Dc-dc converter with droop regulation
AssigneeChengdu Monolithic Power Systems Co., Ltd.
InventorsLijie Jiang, Xiaokang Wu, Binci Xu
Life of this patent
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Abstract
A DC-DC converter with droop regulation for better transient performance. The DC-DC converter includes a switching circuit, a comparison circuit and a logic control circuit. A differential voltage indicative of an output voltage of the switching circuit, and a droop voltage indicative of an output current of the switching circuit, are generated. A high-pass filtered signal is obtained by high-pass filtering the droop voltage. The comparison circuit responds to the differential voltage, a reference voltage and the high-pass filtered signal to generate a set signal. The logic control circuit generates a control signal based on the set signal to control the switching circuit.
Claims18
A DC-DC converter, comprising:
- a switching circuit having a power switch, wherein the power switch is turned on and off periodically to convert an input voltage to an output voltage to supply power to a load;
- a comparison circuit, generating a set signal based on a differential voltage, a reference voltage and a high-pass filtered signal obtained by high-pass filtering a droop voltage, wherein the differential voltage is indicative of the output voltage, and the droop voltage is indicative of an output current;
- and
- a logic control circuit, generating a control signal based on the set signal to control the power switch of the switching circuit.
A DC-DC converter, comprising:
- a switching circuit having a power switch, wherein the power switch is turned on and off periodically to convert an input voltage to an output voltage to supply power to a load;
- a comparison circuit, generating a set signal based on the sum of a first filtering signal and a reference voltage, and the sum of a second filtering signal and a differential voltage, wherein the first filtering signal and the second filtering signal are respectively obtained by low-pass filtering the droop voltage, the differential voltage is indicative of the output voltage, and the droop voltage is indicative of an output current;
- and
- a logic control circuit, generating a control signal based on the set signal to control the switching circuit.
A method of controlling a DC-DC converter, wherein the DC-DC converter comprises a switching circuit to convert an input voltage to an output voltage for supplying power to a load, the method comprising:
- providing a differential voltage indicative of the output voltage, and a droop voltage indicative of an output current;
- high-pass filtering the droop voltage to generate a high-pass filtered signal;
- comparing the sum of the high-pass filtered signal and the reference voltage with the differential voltage, or comparing the sum of the high-pass filtered signal and the differential voltage with the reference voltage, to generate a set signal;
- and
- responding to the set signal to control the switching circuit.
Dependencies are inferred from the claim text.