Study On A High Precision Programmable Digital Power Supply

This paper narrates the design theory and realization of high-precision programmable digital power supply based on the digital signal processor TMS320LF2407. Based on the switch direct current supply circuit, combining the high-efficiency with the high-precision data collection ability and high speed data process ability of DSP system, this paper takes on proper control arithmetic to stablize and adjust the power supply and realize the mini-step increasing and high precision outputting. Further more, the power supply has the self-protect ability, artificial fan control scheme and network instrument ability, etc.The paper introduces the collectivity design scheme, explicitly expatiates the construction of high-efficiency direct current power supply basing on the DSP TMS320LF2407. and the paper presents the theory of improved PID control arithmetic and the result of emulation, and the paper introduce the means to improve the stability and precision.In the end, the paper mensurates the primary parameter of high-precision programmable digital power supply. And it confirmed that the system has reached the anticipating objective and forecasts the prospect.