摘要
针对自适应导通时间控制下的BOOST转换器在外界条件变化或者负载电流发生跳变时可能出现的异常工作状态,提出了一种提高其抗干扰能力的电路设计方案。通过在BOOST电源管理芯片的自适应导通定时器内增加一个由复位端和置位端信号同时控制的开关,增加了一条在可能出现异常情况下电容的放电通路,从而提高了电路的抗干扰能力,使得转换器能够在较短时间内恢复正常。仿真结果表明,在BOOST转换器的负载电流发生突增后,改进后的电路能够在8μs内恢复到正常的工作状态。提出的设计方案能够增强BOOST转换器的抗干扰能力,并且BOOST转换器能够在较短时间内恢复正常启动过程。
The adaptive on-time controlled boost converter may have an abnormal operating state when the external condition changes or the load current jumps.In view of this abnormal working condition,an improved optimization circuit is proposed.By adding a switch controlled by R and S simultaneously in the adaptive on-timer,a discharge path of the capacitor under abnormal conditions may be added,thereby optimizing the anti-interference ability of the whole system.The simulation results show that after the sudden increase of the load current of the BOOST converter,the improved circuit can return to the normal working state within 8μs,which proves the effectiveness of the method.In addition,the proposed design can not only enhance the anti-interference ability of the BOOST converter,but also enable the converter to complete the normal start-up process quickly.
作者
姜婵荣
柴常春
韩晨曦
JIANG Chanrong;CHAI Changchun;HAN Chenxi(School of Microelectronics,Xidian University,Xi'an 710071,China)
出处
《西安邮电大学学报》
2019年第5期53-58,共6页
Journal of Xi’an University of Posts and Telecommunications
基金
国家自然科学基金资助项目(61974116)
