摘要:
A protection device for a converter includes at least one power switch that operates for a first time period from the time the overload or short-circuit in the converter has been detected. The protection device includes circuitry to control the power switch to minimize the power deliverable by the converter for a second time period from the end of the first operating time period, as well as circuitry to shut down the converter after the second time period.
摘要:
Control device for a switching converter structure comprising at least a first and a second interleaved converter, wherein the control device is configured to designate one converter as master and at least the other converter as slave, to set a time delay of the operating cycle of the slave converter and to synchronize the master and the at the least one slave converter.
摘要:
A protection device for a converter includes at least one power switch that operates for a first time period from the time the overload or short-circuit in the converter has been detected. The protection device includes circuitry to control the power switch to minimize the power deliverable by the converter for a second time period from the end of the first operating time period, as well as circuitry to shut down the converter after the second time period.
摘要:
Control device for a switching converter structure comprising at least a first and a second interleaved converter, wherein the control device is configured to designate one converter as master and at least the other converter as slave, to set a time delay of the operating cycle of the slave converter and to synchronize the master and the at the least one slave converter.
摘要:
A protection device protects a driving device of an electric motor with at least three phases and at least three windings and the driving device comprises a power stage suitable for driving directly said at least three windings. The driving device is suitable for actuating a motor brake operating phase and comprises detectors suitable for detecting the currents that run in the windings of the motor. The protection device comprises selectors suitable for selecting the currents having a single direction between said detected currents and a deactuator suitable for deactuating the power stage during said motor brake operating phase when the sum of the currents having a single direction is greater than a reference current.
摘要:
An electronic comparator circuit having a high speed during switch phase and combining the advantages of bipolar technology with those of CMOS technology. The circuit consists of a differential stage input circuit having a differential pair of bipolar transistors forming its outputs. The output stage contains a pair of MOS transistors having gate electrodes in common. The pair of MOS transistors is connected on one side to the outputs of the input portion and on the other side to a positive supply pole via a current mirror circuit. The output contains another pair of MOS transistors with gate electrodes in common connected between the out puts of the input portion and ground. The drain electrode of the first pair of MOS transistors forms the output for the comparator.
摘要:
The device and method monitor the current delivered to a load through a power transistor including a sense transistor. The circuit includes a disturbances attenuating circuit that has a differential stage, and first, second and third stages referenced to ground, the respective input nodes of which are connected in common to an output node of the differential stage. The third stage is formed by a transistor identical to a transistor of the first stage and delivers a current signal through a current terminal thereof, proportional to the current being delivered to the load.
摘要:
The invention relates to a structure for and the method of manufacturing a driver circuit for an inductive load monolithically integrated on a semiconductor substrate doped with a first type of doping agent and on which is grown an epitaxial well having a second type of doping agent. An insulated well doped with the same type of doping agent as the substrate, which houses at least one power transistor of the driver circuit, is provided within the epitaxial well. The epitaxial well also houses a first and a second active area which house the cathode terminal and anode terminal of a protection diode, respectively.
摘要:
The invention relates to a charge-pump control circuit for a power transistor including a driver circuit connected to a first supply voltage through a diode and to a second voltage through a switch and a first load. The driver circuit is connected to the power transistor, and the power transistor is linked to a pump capacitor. The power transistor is connected between a further supply voltage and a second load. The control circuit of the invention further includes a control logic circuit connected between the first supply voltage and the second voltage. The control logic circuit is connected to the driver circuit and to the switch, and the switch is connected between the power transistor and the first load. The switch is also connected to the driver circuit, and to a circuit for checking the charged state of the pump capacitor which is connected between the switch and the control logic circuit.
摘要:
A protection device protects a driving device of an electric motor with at least three phases and at least three windings and the driving device comprises a power stage suitable for driving directly said at least three windings. The driving device is suitable for actuating a motor brake operating phase and comprises detectors suitable for detecting the currents that run in the windings of the motor. The protection device comprises selectors suitable for selecting the currents having a single direction between said detected currents and a deactuator suitable for deactuating the power stage during said motor brake operating phase when the sum of the currents having a single direction is greater than a reference current.