Embedded fuzzy control on monolithic dc/dc converters

Several fuzzy control applications have been proposed for nonlinear control of nonlinear power supply devices. Some control problems in fact will arise in DC/DC converters due to their intrinsic nonlinear nature and, in some case, of instabilities and tendency to oscillate, lying with some particular topologies. The work presented reports a monolithic approach implementing an embedded fuzzy controller within classical DC/DC converter boost topology, with current-mode direct PWM control. It will be demonstrated, as well, how the proposed approach will solve the intrinsic instability of such topology, when acting under continuous operating mode. Finally the IC implementation will be briefly introduced, referring to ST mixed technology.