Abstract:
A multichannel electronic-ignition control device, including a control circuit (10) and a plurality of driving stages (8), connected to the control circuit (10) and each having a respective high-voltage terminal (11a), for driving an inductive load (3, 3a); the control circuit (10) is provided with a plurality of control stages (17, 18), integrated in a single semiconductor body (16) and connected each to the high-voltage terminal (11a) of a respective driving stage (8).
Abstract:
The present invention relates to a circuit (20) for dynamic control of a power transistor in applications for high voltage and of the type wherein a power transistor (TR1) has a conduction terminal (C) connected to a load and a control terminal (G1) receiving a driving signal from a driver block (4) activated by a trigger signal (Vin) received on a circuit input terminal (IN1). Advantageously, the circuit (20) comprises a JFET component (TR2) inserted between the conduction (C) and control (G1) terminal of the power transistor (TR1) and equal to a resistance with non-linear feature. Moreover, the JFET component (TR2) is monolithically integrated in the structure of said power transistor (TR1).
Abstract:
The integrated power device (100) comprises a power transistor (2) made up of a first diode (25) and a second diode (26) which are connected together in series between a collector region (6) and emitter-contact region (14) of the power transistor (2) and define a common intermediate node (24). The power device (100) also comprises a control circuit (3) including a high-voltage region (30) bonded on the emitter-contact region (14) by means of an adhesive layer (108), and biasing means (109, 110, 111) connected between the common intermediate node (24) and the high-voltage region (30). The biasing means (109, 110, 111) comprise a contact pad (109) electrically connected to the common intermediate node (24), an electrical connection region (111) which is in electrical contact with the high-voltage region (30), and a wire (110) having a first end soldered on the contact pad (109) and a second end soldered on said electrical connection region (111).
Abstract:
A control circuit (6) for an electronic driving device (9) of inductive loads is described, comprising at least a control block (1, 10) activated by a trigger signal (V TRIGGER ) having at the high logic state non optimal voltage values and output-connected to a control terminal of a power element (TR1) of the electronic driving device (9). The control circuit also comprises an auxiliary current generator (A) capable of delivering a current (I AUX ) to be added to the current (I DRIV ) outputted by said control block (1, 10) to supply a driving current I GATE .
Abstract:
A power IGBT device is described being monolithically integrated and comprising an input terminal (I10) suitable to receive an input voltage (Vin) and an output terminal (O10) suitable to supply a current (Iout) with limited and predetermined highest value. Such IGBT device comprising an IGBT power element (2) inserted between said output terminal (O10) and a supply reference (GND) and having a control terminal (15) connected to the input terminal (110) by means of a control circuit (12) comprising at least a transistor (18) inserted between the control terminal (15) and the supply reference (GND) and a resistive element (Rc) inserted between the input terminal (I10) and the control terminal (15).
Abstract:
A thermal control circuit for an integrated power transistor comprises a current generator, controlled by a turn on signal, a sensing resistance in series to the power transistor, a current limiter acting when the voltage drop on the sensing resistance overcomes a certain value, a current amplifier coupled to the output node of the controlled current generator, outputting a drive current that is injected on a control node of the power transistor, and a soft thermal shut down circuit whose conduction state is enhanced as the temperature increases for reducing the drive current. The circuit controls the voltage on the power transistor in a more effective manner than known devices because the current amplifier has a variable gain controlled by the state of conduction of the soft thermal shut down circuit. The improvement substantially consists in reducing progressively the gain of the current amplifier as the temperature of the integrated circuit increases, until a thermal equilibrium is reached.