公开(公告)号：WO2005091480A1

公开(公告)日：2005-09-29

申请号：PCT/EP2005/050848

申请日：2005-02-28

Applicant: STMICROELECTRONICS s.r.l. ,  ADRAGNA, Claudio ,  FAGNANI, Mauro ,  MORICONI, Ugo

Inventor： ADRAGNA, Claudio ,  FAGNANI, Mauro ,  MORICONI, Ugo

IPC: H02M1/00

CPC classification number: H02M1/32 ,  H02M1/4225 ,  Y02B70/126

Abstract: There is described a device for the correction of the power factor in forced switching power supplies. The device comprises a converter (20) and a control device (100) coupled with the converter (20) in order to obtain from an alternated mains input voltage (Vin) a regulated voltage (Vout) on the output terminal; the converter (20) comprises a power transistor (M) and said control device (100) comprises an error amplifier (3) having in input on the inverting terminal a signal (Vr) proportional to the regulated voltage (Vout) and on the non-inverting terminal a reference voltage (Vref). The signal (Vr) proportional to the regulated voltage is produced by a first resistance (R1) and a second resistance (R2) coupled in series to which is applied said regulated voltage (Vout); a terminal of the second resistance (R2) is connected with the inverting terminal of the error amplifier (3). The device for the correction of the power factor comprises first means (D50) positioned between the first resistance (RI) and the inverting terminal of the error amplifier (3) and second means (50) suitable for detecting the electrical connection of the first means (D50) with the output terminal of said device for the correction of the power factor and suitable for detecting an output signal (Vr2) of the second resistance (R2). The second means (50) are suitable for supplying a malfunction signal (Fault) of the device for the correction of the power factor when the second means (50) detect electric disconnection of the first means (D50) from said output terminal (Out) or when the output signal (Vr2) of the second resistance (R2) tends to zero.

Abstract translation: 描述了用于在强制开关电源中校正功率因数的装置。 该装置包括与转换器（20）耦合的转换器（20）和控制装置（100），以便从输出端子上的交流电源输入电压（Vin）获得调节电压（Vout）; 所述转换器（20）包括功率晶体管（M），并且所述控制装置（100）包括误差放大器（3），所述误差放大器（3）在反相端子上具有与调节电压（Vout）成比例的信号（Vr） - 反相端子参考电压（Vref）。 与调节电压成比例的信号（Vr）由与所述调节电压（Vout）一起施加的串联耦合的第一电阻（R1）和第二电阻（R2）产生; 第二电阻（R2）的端子与误差放大器（3）的反相端连接。 用于校正功率因数的装置包括位于误差放大器（3）的第一电阻（RI）和反相端之间的第一装置（D50）和第二装置（50），适于检测第一装置 （D50）与所述装置的输出端子进行功率因数的校正，并适于检测第二电阻（R2）的输出信号（Vr2）。 第二装置（50）适用于当第二装置（50）检测到第一装置（D50）从所述输出端子（Out）的电断开时，提供用于校正功率因数的装置的故障信号（Fault） 或者当第二电阻（R2）的输出信号（Vr2）变为零时。

公开(公告)号：WO2002060228A1

公开(公告)日：2002-08-01

申请号：PCT/IT2001/000031

申请日：2001-01-24

Applicant: STMICROELECTRONICS S.R.L.

Inventor： BORELLA, Flavia ,  MORICONI, Ugo ,  PIDUTTI, Albino ,  QUAGLINO, Roberto ,  SANDRINI, Francesca

IPC: H05B41/38

CPC classification number: H05B41/2985 ,  H05B41/382

Abstract: The present invention relates to the managing of lamp fault conditions in electronic ballasts for one or more gas discharge lamps. The method for fault management of electronic ballast for at least one gas discharge lamp comprises the steps of: preheating the lamp filaments applying a low current for a predetermined time; igniting the lamp by increasing at a predetermined rate the voltage applied up to a predetermined strike value; charaterised by monitoring the lamp current; repeating the steps of igniting the lamp and monitoring the lamp current for a predetermined numbers of times if the lamp current is over a predetermined threshold; powering the lamp at normal operating conditions.

Abstract translation: 本发明涉及一种或多种气体放电灯的电子镇流器灯管故障状况的管理。 用于至少一个气体放电灯的电子镇流器的故障管理方法包括以下步骤：在施加低电流预定时间的情况下预热灯丝; 通过以预定速率增加施加到预定冲击值的电压来点燃灯; 通过监控灯电流特性; 如果灯电流超过预定阈值，则重复点灯并监视灯电流达预定次数的步骤; 在正常工作条件下为灯供电。