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    23.
    发明专利
    未知

    公开(公告)号：IT1318953B1

    公开(公告)日：2003-09-19

    申请号：ITMI20002126

    申请日：2000-10-02

    Applicant: ST MICROELECTRONICS SRL

    Inventor： AIELLO NATALE ,  LA BARBERA ATANASIO ,  TORRISI GIOVANNI LUCA

    IPC: H05B39/04

    Abstract: An electronic circuit is for the gradual start-up of electric loads, particularly halogen lamps. The circuit may include a power device having an output terminal connected to the electric load and having at least one control terminal receiving a predetermined driving current value. The circuit may further include a comparator having a first input terminal coupled to the power device output and a second input terminal kept at a reference potential. The comparator output may be connected to a controlled switch inserted upstream of the control terminal to control the opening of the switch and adjust the start-up phase of the power device according to the value of the reference potential.

    24.
    发明专利
    未知

    公开(公告)号：ITMI20010075A1

    公开(公告)日：2002-07-17

    申请号：ITMI20010075

    申请日：2001-01-17

    Applicant: ST MICROELECTRONICS SRL

    Inventor： TORRISI GIOVANNI LUCA ,  TORRES ANTONINO

    IPC: H03K17/082 ,  H03K17/16 ,  H03K17/695

    Abstract: A driver circuit drives a power element connected to an inductive load. The driver circuit includes an output terminal, and a first current generator is connected between a voltage reference and the output terminal for providing a first charge current to a control terminal of the power element, which is connected to the output terminal. The driver circuit also includes a second current generator connected in parallel with the first current generator. The second current generator is connected between the voltage reference and the output terminal, and provides the control terminal with a second charge current dependent on a voltage present at the input terminal. The input terminal is connected to a conduction terminal of the power element.

    25.
    发明专利
    未知

    公开(公告)号：ITMI20002127D0

    公开(公告)日：2000-10-02

    申请号：ITMI20002127

    申请日：2000-10-02

    Applicant: ST MICROELECTRONICS SRL

    Inventor： LA BARBERA ATANASIO ,  TORRISI GIOVANNI LUCA

    IPC: H02M7/538

    Abstract: An electronic circuit is for optimizing or reducing switching losses in current-driven power devices and includes a switching power device connected to an electric load. The power devices has at least one control terminal arranged to receive a predetermined drive current value produced by a first current generator. The control terminal also receives an additional drive current portion produced by a second independent current generator. Advantageously, the electronic circuit includes a control circuit for controlling a switch connected between the second current generator and the control terminal of the switching power device during the turn-on and turn-off phases of the power device.

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