STM32F103和TPS65251的多电源时序控制电路  

Multi-power Supply Sequence Controlling Circuit Based on STM32F103 and TPS65251

作　　者：郑郁[1] Zheng Yu(GUODIAN NANJING AUTOMATION CO.,LTD.,Nanjing 210037,China)

机构地区：[1]国电南京自动化股份有限公司,南京210037

出　　处：《单片机与嵌入式系统应用》2018年第12期29-32,共4页Microcontrollers & Embedded Systems

摘　　要：基于STM32F103和TPS65251设计的多电源时序控制电路可以实现多路电源的上下电顺序控制功能。交流输入电源经过波形整理后接入STM32F103的ADC,程序采用了改进型的方均根算法计算有效值,使得计算精度误差小于0.5%。在12V大于80%额定值时,依次拉高TPS65251的EN引脚完成上电控制,在交流电源有效值小于80%额定值时延200ms后,依次拉低TPS65251的EN引脚完成下电控制。详细介绍了控制电路的软硬件设计方法并提供了试验波形。The multi-power supply controlling circuit based on STM32F103 and TPS65251 can implement the sequence requirement.The AC supply waveform-conditioned is linked to STM32F103’s ADC.Its RMS is calculated by an advanced root-mean-square algorithm,its relative error is less than 0.5%.STM32F103 implement power-on sequence controlling by setting TPS65251’s EN pin after 12V is more than 80%rate value,and implement power-off sequence controlling by clearing TPS65251’s EN pin after AC supply is less than 80%rate value and delayed 200 ms.The hardware design and software design of the controlling circuit and the experimental waves are introduced in detail.

关 键 词：STM32F103 TPS65251 上下电时序控制 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]