摘要
针对传统开关电源精度低、效率低以及自适应能力差的问题,设计了一种基于LM5715电压转换器和DSP数字信号处理器的新型Buck-Boost电路。LM5715在降压和升压模式下均采用电流模式控制,以实现出色的负载和线路调节。DSP处理器通过内部PWM电路实现四个开关管的导通控制,开关频率由外部电阻器进行反馈控制。仿真结果表明,相比于传统的升压降压变换器,所设计的变换器具有较宽范围的输入电压、稳定的输出电压以及较高的电源转化效率,具有较好的实用性。
Aiming at the low precision,low efficiency and poor adaptive ability of traditional switching power supply,a new Buck-Boost circuit based on LM5715 voltage converter and DSP digital signal processor was designed.The LM5715 adopts current mode control in both buck and boost modes for excellent load and line adjustment.The DSP processor achieved the on-off control of four switching tubes through the internal PWM circuit,and the switching frequency is controlled by the feedback from an external resistor.The simulation results show that the designed converter has a wide range of input voltage,stable output voltage and higher power conversion efficiency and has better practicality compared with the traditional step-up and step-down converter.
作者
陈张景宣
王峰
姚晓磊
CHEN-ZHANG Jingxuan;WANG Feng;YAO Xiaolei(School of Electronic and Information Engineering,Ningbo University of Technology,Ningbo,Zhejiang,315211,China)
出处
《宁波工程学院学报》
2020年第3期14-19,共6页
Journal of Ningbo University of Technology
