Switching regulator and controller thereof
AssigneesSamsung Electronics Co., Ltd., Industry-University Cooperation Foundation Hanyang University
InventorsYOUNG-JIN MOON, CHANG-SIK YOO, MIN-GYU JEONG, KOOK-DONG KIM
Life of this patent
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Abstract
A switching regulator includes an inductor connected to an output terminal of the switching regulator, a switching circuit configured to supply a current from an input terminal of the switching regulator to the inductor in response to an activated control signal, and an RC circuit including a sense resistor and a sense capacitor and connected to the inductor in parallel, the sense resistor and the sense capacitor being connected to each other in series at a feedback node.
Claims20
A controller of a switching regulator, wherein the switching regulator includes an inductor connected to at least one output terminal of the switching regulator, a switching circuit configured to supply a current from at least one input terminal of the switching regulator to the inductor based on a control signal, and an RC circuit comprising at least one sense resistor connected in series to at least one sense capacitor and a feedback node, the RC circuit connected in parallel to the inductor;
- and the controller comprising:
- a first comparator configured to generate a first comparison signal based on a voltage of the feedback node and a first reference voltage;
- a first counter configured to count active pulses of the first comparison signal;
- and
- a control signal generator configured to generate the control signal based on a value of an output signal of the first counter and a first reference value;
- a reset signal generator confirmed to generate a reset signal based on the first comparison signal;
- and
- a reset switch configured to reset the sense capacitor by interconnecting both ends of the sense capacitor based on the reset signal,
- wherein the sense capacitor is reset more frequently than the first counter.
A switching regulator comprising:
- an inductor connected to an output terminal;
- an RC circuit connected in parallel to the inductor, the RC circuit comprising at least one sense resistor in series with at least one sense capacitor and a feedback node;
- a switching circuit configured to supply a current from an input terminal to the inductor based on a control signal;
- and
- a controller configured to reset the at least one sense capacitor by interconnecting both ends of the sense capacitor and generate the control signal based on a number of times a voltage of the feedback node intersects at least one reference voltage,
- wherein the controller is further configured to reset the at least one sense capacitor more frequently than a number of times that the voltage of the feedback node intersects at least one reference voltage is reset.
A switching regulator for a power supply, the switching regulator comprising:
- an RC circuit configured to detect a current flowing through an inductor and transmit a feedback voltage based on the detected current, the RC circuit including at least one sense resistor and at least one sense capacitor, the RC circuit in parallel with an inductor, and the inductor further connected to an output terminal, an output capacitor, and a switching circuit;
- a controller configured to reset the at least one sense capacitor by interconnecting both ends of the sense capacitor and generate a control signal based on a number of times that the feedback voltage deviates from a desired voltage range, the desired voltage range defined by at least one reference voltage;
- and
- the switching circuit is configured to control the inductor based on the generated control signal, the controlling including supplying a current from an input terminal to the inductor based on the generated control signal,
- wherein the controller is further configured to reset the at least one sense capacitor more frequently than a number of times that the feedback voltage deviates from the desired voltage range is reset.
Dependencies are inferred from the claim text.