Electric power conversion systems – Current conversion – Using semiconductor-type converter
Reexamination Certificate
2006-08-18
2008-11-25
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Using semiconductor-type converter
C323S225000, C323S288000
Reexamination Certificate
active
07457140
ABSTRACT:
According to an embodiment of the present invention, a method is provided for hysteretic control of a DC-to-DC power converter system having first and second switches connected in a half-bridge arrangement at a common node and through an inductor to a regulated output terminal, wherein the regulated output terminal is connectable to an output capacitor and a load. The method includes the following: generating a feedback signal which tracks current flowing through the inductor; comparing the feedback signal against a reference voltage to generate a control signal; and controlling the magnitude of an output voltage which appears at the regulated output terminal in response to the control signal, thereby providing hysteretic control of the DC-to-DC converter which is not dependent on an equivalent series resistance (ESR) of the output capacitor.
REFERENCES:
patent: 6828762 (2004-12-01), Brkovic
patent: 6894471 (2005-05-01), Corva et al.
patent: 7061157 (2006-06-01), Battaglin et al.
patent: 7265498 (2007-09-01), Liu
PCT International Search Report for International Application No. PCT/US07/18308 and Written Opinion, 11 pages.
Fairchild Semiconductor Corporation
Han Jessica
Sidley Austin LLP
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