Methods and systems for reducing power consumption
First Claim
Patent Images
1. A power supply system for an apparatus, the power supply system comprising:
- an AC (alternating current) to DC (direct current) converter having an input to receive an AC voltage from an AC source and having a DC voltage output and having a control input, the control input being configured to control a voltage of the DC voltage output;
a first DC to DC converter having an input coupled to the DC voltage output and having an output configured to provide a DC supply voltage to a first component of the apparatus;
a controller having a first input coupled to the DC voltage output and having a first output coupled to the control input of the AC to DC converter, the controller being configured to monitor an operating state of the apparatus and to adjust, in response to the monitoring of the operating state of the apparatus, a parameter of a signal of the first output of the controller, the parameter adjustment causing the AC to DC converter to reduce the voltage of the DC voltage output while maintaining the DC supply voltage output from the DC to DC converter.
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Abstract
Methods and systems for managing power are described. In one embodiment of a method, a DC input voltage from an AC mains to DC converter, inputted to a DC to DC converter, is adjusted lower while maintaining substantially constant DC output voltage from the DC to DC converter in order to improve power efficiency.
26 Citations
34 Claims
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1. A power supply system for an apparatus, the power supply system comprising:
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an AC (alternating current) to DC (direct current) converter having an input to receive an AC voltage from an AC source and having a DC voltage output and having a control input, the control input being configured to control a voltage of the DC voltage output; a first DC to DC converter having an input coupled to the DC voltage output and having an output configured to provide a DC supply voltage to a first component of the apparatus; a controller having a first input coupled to the DC voltage output and having a first output coupled to the control input of the AC to DC converter, the controller being configured to monitor an operating state of the apparatus and to adjust, in response to the monitoring of the operating state of the apparatus, a parameter of a signal of the first output of the controller, the parameter adjustment causing the AC to DC converter to reduce the voltage of the DC voltage output while maintaining the DC supply voltage output from the DC to DC converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for operating a power supply comprising:
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monitoring a system state of a system receiving power from the power supply to determine whether the system is in at least one of a standby mode or a low power mode; converting, in an AC to DC converter in the power supply, an AC voltage to a DC voltage to generate an input DC voltage that is inputted to a DC to DC converter; reducing the input DC voltage to the DC to DC converter while maintaining an output DC voltage from the DC to DC converter in an acceptable range, if the system is in at least one of the standby mode or the low power mode. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A machine readable non-transitory storage medium storing executable instructions which when executed cause a system to perform a method for operating a power supply, the method comprising:
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monitoring a system state of a system receiving power from the power supply to determine whether the system is in at least one of a standby mode or a low power mode; converting, in an AC to DC converter in the power supply, an AC voltage to a DC voltage to generate an input DC voltage that is inputted to a DC to DC converter; reducing the input DC voltage to the DC to DC converter while maintaining an output DC voltage, from the DC to DC converter, substantially constant, if the system is in at least one of the standby power mode or the low power mode. - View Dependent Claims (26, 27, 28, 29)
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30. A power supply system for an apparatus, the power supply system comprising:
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an AC (alternating current) to DC (direct current) converter having an input to receive an AC voltage from an AC source and having DC voltage output and having a control input, the control input being configured to control a voltage of the DC voltage output; a first DC to DC converter having an input coupled to the DC voltage output and having an output configured to provide a DC supply voltage to a first component of the apparatus; a controller having a first input coupled to the DC voltage output and having a first output coupled to the control input of the AC to DC converter, the controller being configured to monitor an operating state of the apparatus and to adjust, in response to the monitoring of the operating state, a parameter of a signal of the first output of the controller, the parameter adjustment causing the AC to DC converter to reduce the voltage of the DC voltage output while maintaining the DC supply voltage output from the DC to DC converter in an acceptable range. - View Dependent Claims (31, 32, 33, 34)
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Specification