摘要
该文基于40 V耐压BJT工艺,利用电荷泵原理设计了一种DC/DC电压转换的电路。该电荷泵式转换电路使用电容器完成能量的传输与电压的转换,在实际电路中由一对开关电路与一个外部电容来实现对输入电压进行反相的电路功能。仿真结果表明,该电路在工作电压为8~20 V时,可提供-19~-7 V的输出,输出电流为10 mA,在1μF负载电容的情况下,输出纹波为43 mV,该电路采用双极型工艺,具有不易产生闩锁效应的优点,在应用时,外部组件少且无需电感,并能保证纹波在合理的范围内,可广泛应用于线性器件、放大器供电、电池分配器等电路中。
In this paper,based on the 40 V withstand voltage BJT process,a DC/DC voltage conversion circuit is designed using the principle of charge pump.The charge pump converter uses a capacitor to complete energy transmission and voltage conversion,and a pair of switch circuits and an external capacitor implement the circuit function of inverting the input voltage.The simulation results show that the circuit can provide an output of-7 V to-19 V when the working voltage is 8 V to 20 V,the output current is 10 mA,and the output ripple is 43 mV under the condition of 1μF load capacitance.The circuit adopts bipolar type.The process has the advantages of not easily producing latch-up effects.In application,there are few external components and no inductance,and the ripple can be guaranteed within a reasonable range.It can be widely used in circuits such as linear devices,amplifier power supplies,and battery distributors.
作者
李文
杨发顺
马奎
LI Wen;YANG Fashun;MA Kui(College of Big Data and Information Engineering,Guizhou University,Guiyang 550025,China;Semiconductor Power Device Reliability Engineering Research Center of Ministry of Education,Guiyang 550025,China)
出处
《电子设计工程》
2022年第8期109-113,共5页
Electronic Design Engineering
关键词
BJT工艺
电荷泵
反相电路
纹波
BJT process
charge pump
inverting circuit
ripple
