Electricity: power supply or regulation systems – For reactive power control – Using converter
Reexamination Certificate
2006-06-20
2006-06-20
Laxton, Gary L (Department: 2838)
Electricity: power supply or regulation systems
For reactive power control
Using converter
C323S222000, C323S285000
Reexamination Certificate
active
07064527
ABSTRACT:
A transition mode operating device for the correction of the power factor in switching power supply units includes a converter for receiving an input voltage and for providing a regulated output voltage, and a coupled control device. The converter includes a power transistor, a rectifier, and an inductor and auxiliary winding arranged between the rectifier and a power transistor. The control device includes a circuit for generating an error signal, a multiplier for receiving the error signal, and a driving circuit coupled to the multiplier to determine the on time period and the off time period of the power transistor. The control device includes circuitry coupled to the auxiliary winding of the inductor to generate a signal proportional to the input voltage during the on time of the power transistor and a signal representative of the current flowing through the power transistor.
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Hogan & Hartson L.L.P.
Laxton Gary L
STMicroelectronics S.R.L.
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