Transition mode operating device for the correction of the...

Details Transition mode operating device for the correction of the... Transition mode operating device for the correction of the...

2007-12-11

2007-12-11

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

For reactive power control

Using converter

C323S222000, C323S285000

Reexamination Certificate

active

11083445

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 said power transistor.

REFERENCES:
patent: 5644214 (1997-07-01), Lee
patent: 6175218 (2001-01-01), Choi et al.
patent: 6259614 (2001-07-01), Ribarich et al.
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patent: 6984963 (2006-01-01), Pidutti et al.
patent: 7064527 (2006-06-01), Adragna
patent: 1 387 476 (2004-02-01), None
Adragna; “Nicht Mehr Als Noetig Stabilisierung Eines Im Transition Mode Arbeitenden PFC-Vorreglers Hilft Strom Sparen”; Elektronik; Jul. 13, 1999; pp. 50-52,54; vol. 48, No. 14; Franzis Verlag GMBH; Munchen, DE.
Ben-Yakkov, et al. “PWM Converters with Resistive Input”; IEEE Transactions on industrial Electronics; Jun. 1, 1998; pp. 519-520; vol. 45, No. 3; IEEE Inc.; New York.
European Search Report; EP 04 42 5199; STMicroelectronics, S.R.L.; Jun. 29, 2004.

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