中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

13 records (took 0.019 seconds)

    1.
    发明专利
    未知

    公开(公告)号：ITMI20002125A1

    公开(公告)日：2002-04-02

    申请号：ITMI20002125

    申请日：2000-10-02

    Applicant: ST MICROELECTRONICS SRL

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

    IPC: H05B41/285

    Abstract: An electronic thermal protection circuit is for high currents which can occur in the start-up phase in lighting converters. The circuit is associated with a power device having an output terminal connected to an electric load and at least one control terminal receiving a predetermined driving current value by a driving circuit portion. Advantageously, an integrated temperature sensor is provided to detect the temperature of the power device, and an output stage is connected downstream of the sensor to switch off the driving circuit portion when a predetermined operation temperature is exceeded.

    2.
    发明专利
    未知

    公开(公告)号：IT1318952B1

    公开(公告)日：2003-09-19

    申请号：ITMI20002125

    申请日：2000-10-02

    Applicant: ST MICROELECTRONICS SRL

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

    IPC: H05B41/285

    Abstract: An electronic thermal protection circuit is for high currents which can occur in the start-up phase in lighting converters. The circuit is associated with a power device having an output terminal connected to an electric load and at least one control terminal receiving a predetermined driving current value by a driving circuit portion. Advantageously, an integrated temperature sensor is provided to detect the temperature of the power device, and an output stage is connected downstream of the sensor to switch off the driving circuit portion when a predetermined operation temperature is exceeded.

    3.
    发明专利
    未知

    公开(公告)号：ITMI20002127A1

    公开(公告)日：2002-04-02

    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.

    4.
    发明专利
    未知

    公开(公告)号：ITMI20002125D0

    公开(公告)日：2000-10-02

    申请号：ITMI20002125

    申请日：2000-10-02

    Applicant: ST MICROELECTRONICS SRL

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

    IPC: H05B41/285

    Abstract: An electronic thermal protection circuit is for high currents which can occur in the start-up phase in lighting converters. The circuit is associated with a power device having an output terminal connected to an electric load and at least one control terminal receiving a predetermined driving current value by a driving circuit portion. Advantageously, an integrated temperature sensor is provided to detect the temperature of the power device, and an output stage is connected downstream of the sensor to switch off the driving circuit portion when a predetermined operation temperature is exceeded.

    7.
    发明专利
    未知

    公开(公告)号：ITMI20010261A1

    公开(公告)日：2002-08-09

    申请号：ITMI20010261

    申请日：2001-02-09

    Applicant: ST MICROELECTRONICS SRL

    Inventor： LA BARBERA ATANASIO ,  RANDAZZO VINCENZO

    IPC: H05B41/282 ,  H05B41/295 ,  H05B41/298

    Abstract: Herein described is a driver circuit of a fluorescent lamp having a first and a second electrode and igniting when the voltage between the first and second Electrode exceeds a given threshold voltage. The driver circuit comprises an inductance coupled to a supply voltage and to a terminal of the first electrode a first condenser coupled to the other terminal of the first electrode and to a terminal of the second electrode, a control device comprising a first and a second system of switches capable of guaranteeing oscillations of a voltage signal on the inductance and on the first condenser up to the ignition of the lamp. The driver circuit comprises a device associated to the control device and capable of acting on the first system of switches so as to regulate the frequency of the oscillations from a frequency greater than the resonance frequency of the inductance and of the first condenser to the same resonance frequency so as to guarantee a preheating of the first and second electrodes. The device is sensitive to the depletion of gas of the lamp and is capable of sending a turn-off signal to the control device.

    8.
    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.

    9.
    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.

Patent Agency Ranking