Switched mode power supply and controlling method thereof
AssigneeLG Electronics Inc.
InventorsDong Ju Lee, Dae Beum Pyeon
Life of this patent
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Abstract
A power supply circuit includes a power converter and a control circuit. The power converter converts AC power to DC power, and the control circuit controls operation of the power converter. The control circuit repeatedly enables the conversion operation of the power converter for a first predetermined period of time and disables the conversion operation for a second predetermined period of time, greater than said first predetermined period of time, in a power saving mode of operation.
Claims32
A power supply circuit, comprising:
- a power converter converting AC power to DC power to supply the DC power to at least one load;
- a control circuit controlling operation of the power converter, the control circuit detecting if the load consumes the DC power, and placing the power supply circuit in a power-saving mode if the load does not consume power for a predetermined amount of time, the control circuit repeatedly enabling the conversion operation of the power converter for a first predetermined period of time and disabling the conversion operation for a second predetermined period of time, greater than said first predetermined period of time, in the power savings mode of operation.
A power supply circuit, comprising:
- a power converter converting AC power to DC power to supply the DC power to at least one load;
- and
- a control circuit controlling operation of the power converter, the control circuit detecting if the load consumes the DC power, and placing the power supply circuit in a power saving mode if the load does not consume power for a predetermined amount of time, controlling a supply of the AC power to the power converter such that the power converter is periodically disconnected from the AC power during the power savings mode.
A method of supplying power, comprising:
- detecting whether at least one load connected to a power converter consumes power output from the power converter,
- judging that operation in a power savings mode should occur when the detecting step indicates that the load has not consumed power for a predetermined amount of time;
- and
- alternately enabling and disabling a power conversion operation of a power converter such that the power conversion operation is enabled for a first predetermined period of time and is disabled for a second predetermined period of time, greater than the first predetermined period of time, when the judging step judges that operation in the power savings mode should occur.
A power supply circuit, comprising:
- a power converter converting AC power to DC power to supply the DC power to at least one load;
- a detector detecting an output DC voltage of the power converter;
- a driving controller controlling operation of the power converter based on output from the detector and a control signal so that the power converter outputs the DC voltage at a constant level;
- a microcomputer determining based on output of the detector if the load consumes the DC power, placing the power supply circuit in a power saving mode if the load does not consume power for a predetermined amount of time, and generating the control signal to enable the conversion operation of the power converter for the first predetermined period of time and to disable the conversion operation for the second predetermined period of time in the power saving mode of operation, the microcomputer receiving power from the power converter when the power converter is enabled;
- and
- a back-up power storage unit supplying power to the microcomputer when the power converter is disabled.
Dependencies are inferred from the claim text.