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A new circuit is proposed for a steep step-up of the line voltage. It integrates a switched-capacitor (SC) circuit within a boost converter. An SC circuit can achieve any voltage ratio, allowing for a boost of the input voltage to high values. It is unregulated to allow for a very high efficiency. The boost stage has a regulation purpose. It can operate at a relatively low duty cycle, thus avoiding diode-reverse recovery problems. The new circuit is not a cascade interconnection of the two power stages; their operation is integrated. The simplicity and robustness of the solution, the possibility of getting higher voltage ratios than cascading boost converters, without using transformers with all their problems, and the good overall efficiency are the benefits of the proposed converter. [ABSTRACT FROM AUTHOR]

Presents a generalized circuit structure of bi-directional switched-capacitor dc/dc converters that feature voltage step-down, voltage step-up, and bi-directional power flow. Derivation of two structures of single-capacitor bi-directional converter cells; Control scheme applied in the capacitor-charging phase; Formulation of a converter string by cascading a number of converter cells.

Presents a technique for calculating the alternating current line-to-output and control-to-output transfer characteristics of direct current (dc)/dc converters. Algorithm description; Illustrative examples; Conclusion.

Proposes a direct current (dc)-dc boost converter operating under zero-voltage-transition (ZVT) conditions. Information on ZVT-pulse-width modulation boost converter; DC analysis and time-domain simulation; Discussion on alternating current small signal analysis; What the proposed converter achieves.

Focuses on the development of zero-voltage-transition pulsewidth modulation (PWM) dc-dc converter by adding two active switches and three diodes to the structure of a quasi-resonant converter. Description of zero-voltage-transition technique; Analysis of a steady-state cycle and derivation of the dc voltage conversion ratio; Design considerations and practical challenges; Experimental results.

Presents a study which examined the high power density and regulation capacity of a switch-capacitor inverter as part of an electric circuit. Increase in demand for alternating current power supplies; Principles of the proposed switched-capacitor inverter; Operation of the switched-capacitor circuit.

Presents a method for determining boundaries of the feedback gains in a switching regulator with multiple feedbacks. Outline of model; Example of boost converter with inductor current and output voltage feedback; How large-signal stability of design is checked.