中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

17 records (took 0.022 seconds)

    11.
    发明专利
    未知

    公开(公告)号：DE69814073D1

    公开(公告)日：2003-06-05

    申请号：DE69814073

    申请日：1998-09-23

    Applicant: ST MICROELECTRONICS SRL

    Inventor： SPAMPINATO SERGIO TOMMASO ,  TAGLIAVIA DONATO ,  TORRES ANTONINO

    IPC: H02M3/335 ,  H02M3/338

    Abstract: A flyback DC-DC converter, autooscillating in a quasi resonant manner (QRC) during steady state operation, employing a flyback transformer for storing and transferring energy to a load having an auxiliary winding (AUS) whose voltage is compared by a comparator (COMP1) with a threshold (VREF1) to detect its crossing and as a consequence switch on through a control flip-flop (FF) a power transistor (POWER) driving the primary winding of said transformer for a new phase of conduction and accumulation of energy, whose duration is established by a secondary control loop of the output voltage (ERROR AMP, CONTROL) producing the switching off of the power transistor for a successive energy transfer phase toward the load of the energy stored in the transformer during the preceding conduction phase, has a wholly integrated control circuit that comprises a second comparator (HVCOMP) of the voltage existing on the current terminal of said power transistor (POWER) connected to the primary winding of the transformer in respect to the ground potential of the circuit; a logic gate (OR) having a first input connected to the output of said second comparator (HVCOMP) and an output coupled to the set terminal of said control flip-flop (FF); a delay network (ON DELAY) coupled in cascade to the output of said first comparator (COMP1) and having an output coupled to a second input of said logic gate (OR), so that under steady state functioning conditions of the converter, the setting of the flip-flop (FF) is done by said second comparator (HVCOMP) rather than by said first comparator (COMP1).

    13.
    发明专利
    未知

    公开(公告)号：DE60015711T2

    公开(公告)日：2005-11-24

    申请号：DE60015711

    申请日：2000-01-27

    Applicant: ST MICROELECTRONICS SRL

    Inventor： TORRES ANTONINO

    IPC: F02P17/12

    Abstract: The electronic ignition device (50) comprises: an ignition coil (2) having a primary winding terminal (5) and a secondary winding terminal (6) generating a spark; a power element (3) arranged between the primary winding terminal (5) and ground (GND); a protection circuit (11) issuing a disable signal to the control terminal (8) of the power element (3) in preset conditions; and a voltage limiting circuit (51) having inputs (54, 55) connected to the primary winding terminal (5) and to the battery voltage (VB), and an output (56) connected to the control terminal (8) of the power element (3). The voltage limiting circuit (51) detects a potential difference between its own inputs (54, 55) and supplies to the control terminal (8) an activation signal for the power element (3), in presence of the deactivation signal and when the potential difference exceeds the supply voltage (VB) by a preset value. Thereby, the voltage limiting circuit (51) limits the voltage on the primary winding terminal (5) to a preset value (VL) which depends upon the value of the battery voltage (VB).

    15.
    发明专利
    未知

    公开(公告)号：IT1319736B1

    公开(公告)日：2003-11-03

    申请号：ITMI20002867

    申请日：2000-12-29

    Applicant: ST MICROELECTRONICS SRL

    Inventor： TORRES ANTONINO

    IPC: H02M1/00 ,  H02M1/32 ,  H03K17/16

    Abstract: A driver circuit drives a power element connected to an inductive load. The driver circuit includes an input terminal coupled to a control terminal of the power element through a trigger block, and a voltage regulator block having a circuit node coupled to a first supply voltage reference, as well as to a second supply voltage reference through a capacitor. A voltage comparator stage includes an operational amplifier having an inverting input connected to the circuit node and a non-inverting input is connected directly to a terminal of the power element, such as to the emitter terminal thereof. The operational amplifier also includes an output connected to the control terminal of the power element.

    16.
    发明专利
    未知

    公开(公告)号：ITMI20002867A1

    公开(公告)日：2002-07-01

    申请号：ITMI20002867

    申请日：2000-12-29

    Applicant: ST MICROELECTRONICS SRL

    Inventor： TORRES ANTONINO

    IPC: H02M1/00 ,  H02M1/32 ,  H03K17/16

    Abstract: A driver circuit drives a power element connected to an inductive load. The driver circuit includes an input terminal coupled to a control terminal of the power element through a trigger block, and a voltage regulator block having a circuit node coupled to a first supply voltage reference, as well as to a second supply voltage reference through a capacitor. A voltage comparator stage includes an operational amplifier having an inverting input connected to the circuit node and a non-inverting input is connected directly to a terminal of the power element, such as to the emitter terminal thereof. The operational amplifier also includes an output connected to the control terminal of the power element.

Patent Agency Ranking