Patent ID: 6628106
Filing Date: 2003-09-30
Classification: H02M

Abstract:
A Multiphase DC/DC converter comprising:(a) an input node with an input voltage (Vin); (b) an output node with an output voltage (Vo); (c) a plurality of power modules each having an upper switch, a lower switch and a storage element; (d) a hysteretic comparator with an upper limit (VH) and a lower limit (VL) forming a hysteresis band around a reference voltage (Vref) thus providing an output voltage regulation loop; (e) another comparator with a threshold limit (VLT) slightly lower than the hysteretic comparator lower limit (VL); (f) a current sensing circuit that senses the current in each phase; (g) a current comparison and selection circuit providing a current sharing regulation loop; and, (h) a final stage logic circuit whereby the current sharing regulation loop is independent of the output voltage regulation loop.