Method and apparatus to control output power from a switching power supply
First Claim
1. A switching regulator, comprising:
- a switch to be coupled to an energy transfer element of a power supply;
a controller coupled to the switch to control a switching of the switch to regulate a combination of an output voltage and an output current at a power supply output; and
a feedback circuit coupled to the controller, the feedback circuit coupled to receive a feedback signal from the output of the power supply, wherein combinations of the output voltage and the output current correspond to output regions such that there is at least one regulated output region and one unregulated output region, wherein at least one unregulated output region is a self protection auto-restart region, wherein within at least one unregulated output region the switching regulator provides continuous output power at substantially the maximum output power of the switching regulator, and wherein each output region corresponds to a magnitude and duration of the feedback signal.
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Abstract
Techniques are disclosed to control output power from a switching power supply. For example, a switching regulator according to aspects of the present invention includes a switch to be coupled to an energy transfer element of a power supply. A controller is coupled to the switch to control a switching of the switch to regulate an output voltage and an output current at an output of power supply output. A feedback circuit is coupled to the controller. The feedback circuit is coupled to receive a feedback signal from the output of the power supply. Combinations of the output voltage and the output current correspond to output regions. There is at least one regulated output region and one unregulated output region. At least one unregulated output region is a self protection auto-restart region. Within at least one unregulated output region, the switching regulator provides continuous output power at substantially the maximum output power of the switching regulator. Each output region corresponds to a magnitude and duration of the feedback signal.
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Citations
10 Claims
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1. A switching regulator, comprising:
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a switch to be coupled to an energy transfer element of a power supply;
a controller coupled to the switch to control a switching of the switch to regulate a combination of an output voltage and an output current at a power supply output; and
a feedback circuit coupled to the controller, the feedback circuit coupled to receive a feedback signal from the output of the power supply, wherein combinations of the output voltage and the output current correspond to output regions such that there is at least one regulated output region and one unregulated output region, wherein at least one unregulated output region is a self protection auto-restart region, wherein within at least one unregulated output region the switching regulator provides continuous output power at substantially the maximum output power of the switching regulator, and wherein each output region corresponds to a magnitude and duration of the feedback signal. - View Dependent Claims (2, 3, 4)
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5. A method, comprising:
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measuring a feedback signal received from an output of a power supply to control an output power of the power supply;
operating the power supply in an unregulated auto-restart mode if the feedback signal is less than a first threshold; and
operating the power supply in a regulated mode if the feedback signal is between the first threshold and a second threshold while greater than a third threshold. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification