公开(公告)号：EP1650857A3

公开(公告)日：2007-05-16

申请号：EP05109431.6

申请日：2005-10-11

Applicant: STMicroelectronics S.r.l.

Inventor： Adragna, Claudio ,  Fagnani, Mauro ,  Gattavari, Giuseppe

IPC: G05F1/70 ,  H02M1/00

CPC classification number: H02M1/4225 ,  H02M2001/0022 ,  H02M2001/0025 ,  Y02B70/126

Abstract: The present invention describes is a device for power factor correction in forced switching power supply unit, comprising a converter (20) and a control device (100) coupled with the converter (20) so as to obtain from an input alternating mains voltage (Vin) a direct regulated voltage (Vout) on the output terminal. The converter (20) comprises a power transistor (M) and the control device (100) comprises an error amplifier (3) having in input on the inverting terminal a first signal (Vr) proportional to the regulated voltage (Vout) and on the non-inverting terminal a reference voltage (Vref), a drive circuit (4-7, 10) of the power transistor (M) coupled with the output terminal of the error amplifier (3). The control device (100) comprises means (42, Cff, 101, Rt, 102) suitable for generating a current signal (It) representative of the effective input voltage; said current signal (It) is in input on the inverting terminal of said error amplifier (3) to vary said regulated voltage (Vout) in reply to variations of the effective input voltage.

公开(公告)号：EP1134881B1

公开(公告)日：2006-01-04

申请号：EP00830202.8

申请日：2000-03-17

Applicant: STMicroelectronics S.r.l.

Inventor： Gattavari, Giuseppe ,  Adragna, Claudio ,  Fagnani, Mauro

IPC: H02M3/335

CPC classification number: H02M3/335 ,  Y10S323/901

公开(公告)号：EP1387477A1

公开(公告)日：2004-02-04

申请号：EP02425510.1

申请日：2002-08-01

Applicant: STMicroelectronics S.r.l.

Inventor： Fagnani, Mauro ,  Pidutti, Albino ,  Adragna, Claudio

IPC: H02M1/12

CPC classification number: H02M1/4225 ,  Y02B70/126

Abstract: A device for the correction of the power factor in power supply units with forced switching operating in transition mode is described. The device comprises a converter (20) and a control device (100) coupled to said converter so as to obtain from an alternating network input voltage (Vin) a regulated output voltage (Vout) on the output terminal. The converter (20) comprises a power transistor (M) and the control device (100) comprises a pilot circuit (51) suitable for determining the period of switched-on time (Ton) and the period of switched-off time (Toff) of said power transistor (M) and control means (50) coupled to said pilot circuits (51) and with said converter and which are capable of prolonging said period of switched-on time (Ton) of the power transistor (M) at the instants of time in which the alternating network voltage (Vin) substantially assumes the value zero.

Abstract translation: 描述用于在转换模式下强制切换操作的电源单元中功率因数校正的装置。 该装置包括转换器（20）和耦合到所述转换器的控制装置（100），以便从输出端子上的交变网络输入电压（Vin）获得稳定的输出电压（Vout）。 转换器（20）包括功率晶体管（M），并且控制装置（100）包括适于确定接通时间（Ton）的周期和关断时间（Toff）的周期的导频电路（51） 所述功率晶体管（M）和与所述导频电路（51）和所述转换器耦合的所述功率晶体管（M）和控制装置（50）能够延长所述功率晶体管（M）的所述接通时间（Ton） 交变网络电压（Vin）基本上呈现零值的时刻。