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    22.
    发明专利
    未知

    公开(公告)号：DE602004013716D1

    公开(公告)日：2008-06-26

    申请号：DE602004013716

    申请日：2004-03-22

    Applicant: ST MICROELECTRONICS SRL

    Inventor： ADRAGNA CLAUDIO

    IPC: G05F1/70 ,  H02M1/00 ,  H02M1/12 ,  H02M1/42 ,  H02M5/42

    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 (101) 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 (101) 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 (101) 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) and at least a fourth signal (Vint) representative of the current flowing through said power transistor (M); said third signal (Vm) is in input to said multiplier (4) for generating the second signal (Vc) and said fourth signal (Vint) is in input to said driving circuit (70).

    23.
    发明专利
    未知

    公开(公告)号：DE60225603D1

    公开(公告)日：2008-04-24

    申请号：DE60225603

    申请日：2002-07-19

    Applicant: ST MICROELECTRONICS SRL

    Inventor： FAGNANI MAURO ,  PIDUTTI ALBINO ,  ADRAGNA CLAUDIO

    IPC: H02M1/00 ,  H02M1/36 ,  H02M3/335

    Abstract: A bootstrap circuit for switching power supplies (SMPS), a switching power supply including a bootstrap circuit, and an integrated circuit of a switching power supply, are provided. The bootstrap circuit ( 13 ) for switching power supplies includes a first supply voltage (Vin) coming from a first terminal and a second supply voltage (Vcc) coming from a second terminal and a third terminal ( 30 ). The bootstrap circuit includes: a first current path between the first terminal and the third terminal ( 30 ); a second current path between the first terminal and the second terminal; a third current path between the second terminal and the third terminal ( 30 ); and a two-way voltage regulator (M 3 , Dz 2 , R 5 , R 6 ) placed along the second current path.

    24.
    发明专利
    未知

    公开(公告)号：DE60025324D1

    公开(公告)日：2006-03-30

    申请号：DE60025324

    申请日：2000-03-17

    Applicant: ST MICROELECTRONICS SRL

    Inventor： GATTAVARI GIUSEPPE ,  ADRAGNA CLAUDIO ,  FAGNANI MAURO

    IPC: H02M3/335

    Abstract: A method and a circuit for disabling a converter while allowing its self-recovery, the converter circuit comprising a transformer (T1) provided with an auxiliary winding (L1) self-supplying, after start-up, an integrated circuit (IC) containing the programming, driving, controlling and protecting circuitry of the converter, a start-up circuit directly connected to a power source, a rectifying circuit (D1, C1) of the voltage induced in the auxiliary winding (L1), supplying through a voltage regulator stage (R1, Z1, T1) the integrated circuit at a regulated voltage (Vreg), at least an external line comprising a sensor of an electrical or physical quantity to be monitored (NTC, Rs), biased to a reference voltage, functionally coupled to a disable input pin (A-REC) of the integrated circuit for disabling it when a certain threshold value is surpassed. The method consists in using the regulated self-supply voltage of the converter (Vreg) as biasing voltage of the external sensor line and as reference voltage of an hysteresis comparator monitoring the signal representing the monitored quantity produced an the external sensor line. Upon the switching of the hysteresis comparator the integrated converter circuit (IC) is turned off and the limiting value of the rectified voltage (Vcc) self-supplying the integrated converter circuit (IC) is markedly reduced by short-circuiting to ground a portion (Z4, Z5) of a sectionable voltage clamp chain (Z2, Z3, Z4, Z5) coupled between the output (Vcc) of the rectifying circuit (D1, C1) and a common ground node of the circuit.

    BOOTSTRAP CIRCUIT FOR SWITCHING POWER SUPPLIES
    25.
    发明专利
    BOOTSTRAP CIRCUIT FOR SWITCHING POWER SUPPLIES 未知

    公开(公告)号：AU2002326145A1

    公开(公告)日：2004-02-09

    申请号：AU2002326145

    申请日：2002-07-19

    Applicant: ST MICROELECTRONICS SRL

    Inventor： FAGNANI MAURO ,  PIDUTTI ALBINO ,  ADRAGNA CLAUDIO

    IPC: H02M1/00 ,  H02M1/36 ,  H02M3/335

    Abstract: A bootstrap circuit for switching power supplies (SMPS), a switching power supply including a bootstrap circuit, and an integrated circuit of a switching power supply, are provided. The bootstrap circuit ( 13 ) for switching power supplies includes a first supply voltage (Vin) coming from a first terminal and a second supply voltage (Vcc) coming from a second terminal and a third terminal ( 30 ). The bootstrap circuit includes: a first current path between the first terminal and the third terminal ( 30 ); a second current path between the first terminal and the second terminal; a third current path between the second terminal and the third terminal ( 30 ); and a two-way voltage regulator (M 3 , Dz 2 , R 5 , R 6 ) placed along the second current path.

    Steuerverfahren und Vorrichtung, die Primärseitenregelung in einem quasiresonanten Wechselstrom/Gleichstrom-Sperrwandler anwenden
    29.
    发明专利
    Steuerverfahren und Vorrichtung, die Primärseitenregelung in einem quasiresonanten Wechselstrom/Gleichstrom-Sperrwandler anwenden 未知

    公开(公告)号：DE102015012614A1

    公开(公告)日：2016-06-16

    申请号：DE102015012614

    申请日：2015-09-29

    Applicant: ST MICROELECTRONICS SRL

    Inventor： GRITTI GIOVANNI ,  ADRAGNA CLAUDIO

    IPC: H02M1/42 ,  H02M3/335 ,  H05B44/00

    Abstract: Die vorliegende Offenbarung richtet sich auf einen primär-gesteuerten quasiresonanten Wandler mit hohem Leistungsfaktor. Der Wandler wandelt eine Eingabe von einer Wechselspannungsleitung in eine Gleichstromausgabe, um eine Last, im Allgemeinen eine Kette von LED, mit Energie zu versorgen, und kann mit Phasenanschnitt-Dimmern kompatibel sein. 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 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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