Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-10-04
2009-12-01
Laxton, Gary L (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S222000, C323S225000, C323S271000
Reexamination Certificate
active
07626372
ABSTRACT:
A switching control circuit for multi-phases PFC converters is provided. It includes a PFC-control circuit coupled to receive a first-inductor signal and a feedback signal for generating a first-switching signal. The first-switching signal is utilized to switch the first inductor for power factor correction. A phase-detection circuit detects the first-switching signal and a second-inductor signal for generating a start signal and a phase-lock signal. The start signal is developed to enable a second-switching signal. The second-switching signal is coupled to switch a second inductor. An on-time-adjust circuit is coupled to adjust the on time of the second-switching signal in accordance with the phase-lock signal. The phase-lock signal is correlated to the period between the end of the second-inductor signal and the start of the second-switching signal.
REFERENCES:
patent: 5565761 (1996-10-01), Hwang
patent: 7078884 (2006-07-01), Miura et al.
patent: 7116090 (2006-10-01), Yang et al.
patent: 2007/0109825 (2007-05-01), Qiu et al.
patent: 2007/0145956 (2007-06-01), Takeuchi
Laxton Gary L
Quddus Nusrat J
System General Corporation
Thomas Kayden Horstemeyer & Risley
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