Design Of Digital Power Control Chip With Configurable DPID

In recent years,digital power systems have developed rapidly and are widely used in communications,transportation,and aviation.Compared with the analog power system,it has the advantages of high efficiency,strong portability,and flexible control mode.Digital power systems have shown many advantages and have been the focus of research and development in industry and academia at home and abroad.The digital power system includes an analog-to-digital converter(ADC),a DPID(Digital Proportion Integral Differential),and a digital pulse width modulation(DPWM).Among them,the ADC converts the analog output voltage into a digital signal,and the DPID performs system loop compensation.The DPWM converts the compensated digital signal into a square wave signal with a certain duty cycle to control the conduction and cutoff of the power tube.In this paper,the digital control power converter is modeled in the discrete domain,and a complete digital control power converter behavior model is built in the Simulink simulation environment.Among them,the DPID compensator plays a vital role in the digital power supply,and its performance determines the stability of the digital power system.In this paper,a digital compensator based on Pseudo Type-?(PT3)compensation is proposed.The digital compensator converts the transfer function in the continuous domain to the discrete domain by the bilinear transformation method for digital control of Buck Converter.The digital Pseudo Type-?(DPT3)compensator compensates for the system by constructing a dual signal path to generate additional zeros.At the same time,the complexity of the digital compensator is reduced.In addition,the internal intercept bits of the DPT3 compensator are precisely designed to improve the stability of the system.Finally,the system is simulated in the Simulink environment to verify the correctness of the DPT3 compensator design.This paper verifies the digital power system based on the FPGA development board.The results show that the system function is correct and the verification result is good.In addition,a digital programmable power controller chip is designed in 0.18?m CMOS process,including output sampling and quantization module,CPU,DPID and DPWM modules.The system was simulated based on AMS hybrid simulation software.The results show that the output voltage and inductor current can be quickly stabilized when the load is stepped.Finally,the tape verification is performed,in which the layout of the digital module is generated by automatic place and route.