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US 10,298,126 B1Granted
Power converter controller
AssigneeTexas Instruments Incorporated
InventorsAnmol Sharma, Franz Prexl
Life of this patent
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Abstract
A circuit, comprising a trapezoidal generator that comprises digital logic configured to couple at a first input to a loop controller and at a second input to a buck-boost region detector and a driver coupled to an output of the digital logic and configured to couple to at least one power transistor of a power converter.
Claims19
A circuit, comprising:
- a trapezoidal generator, comprising:
- digital logic configured to couple at a first input to a loop controller and at a second input to a buck-boost region detector;
- and
- a driver coupled to an output of the digital logic and configured to couple to at least one power transistor of a power converter
- wherein the trapezoidal generator is configured to:
- generate a gate drive signal according to a triangular control pattern based at least partially on a control signal generated by the loop controller when the buck-boost region detector indicates that the power converter is not operating in the buck-boost region;
- and
- generate the gate drive signal according to a trapezoidal control pattern based at least partially on the control signal generated by the loop controller when the buck-boost region detector indicates that the power converter is operating in the buck-boost region.
5 more elements
A switched mode power supply (SMPS), comprising:
- a power converter;
- and
- a power converter controller, comprising:
- a loop controller configured to couple to the power converter to monitor at least one electrical characteristic of the power converter and generate a control signal based at least partially on the monitored electrical characteristic of the power converter;
- a buck-boost region detector configured to couple to the power converter to determine whether the power converter is operating in a buck-boost region;
- and
- a gate driver configured to couple to the power converter, the power converter controller, and the buck-boost region detector to control the power converter according to a trapezoidal control pattern based at least partially on the control signal when the buck-boost region detector indicates that the power converter is operating in the buck-boost region.
4 more elements
A method, comprising:
- controlling a power converter to generate an output voltage according to a power transistor on-time (Ton) in which an inductor associated with the power converter is configured to charge and a power transistor off-time (Toff) in which the inductor associated with the power converter is configured to discharge;
- determining whether the power converter is operating in a buck-boost region based at least partially on two of a input voltage of the power converter, the output voltage, or an inductor current of the inductor associated with the power converter;
- continuing to control the power converter according to Ton and Toff when the power converter is not operating in the buck-boost region;
- and
- controlling the power converter, when the power converter is operating in the buck-boost region, to generate the output voltage according to Ton, Toff, and at least one common mode time (COM) in which an input terminal of the power converter at which the input voltage is present is shorted to an output terminal of the power converter at which the output voltage is present.
2 more elements
Dependencies are inferred from the claim text.