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AssigneesUniversity of Toronto, Fuji Electric Systems Co., Ltd.
InventorsWai Tung NG, Jing WANG, Kendy NG, Haruhiko NISHIO, Masahiro SASAKI, Tetsuya KAWASHIMA
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A fully integrated DC-DC converter utilizes digitally controlled dual output stages to achieve fast load transient recovery is presented. The DC-DC converter includes a main converter output stage connected in parallel with an auxiliary output stage. The main output stage is responsible for steady-state operation and is designed to achieve high conversion efficiency using large inductor and power transistors with low on-resistance. The auxiliary stage is responsible for transient suppression and is only active when a load transient occurs. The auxiliary output stage performs well with inductor and power transistors much smaller than those of the main switching stage and thus achieves well balanced power conversion efficiency and dynamic performance with a much smaller area penalty than previously described dual-output-stage converters.
A DC-DC converter comprising:
A method of operating a DC-DC converter that includes an auxiliary converter output stage connected in parallel to the main converter output stage, and a digital controller coupled to the main converter output stage and the auxiliary converter output stage that operates in a linear controller mode when no load transient is present and operates in a non-linear controller mode when a load transient is detected, the method including:
Dependencies are inferred from the claim text.