The FPGA device is an IC that can be programmable by software, to implement any logical function. Its inner architecture offers possibility to execute complex algorithms, even some parts running in parallel, improving law control dynamics. In consequence, the FPGA can control power electronics converters successfully. The several segments of the converter control are connected and synchronized by a state machine. Thus, this paper proposes a design of a synchronous state machine to control a PFC boost converter with FPGA. The communication between FPGA and ADC is implemented by SPI communication. The controllers and PWM modulator are build in FPGA to control the converter. Experimental results show the mains signals of state machine and also the boost converter in operation.