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    34.
    发明专利
    未知

    公开(公告)号：DE602005019590D1

    公开(公告)日：2010-04-08

    申请号：DE602005019590

    申请日：2005-12-02

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CANNELLA ELIANA ,  ADRAGNA CLAUDIO ,  MARINO FILIPPO ,  TUMMINARO SALVATORE

    IPC: H02M1/38 ,  H02M3/337

    Abstract: Described herein is a device for driving a converter circuit that supplies a charge via a first electronic switch (LS) and a second electronic switch (HS) alternately turned on and off, with a first dead-time interval between turning-off of the first electronic switch and turning-on of the second electronic switch (HS) and a second dead-time interval between turning-off of the second electronic switch (HS) and turning-on of the first electronic switch. Turning-off of the second electronic switch (HS) is controlled as a function of a feedback signal (F) coming from the load (L). The device comprises: - a generator module (11a, C) for generating a memory signal (V c ), indicating the duration of the first dead-time interval; and - a delay module (11b, C, 14, 18, 20), sensitive to said memory signal (V c ) for controlling turning-on of the first electronic switch with a delay, with respect to turning-off of the second electronic switch (HS), identified by the aforesaid memory signal (V C ), so that the second dead-time interval has a duration substantially equal to the duration of the first dead-time interval.

    35.
    发明专利
    未知

    公开(公告)号：DE602004013717D1

    公开(公告)日：2008-06-26

    申请号：DE602004013717

    申请日：2004-03-22

    Applicant: ST MICROELECTRONICS SRL

    Inventor： ADRAGNA CLAUDIO ,  MORICONI UGO

    IPC: G05F1/70 ,  H02M1/00 ,  H02M1/12 ,  H02M1/42 ,  H02M3/335

    Abstract: A transition mode operating device for the correction of the power factor in switching power supply units is described. Said device comprises a converter (20) and a control device (100) coupled to the converter (20) for obtaining from an input network alternated voltage (Vin) a regulated voltage (Vout) at the output terminal. The converter (20) comprises a power transistor (M), a circuit (2) adapted to rectifier said network voltage, an inductor arranged between the rectifier circuit (2) and a non drivable terminal of said power transistor (M), said device for the correction of the power factor comprising an auxiliary winding (L1) of the inductor. The control device (100) comprises first means (3) having in input a first signal (Vr) proportional to said regulated voltage (Vout) and a reference signal (Vref) and being adapted to generate an error signal (Se), a multiplier (4) having in input said error signal (Se) and a driving circuit (70) having in input at least a second signal in output from the multiplier (4) and being adapted to determine the on time period (Ton) and the off time period (Toff) of the power transistor (M). The control device (100) comprises second means (50) connected with said auxiliary winding (L1) of the inductor and adapted to generate at least a third signal (Vm) proportional to the network voltage (Vin) during the on time of said power transistor (M); the third signal (Vm) is in input to said multiplier (4) for generating the second signal (Vc).

    36.
    发明专利
    未知

    公开(公告)号：IT1318239B1

    公开(公告)日：2003-07-28

    申请号：ITMI20001692

    申请日：2000-07-25

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MORICONI UGO ,  ADRAGNA CLAUDIO

    IPC: H02M3/155 ,  H03K17/06

    Abstract: Disclosed is a bootstrap circuit in DC/DC static converters having the characteristic of comprising a fixed frequency signal, a recharge circuit of a capacitor and current generator means, said generator means controlled so as to emit current pulses, in synchrony with said fixed frequency signal, of a predetermined duration, every time that charge accumulated by said capacitor goes below a predetermined level.

    Steuerverfahren und Vorrichtung für quasiresonanten Sperrwandler mit hohem Leistungsfaktor
    37.
    发明专利
    Steuerverfahren und Vorrichtung für quasiresonanten Sperrwandler mit hohem Leistungsfaktor 未知

    公开(公告)号：DE102015012768A1

    公开(公告)日：2016-06-16

    申请号：DE102015012768

    申请日：2015-09-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： ADRAGNA CLAUDIO ,  GRITTI GIOVANNI

    IPC: H02M1/42 ,  H02M3/335

    Abstract: Die vorliegende Offenbarung richtet sich auf einen quasiresonanten Wandler mit hohem Leistungsfaktor. Der Wandler wandelt eine Eingabe von einer Wechselstromleitung in eine Gleichstromausgabe, um eine Last, im Allgemeinen eine Kette von LED, mit Energie zu versorgen. Die Energieeingabe wird einem von einem Leistungsschalter gesteuerten Transformator zugeführt. Der Leistungsschalter wird von einer Steuereinrichtung mit einer Formungsschaltung getrieben. Die Formungsschaltung verwendet einen Stromgenerator, einen geschalteten Widerstand und einen Kondensator, um ein sinusförmiges Bezugsspannungssignal zu erzeugen. Die Steuereinrichtung treibt den Leistungsschalter auf der Grundlage des Spannungsbezugssignals, was zu einem sinusförmigen Eingangsstrom in eine Primärwicklung des Transformators führt, was zu einem hohen Leistungsfaktor und einer geringen gesamten harmonischen Verzerrung für den Wandler führt.

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