Inductor current sensing and regulation for power converter
AssigneeTexas Instruments Incorporated
InventorsReza Sharifi, Kevin Scoones, Orlando Lazaro, Alvaro Aguilar
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Abstract
In described examples of methods and control circuitry to control a power conversion system, a regulator circuit is coupled to provide switching control signals according to a regulation signal to operate a plurality of converter switches to generate a voltage signal at a switching node. A compensation sense circuit is coupled to provide a compensation pulse signal having a duty cycle that represents a percentage of time that a current flowing through the switching node is above a threshold value. A current compensation circuit adjusts the regulation signal according to the compensation pulse signal.
Claims21
A power conversion system to convert an input signal at an input node into an output signal at an output node, the power conversion system comprising:
- a converter circuit, including a plurality of converter switches operative according to a plurality of switching control signals to generate a voltage signal at a switching node;
- an inductor coupled to the switching node;
- a compensation sense circuit, including an output to provide a compensation pulse signal having a duty cycle that represents a percentage of time that an inductor current flowing through the inductor is above a threshold value;
- a regulator circuit to provide the switching control signals as pulse width modulated signals, according to a regulation signal, to control the output signal;
- and
- a current compensation circuit to adjust the regulation signal according to the compensation pulse signal.
A control circuit to control a power conversion system, the control circuit comprising:
- a regulator circuit to provide switching control signals according to a regulation signal to operate a plurality of converter switches to generate a voltage signal at a switching node;
- a compensation sense circuit, including an output to provide a compensation pulse signal having a duty cycle that represents a percentage of time that a current flowing through the switching node is above a threshold value;
- and
- a current compensation circuit to adjust the regulation signal according to the compensation pulse signal.
A method of controlling a power conversion system, the method comprising:
- generating switching control signals, according to a regulation signal, to operate a plurality of converter switches to generate a voltage signal at a switching node of the power conversion system;
- providing a compensation pulse signal having a duty cycle that represents a percentage of time that a current flowing through the switching node is above a threshold value;
- and
- adjusting the regulation signal according to the compensation pulse signal.
Dependencies are inferred from the claim text.