Buck-boost voltage converter

Details Buck-boost voltage converter Buck-boost voltage converter

2007-02-13

2007-02-13

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S283000

Reexamination Certificate

active

11160351

ABSTRACT:
An input switching unit selectively couples a first terminal of an inductor with an input voltage and a ground potential. An output switching unit selectively couples a second terminal of the inductor with an output voltage and the ground potential. A first pulse generating circuit generates a first pulse signal with a first duty ratio, which is modulated in response to the output voltage. A second pulse generating circuit generates a second pulse signal with a second pulse signal with a second duty ratio, which is a constant larger than zero and smaller than one. When the first duty ratio is larger than a predetermined threshold duty ratio, a mode control circuit applies the first pulse signal to control one of the input switching unit and the output switching unit and applies the second pulse signal to control another of the input switching unit and the output switching unit.

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Micropower SynchronousBuck-Boost DC/DC Converter, Linear Technology Corporation. 2001, pp. 1-20, Milpitas, CA, USA.

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