Electricity: power supply or regulation systems – In shunt with source or load – Using a three or more terminal semiconductive device
Reexamination Certificate
2011-06-07
2011-06-07
Laxton, Gary L (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using a three or more terminal semiconductive device
C323S259000, C323S271000, C323S284000
Reexamination Certificate
active
07956586
ABSTRACT:
To provide a control circuit and control method of a step-up/step-down type DC-DC converter capable of realizing high efficiency. In a state (1), a terminal Tx of a choke coil L1is connected to an input terminal Tin, and a terminal Ty is connected to a reference potential. In a state (2), the terminal Tx is connected to the reference potential, and the terminal Ty is connected to an output terminal Tout. In the state (3), the terminal Tx is connected to the input terminal Tin, and the terminal Ty is connected to the output terminal Tout. A first period operation TO1is constituted by the states (1) and (2), and a second period operation TO2is constituted by the states (1) and (3). A second period T2, in which the second period operation TO2is performed, is a value n times as long as a first period T1, in which the first period operation TO1is performed. In the second period operation TO2, the state (1) is switched to the state (3) so that an increasing slope of an inductor current IL is reduced.
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“Chinese Office Action,” mailed Oct. 30, 2009 in corresponding CN Patent Appl. No. 200710109427.5, Full English translation.
Inatomi Koichi
Matsumoto Takashi
Nagai Ryuta
Fujitsu Patent Center
Fujitsu Semiconductor Limited
Laxton Gary L
Quddus Nusrat J
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