电子元件与材料2024，Vol.43Issue(6)：701-707,7.DOI:10.14106/j.cnki.1001-2028.2024.0078
一种自适应恒定平均电压输出电路设计
An adaptive constant average voltage output circuit
摘要
Abstract
In order to solve the problem of low efficiency of LDO and peripheral capacitors or inductors of DC-DC in the electronic igniter applications,an adaptive constant average voltage output circuit was proposed.The circuit output produced a PWM wave and a constant average voltage output was achieved by automatically adjusting the duty cycle of the PWM wave in response to variations in the power supply voltage.The average output voltage can be adjusted by changing the proportion of the external sampling resistors.The circuit is operated in open-loop with simple and feasible feature,and no close-loop stability consideration is needed.Meanwhile,it achieves high efficiency that comparable with DC-DC,but without peripheral inductors and capacitors,so the integration and miniaturized applications was facilitated.The circuit was designed with 0.18 μm BCD process.The simulation and test results show that under the power supply voltage of 3.2-4.2 V,a constant average output voltage can be achieved with an error of less than±1%;By changing the sampling resistance ratio,the average output voltage can be continuously adjusted within 1.5-3.6 V.关键词
恒定平均电压/自适应占空比/PWM/开环控制/无片外电感电容Key words
constant average voltage/adaptive duty cycle/PWM/open-loop control/capacitance-and-inductance-free分类
信息技术与安全科学引用本文复制引用
李琴鹏,孙江,左世柱,李征洋,罗章成..一种自适应恒定平均电压输出电路设计[J].电子元件与材料,2024,43(6):701-707,7.基金项目
国家自然科学基金(62174139) （62174139）
