Digital power source based on PMBus

Abstract

The invention discloses a digital power source based on PMBus. The digital power source comprises a main circuit power circuit and a digital control management unit. The digital control management unit comprises a PMBus digital controller, an ADC sampling conditioning circuit, a processor and a display terminal. The PMBus digital controller is connected with the main circuit power circuit and used for controlling the output voltage of the main circuit power circuit. The ADC sampling conditioning circuit is used for sampling the input voltage, the input current, the output voltage and the output current of the main circuit power circuit, and the ADC input voltage, the ADC input current, the ADC output voltage and the ADC output current are obtained respectively. The processor is used for transmitting the information of the ADC input voltage, the ADC input current, the ADC output voltage and the ADC output current to the display terminal. The digital power source is accurate in output voltage control, timely in fault signal response and capable of monitoring and controlling the input and output voltage and current, the temperature and the working state.

Description

technical field [0001] The invention belongs to the field of digital power supplies, and more specifically relates to a PMBus-based digital power supply. The digital power supply adopts a PMBus bus digital controller and can stably input high-frequency power. Background technique [0002] At present, the vast majority of digital power supplies usually use solutions such as DSP, DSP and FPGA, ARM and CPLD to realize the control and management of the power supply system. DSP has software flexibility and is mainly used to complete functions such as data acquisition, control algorithm operation and data monitoring communication; FPGA has high hardware integration, high reliability, high speed and powerful parallel processing capabilities, and can be used for high-precision PWM output . The basic principle of digital power supply is: the A / D sampling unit of DSP or ARM converts the collected power supply voltage and current signals into digital signals, and sends them to the DSP...

AI Technical Summary

Problems solved by technology

[0004] For the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a high-frequency power digital power supply based on the PMBus bus, wherein by improving its key process structure such as digital compensation methods, compared with the prior art It can effectively solve the problems of inaccurate output voltage control and untimely response to fault signals; and the PMBus bus digital controller communicates with the processor (MCU, ARM or DSP, etc.) Status Monitoring and Control

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