Buck-boost DC-DC converter
AssigneesSKAIChipsCo., Ltd., Research & Business Foundation Sungkyunkwan University
InventorsKang Yoon Lee, Reza Eftekhari Rad, Qurat ul Ain, Jong Wan Jo, Kyung Duk Choi, Young Gun Pu
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Abstract
The present invention provides a technique for a power supply, and particularly, a buck-boost DC-DC converter which is advantageous for energy harvesting from a low voltage. An LC resonant unit generates a pair of clock type signals having phases opposite to each other from an input signal. These signals are supplied to the clock input terminals of the Dickson charge pumps connected in series and converted into power signals having an amplified voltage so as to match the rated input specification of the buck-boost DC-DC converter of a post-stage.
Claims18
A buck-boost DC-DC converter comprising:
- an LC resonant unit configured to convert an input signal into a clock signal and output the converted clock signal;
- a voltage booster which includes a plurality of charge pumps driven by the clock signal output from the LC resonant unit and connected in series with each other (‘cascaded charge pumps’), and is configured to amplify an input voltage thereof;
- and
- a buck-boost converter configured to boost and output an output power of the voltage booster,
- wherein a power input terminal of a first stage of the plurality of charge pumps in the voltage booster is grounded.
A buck-boost DC-DC converter comprising:
- an LC resonant unit configured to convert an input signal into a clock signal and output the converted clock signal;
- a voltage booster which includes a plurality of charge pumps driven by the clock signal output from the LC resonant unit and connected in series with each other (‘cascaded charge pumps’), and is configured to amplify an input voltage thereof;
- and
- a buck-boost converter configured to boost and output an output power of the voltage booster,
- wherein the clock signal outputted from the LC resonant unit includes a pair of clocks having phases opposite to each other and wherein each of the plurality of charge pumps are Dickson charge pumps driven by the pair of clocks,
- wherein the voltage booster comprises:
- a low voltage amplification unit including a plurality of Dickson charge pumps which are implemented as a low voltage transistor respectively, and are connected in series with each other.
Dependencies are inferred from the claim text.