Switching parameter based discontinuous mode-critical conduction mode transition
First Claim
1. An apparatus comprising:
- a controller to provide at least dual-mode conduction control of a switching power converter, wherein the controller is configured to;
control transitions between discontinuous conduction mode and critical conduction mode of the switching power converter using a measured switching time parameter having a value corresponding with an approximately peak voltage of a time-varying supply voltage supplied to the switching power converter.
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Abstract
An electronic system includes a controller to provide at least dual-mode conduction control of a switching power converter. In at least one embodiment, the controller is capable to control transitions between discontinuous conduction mode (DCM) and critical conduction mode (CRM) of the switching power converter using a measured switching time parameter having a value corresponding with an approximately peak voltage of a time-varying supply voltage supplied to the switching power converter. In at least one embodiment, the controller dynamically compensates for changing parameters of the electronic system by dynamically determining a minimum non-conductive time of the control switch of the switching power converter using the measured switching time parameter value at approximately the peak of the supply voltage of the supply voltage.
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Citations
28 Claims
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1. An apparatus comprising:
a controller to provide at least dual-mode conduction control of a switching power converter, wherein the controller is configured to; control transitions between discontinuous conduction mode and critical conduction mode of the switching power converter using a measured switching time parameter having a value corresponding with an approximately peak voltage of a time-varying supply voltage supplied to the switching power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
providing at least dual-mode conduction control of a switching power converter, wherein providing at least dual-mode conduction control of a switching power converter comprises; controlling transitions between discontinuous conduction mode and critical conduction mode of the switching power converter using a measured switching time parameter having a value corresponding with an approximately peak voltage of a time-varying supply voltage supplied to the switching power converter. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus comprising:
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a switching power converter; a controller, coupled to the switching power converter, to provide at least dual-mode conduction control of the switching power converter, wherein the controller is configured to; control transitions between discontinuous conduction mode and critical conduction mode of the switching power converter using a measured switching time parameter having a value corresponding with an approximately peak voltage of a time-varying supply voltage supplied to the switching power converter; and control power factor correction for the switching power converter; and a load coupled to the switching power converter. - View Dependent Claims (28)
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Specification