input end to which an input voltage is inputted, the inductor, and an output end from which the output voltage is outputted are coupled based on the input voltage using a second controller;
- generating a driving signal for controlling current supply to the inductor based on an output signal from the first controller and a control signal outputted from the second controller;
- and
- controlling current supply to the inductor based on the driving signal using a switch circuit,
- wherein the switch circuit comprises a first switch which couples a first end of the inductor to the input end and a ground end, and a second switch which couples a second end of the inductor to the output end and a ground end,
- wherein the second controller outputs a control signal for making a first period when energy accumulated in the inductor is released shorter as the input voltage becomes closer to the output voltage when the input voltage is higher than the output voltage, and
- wherein the second controller outputs a control signal for making a second period when energy is accumulated in the inductor shorter as the input voltage becomes closer to the output voltage when the input voltage is lower than the output voltage.
6 more elements
An electronic device, comprising:
- an output voltage controller,
- wherein the output voltage controller comprises
- a first controller which controls power supply to a inductor based on an output voltage and
- a second controller which controls current supply to the inductor by controlling a period when an input end to which an input voltage is inputted, the inductor, and an output end from which the output voltage is outputted are coupled based on the input voltage;
- a logic circuit which generates a driving signal for controlling current supply to the inductor based on an output signal from the first controller and a control signal outputted from the second controller;
- and
- a switch circuit which controls current supply to the inductor based on the driving signal,
- wherein the switch circuit comprises a first switch which couples a first end of the inductor to the input end and a ground end, and a second switch which couples a second end of the inductor to the output end and a ground end,
- wherein the second controller outputs a control signal for making a first period when energy accumulated in the inductor is released shorter as the input voltage becomes closer to the output voltage when the input voltage is higher than the output voltage, and
- wherein the second controller outputs a control signal for making a second period when energy is accumulated in the inductor shorter as the input voltage becomes closer to the output voltage when the input voltage is lower than the output voltage.
7 more elements
Dependencies are inferred from the claim text.