Electric power conversion systems – Current conversion – With voltage multiplication means
Reexamination Certificate
2011-03-15
2011-03-15
Laxton, Gary L (Department: 2838)
Electric power conversion systems
Current conversion
With voltage multiplication means
C307S110000
Reexamination Certificate
active
07907429
ABSTRACT:
A circuit and method for providing a fully integrated DC-DC converter using on-chip switched capacitors is disclosed. A switched capacitor matrix is coupled as a digitally controlled transfer capacitor. A pair of non-overlapping, fixed frequency clock signals is provided to a switched capacitor circuit including the switched capacitor matrix and a load capacitor coupled to the output terminal. A DC input voltage supply is provided. A hysteretic feedback loop is used to control the voltage at the output as a stepped-down voltage from the input by digitally modulating the transfer capacitor using switches in the switch matrix to couple more, or fewer, transfer capacitors to the output terminal during a clock cycle. A coarse and a fine adjustment circuit are provided to improve the regulation during rapid changes in load power. A method of operating the regulator is disclosed.
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Fayed Ayman A.
Haroun Baher
Ramadass Yogesh K.
Brady III Wade James
Laxton Gary L
Neerings Ronald O.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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