基于DSP的DC-DC变换器PWM的设计与实现  

An Application of DSP in the Digital DC-DC Converter

作　　者：冯梦丹[1] 郭震[1] FENG Meng-dan GUO zhen(School of Electronic Information,Xi＇ an Polytechnic University,Xi＇ an 710048, China)

机构地区：[1]西安工程大学电子信息学院,陕西西安710048

出　　处：《通信电源技术》2017年第4期84-86,共3页Telecom Power Technology

摘　　要：随着数字化进程的加快,开关电源由模拟控制转向数字控制。与模拟控制相比,数字控制更稳定可靠,能采用更复杂的控制策略,便于远程监控。文章详细介绍了利用数字信号处理器(DSP)TMS320F28335实现DC/DC变换器中PWM的占空比计算、过流检测,简要描述了TMS320F28335集成的ePWM模块的工作原理,利用CCS进行编程,实现4路PWM的输出,最终通过实验验证了原理的正确性和程序的可行性。With the acceleration of the digital process,the switching mode power supply has developed from analog control to digital control.Compared with the analog control,digital control is more stable and reliable,which can adopt more complex control strategy and is useful for remote monitoring.This paper describes in detail the use of digital signal processor（DSP）TMS320F28335 DC/DC converter PWM duty cycle calculation,overcurrent detection,as well as a brief description of the TMS320F28335 integrated ePWM module,which achieves 4 outputs of the PWM through CCS programming.Finally,the correctness of the principle and the feasibility of the program are verified by experiments.

关 键 词：DSP DC/DC变换器 PWM移相 过流检测 

分 类 号：TM46[电气工程—电器]