Patent ID: 8199532
Filing Date: 2012-06-12
Classification: H02M

Abstract:
1. A voltage converter comprising: a voltage-transformer having a primary side, designed to receive an input voltage and a secondary side, designed to supply an output voltage; a control-switch coupled to said primary side; and a control circuit, coupled to a control terminal of said control-switch and designed to control switching thereof as a function of a feedback signal correlated to said output voltage; said control circuit having a sampling stage, designed to sample and hold said feedback signal and to supply a sampled signal, and an averager stage, connected to the output of said sampling stage and designed to implement a filtering of said sampled signal; wherein said averager stage comprises a switched-capacitor filter, provided with a filter switch, an RC-series stage, and a pulse generator, designed to control closing of said filter switch for a given duration; said RC-series stage having a respective time constant that is greater than or equal to said given duration by at least four times.