Design of A Programmable Digital Controller System on Chip for Switching Converters

A programmable digital controller for DC-DC switching converters has the advantages of strong versatility and high stability. In this paper, a programmable System on Chip (SoC) of digital controller is designed for applying to more switching converters topologies. Based on ARM Cortex-M0 processor, this digital controller SoC includes three error amplifying analog-to-digital converters (EADC) with 6 bits, four DPWMs with 250ps resolution, three PID control loops, and some digital peripherals that can achieve real-time monitoring, peripheral configuration, and management communication functions. Fabricated in a 110nm CMOS process. The experimental results show that by reasonably configuring the parameters of the registers, this chip can control a full bridge converter to achieve the design requirements, which proved strong versatility of this chip.