Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2009-04-07
2011-12-27
Vu, Bao Q (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S283000, C323S284000, C323S285000
Reexamination Certificate
active
08085021
ABSTRACT:
A switching controller for a PFC converter is provided. The switching controller comprises a switching-control circuit, a current-command circuit, a programmable feedback circuit, a modulator, an over-voltage detection circuit, and a light-load detection circuit. The switching controller is capable of regulating a bulk voltage of the PFC converter at different levels in response to load conditions of the PFC converter. A turbo current eliminates a first voltage undershooting of the bulk voltage at the transient that the bulk voltage decreases to arrive at a second level from a first level. A voltage-loop error signal is maximized to eliminate a second voltage undershooting of the bulk voltage at the transient that the bulk voltage starts to increase toward the first level from the second level.
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patent: 7030596 (2006-04-01), Salerno et al.
patent: 7800351 (2010-09-01), Gan
patent: 2008/0129265 (2008-06-01), Rosenthal
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patent: 2009/0237053 (2009-09-01), Gan
Chen Cheng-Sung
Chiang Ting-Ta
Hsu Chien-Tsun
Huang Shao-Chun
Jianq Chyun IP Office
System General Corp.
Vu Bao Q
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