Fuzzy logic peak current-mode control for DC-DC converters using an inexpensive 8-bit microcontroller

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Described in this paper are the design and implementation of a microcontroller-based fuzzy logic peak current-mode controller (PCMC) for dc-dc converters. A fuzzy logic PCMC boost converter operating in the continuous conduction mode has been designed using an 8-bit microcontroller. A one-chip solution has been achieved. No complex algorithm is required to estimate the controlled current by using the on-board peripherals of the microcontroller. The fuzzy logic algorithm uses a rule-based description of converter operation. By using rule-based look-up tables and other techniques, the fuzzy logic algorithm is implemented on the low-cost microcontroller successfully. Experimental results indicate successful operation of the microcontroller-based fuzzy logic PCMC power converter system.