APPARECCHIATURA ELETTRONICA COMPRENDENTE UNO STADIO DI USCITA DI TIPO SWITCHING, DISPOSIZIONE CIRCUITALE E PROCEDIMENTO CORRISPONDENTI

An electronic apparatus (10; 20) comprising a switching-type output power stage (14), in particular of a full-bridge or half-bridge type, which receives on an input of its own a driving signal (PWM_in; PWM_out) pulsed between two electrical levels and supplies at output an output power signal (PWM_p...

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Bibliographische Detailangaben
Hauptverfasser:	RAIMONDI, Marco, GONANO, Giovanni
Format:	Patent
Sprache:	ita
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	An electronic apparatus (10; 20) comprising a switching-type output power stage (14), in particular of a full-bridge or half-bridge type, which receives on an input of its own a driving signal (PWM_in; PWM_out) pulsed between two electrical levels and supplies at output an output power signal (PWM_pow),said electronic apparatus (10; 20) comprising:a modulator circuit (11) which carries out a pulse modulation, in particular a pulse-width modulation (PWM) and is configured for converting a continuous or digital electrical input signal (Vi) into an input signal (PWM_in) pulsed between two electrical levels, having a mean value proportional to the amplitude of the input signal (Vi); anda circuit arrangement (17; 27; 37; 37') for controlling saturation of an output signal (Vout) supplied by the switching-type output power stage (14),wherein:said circuit arrangement comprises a pulse-remodulator circuit (17; 27; 37; 37'), which is set between the output of the modulator circuit (11) and the input of the switching-type output power stage (14) and is configured for supplying on an output of its own, as driving signal (PWM_out) to the switching-type output power stage (14), a respective modulated signal (PWM_out) pulsed between two electrical levels, said pulse-remodulator circuit (17; 27; 37; 37') being configured for:measuring a pulse width (Win, Lin) as pulse time interval (Win, Lin) elapsing between two consecutive pulsed-signal edges of the pulsed input signal (PWM_in); andif said measurement of the pulse width (Win, Lin) indicates that the latter is below a given minimum value (Wmin, Lmin), remodulating said pulsed input signal (PWM_in), imposing equality between a pulse width (Wout, Lout) of the output pulsed signal (PWM_out) and said value of minimum width (Wmin, Lmin) and imposing equality between a value of modulation index (Dout) of the output signal (PWM_out) and a value of modulation index (Din) of the input signal (PWM_in), applying a lengthening of the output period (Tout).