单片机控制系统开关电源接地问题研究

Research on grounding of switching power supply in single-chip control system

讨论了开关电源可能对单片机控制系统产生的不利影响并针对不同的干扰途径提出了切断共模回路、滤除差模噪音的解决措施来消除开关电源干扰。最后,通过实例分析说明了单片机控制系统和开关电源采用上述措施,适当、可靠地接地后能提高单片机控制系统的抗干扰能力。

This paper mainly discusses switching power supply has possible side-effects on in single-chip control system and puts forward the countermeasures that cutting off the common noise circuit and filtering the differential noise to remove interference. In the end, an example is taken to explain the anti-interfere ability of single-chip control system and switching power source can be strengthened when take the proposed measures and reliable grounding.