Implementation of High Precision Error Amplification Scheme for AC-DC Converter
Implementation of High Precision Error Amplification Scheme for AC-DC Converter
复制标题
AC-DC变换器高精度误差放大方案的实现
DOI：
10.1109/tcsii.2021.3126166
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Quanyuan Feng
中科院分区：
文献类型：
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作者：
Qiang Wu;Xun Li;Yongyuan Li;Zhixiong Di;Quanyuan Feng
如今，对家庭自动化设备的小体积和低成本的需求越来越高。单级变换器具有结构简单、成本低、理论体积小等优点，但在低输出电压场合输出精度较差。本文提出了一种AC/DC变换器的恒压补偿电路，以提高输出精度，该电路也可用于低输出电压的BUCK AC/DC变换器。为了验证所提出的补偿方法的可行性，BUCK控制器的基础上提出的电路实现在Episil<inline-formula><tex-math notation="LaTeX">$0. 5 μ m $</tex-math></inline-formula>/40 V-HVCMOS工艺和占用的芯片尺寸为<inline-formula><tex-math notation="LaTeX">0. 99 {\times } 0. 8 $</tex-math></inline-formula>mm<sup>2</sup>。采用该电路，单级结构变换器的输出精度可达到多级结构变换器的输出精度，具有体积小、成本低的优点。测试结果表明，样机在3.3V输出时的负载调整率约为1.3%，在5V和12 V输出时的负载调整率小于0.9%。
These days, demand for small volume and low cost of the home automation device is getting higher and higher. Converter with single-stage scheme has advantages of simple structure, low cost, and small theoretical volume, but it often suffers bad output accuracy in low output voltage applications. This brief proposes a constant voltage compensation circuit for AC/DC converters to improve the output accuracy which can also be used in a BUCK AC/DC converter with low output voltage. To verify the feasibility of the proposed compensation method, a BUCK controller based on the proposed circuit is implemented in Episil <inline-formula> <tex-math notation="LaTeX">$0.5~\mu \text{m}$ </tex-math></inline-formula>/40V-HVCMOS process and occupies a die size of <inline-formula> <tex-math notation="LaTeX">$0.99{\times }0.8$ </tex-math></inline-formula> mm<sup>2</sup>. By the help of the proposed circuit, the output accuracy of the prototype with single-stage structure, which has advantages of small volume and low cost, can reach as high as those converters with multi-stage structure. Test results show that the load regulation of the prototype is about 1.3% with 3.3V output and less than 0.9% with 5V and 12V outputs.