Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2005-11-07
2008-03-11
Patel, Rajnikant B. (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S282000, C363S065000
Reexamination Certificate
active
07342383
ABSTRACT:
A multi-phase regulator that provides a smooth transition between DCM and CCM by employing partially synchronous rectification in which a duty cycle of a synchronous switch enable signal is gradually increased to 100%. The regulator includes a separate inductor, high-side switch, and synchronous switch for each phase. The high-side switches are controlled based on a separate PWM signal for each phase. Each PWM signal is provided by pulse width modulating the error signal, with each of the PWM signals having a different phase. During the partially synchronous rectification, the synchronous switch turns on when the high-side switch is off and the synchronous switch enable signal is asserted, and the synchronous switch is off otherwise. The synchronous switch enable signal has a frequency relative to the frequency of each of the pulse width modulation output signal such that good current sharing among the inductors of each phase is achieved.
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Mei Tawen
Song Chunping
Darby & Darby P.C.
Gaffney Matthew M.
Patel Rajnikant B.
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