System and method for digital control of a DC/DC power-converter device, in particular for automotive applications

申请公布号：: EP2388902(A1)
申请号：: EP20100425172
申请日期：: 2010.05.21
申请公布日期：: 2011.11.23
申请人：: C.R.F. SOCIETA CONSORTILE PER AZIONI
发明人：: REGGIO, PAOLO;CATONA, GIUSEPPE
分类号：: H02M3/335;H02M3/337
主分类号：: H02M3/335
摘要：: <p>A system for controlling a power-converter device (1) of a DC/DC type, having an input (IN1, IN2) connected to a first electric battery (2) at an input voltage (Vin), and an output (OUT1, OUT2) connected to a second electric battery (8) at an output voltage (Vout), and being provided with: a transformer stage (5), with a primary winding (5a) coupled to the input, and a secondary winding (5b, 5c) coupled to the output; a switching stage (4), arranged between the input and the primary winding and supplying an alternating electrical quantity to the primary winding as a function of the input voltage (Vin); a rectifier stage (6, 7) arranged between the secondary winding and the output for generating the output voltage (Vout). A control stage (14) switching controls the switching stage (4) at a switching frequency (fc), as a function of a measurement signal ( Vout , Iout ) indicative of an electrical output quantity (Vout, Iout), by means of a digital average-current-mode control, obtaining the measurement signal by means of a subsampling of the electrical output quantity, at a sampling frequency (fs), lower than the switching frequency (fc).</p>