Abstract:
A compressor control device includes a driving circuit, for controllably supplying a coil of an electric motor of a compressor. A temperature sensor is thermally coupled to the driving circuit and provides a temperature sensing signal correlated to a temperature in the driving circuit. A control stage, coupled to the driving circuit and to the temperature sensor, selectively prevents the driving circuit from supplying the coil, in response to a minimum temperature increment being detected by the temperature sensor within a pre-determined control time window.
Abstract:
A switch including a first transistor including a first main terminal connected to a first switch node, a second main terminal connected to a second switch node and a control terminal, the second switch node being connected to a first clean voltage supply, and first control circuitry connected to the control terminal of the first transistor, including a first node connected to the first clean voltage supply, a second node connected to a second voltage level, and a control input node for receiving a first input control signal variable between a supply voltage level and a third voltage level, the first control means arranged to selectively connect the control terminal of the first transistor to one of the first node and the second node based on the first input control signal.
Abstract:
A logic level converter includes two first electronic switches coupled in a bi-stable flip-flop arrangement having at least one output line, and a forcing circuitry including two second electronic switches to force switching of the first electronic switches in the flip-flop arrangement. The forcing circuitry has an input terminal to receive a logic input signal having a given level to produce switching of the flip-flop arrangement and generate at the output line(s) of the flip-flop arrangement, a logic output signal(s) whose voltage level is converted with respect to the level of the logic input signal. The converter includes, interposed between each of the two first electronic switches in the flip-flop arrangement and a respective one of the second electronic switches in the forcing circuitry, at least one respective cascode electronic switch to limit the voltage across the two first electronic switches in the flip-flop arrangement.
Abstract:
An electronic integrated device may include a signal generation stage arranged to generate a first signal representative of an under voltage lockout logic signal. The signal generation stage may include a voltage divider block arranged to provide an internal reference voltage signal to a bandgap core group based upon a reference signal. The bandgap core group may generate the first signal based upon the internal reference voltage signal. The bandgap core group may further include a first generation module arranged to generate a output regulated reference voltage signal based upon the internal reference voltage signal, and a second generation module arranged to generate the first signal based upon the internal reference voltage signal and a driving signal obtained by a preliminary processing of the internal reference voltage signal by a bandgap core module included within the band gap core group.
Abstract:
An embodiment of the invention relates to a voltage converter for supplying a semiconductor light source and having at least an input terminal connected to a power supply reference, namely an AC mains voltage reference, and an output terminal providing a current signal to said semiconductor light source, the converter being also connected to a voltage reference and comprising at least a step-down block inserted between a switching node and to the output terminal and connected to the voltage reference and an input block connected to the input terminal, as well as to a first input node and to a first output node of a control circuit, in turn connected to the switching node and to the voltage reference. The input block is a pre-regulator input block and comprises at least a switching component connected to the input terminal and to a capacitive block, in turn inserted between a second input node of the control circuit and the voltage reference, such a switching component having a control terminal connected to the first output node.
Abstract:
A startup circuitry connected to a main circuit which has at least an output terminal connected to its feedback terminal by a feedback loop. The startup circuitry is connected to the main circuit in such a manner to break the feedback loop, by having a first circuit node connected to said output terminal of said main circuit and a second circuit node connected to its feedback terminal, said startup circuitry providing a correct output voltage value during the startup phase of said main circuit.
Abstract:
A circuit including a first sensitive node, a first component connected between the first sensitive node and a first terminal of a first switch, said first switch controlled by a first control signal variable between a supply voltage level and a second voltage level, and a second switch including a first terminal connected to the first terminal of said first switch, and a second terminal connected to a clean voltage supply, said second switch controlled to connect the first node of said first switch to said clean voltage supply when said first switch is in a non-conducting state.