Trapezoidal current mode for multilevel DC-DC converter
AssigneesNanyang Technological University, Lite-On Singapore Pte. Ltd., Lite-On Technology Corporation
InventorsZhi-Gang Yao, Yi Tang, Jing Yang, Shih-Ming Chen, Jung-Chih Wei
Life of this patent
Estimating the term…
Abstract
In an aspect of the disclosure, a pulse generator for applying to a multilevel DC-DC converter including a filter is provided. The pulse generator includes a controller and multiple capacitor-switch modules coupled to the controller and configured to receive an input voltage of the multilevel DC-DC converter and output an inductor current with a trapezoidal waveform on an inductor of the filter.
Claims20
A pulse generator for applying to a multilevel DC-DC converter including a filter, comprising:
- a controller;
- and
- a plurality of capacitor-switch modules, coupled to the controller and configured to receive an input voltage of the multilevel DC-DC converter and output an inductor current with a trapezoidal waveform on an inductor of the filter,
- wherein the controller measures the input voltage, the output voltage and the inductor current of the multilevel DC-DC converter, calculates three duty cycles, and assigns the three duty cycles to the plurality of capacitor-switch modules to generate a pulse-width modulation (PWM),
- wherein the PWM correspondingly forms a three level sequence of an output voltage of the pulse generator, and the three level sequence of the output voltage of the pulse generator correspondingly forms the inductor current with the trapezoidal waveform on the inductor of the filter.
A method for outputting an inductor current with the trapezoidal waveform of a multilevel DC-DC converter, comprising:
- measuring, by a controller, an input voltage, an output voltage and the inductor current of the multilevel DC-DC converter;
- calculating, by the controller, three duty cycles;
- and
- assigning, by the controller, the three duty cycles to a plurality of capacitor-switch modules of a pulse generator of the multilevel DC-DC converter to generate a pulse-width modulation (PWM),
- wherein the PWM correspondingly forms a three level sequence of an output voltage of the pulse generator, and the three level sequence of the output voltage of the pulse generator correspondingly forms the inductor current with the trapezoidal waveform on an inductor of a filter of the multilevel DC-DC converter.
Dependencies are inferred from the claim text.