Design of low EMI and high efficiency BUCK converter based on frequency jittering technology

被引：0

作者：

Ning K. ^{[1
]}

Liu R. ^{[1
]}

Dai L. ^{[1
]}

Sun H. ^{[1
]}

机构：

[1] Information College, North China University of Technology, Beijing

来源：

Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2022年 / 50卷 / 03期

关键词：

Alterable threshold; Bandgap reference; BUCK converter; Electromagnetic interference (EMI); Frequency jitter; High efficiency; Oscillator;

D O I：

10.13245/j.hust.220302

中图分类号：

学科分类号：

摘要：

A low electromagnetic interference (EMI), high efficiency BUCK and low area consumption converter chip based on frequency jittering technology was presented. In the frequency jittering oscillator, an amplifying and sampling circuits were adopted to change the voltage of oscillator capacitor effectively and achieved less capacitor application, which can effectively reduce the area of the integration capacitor, especially it reduced the electromagnetic interference and solved the EMI problem. Meanwhile, it optimized the circuits in this chip and improved efficiency. Finally, it was implemented in 0.35 μm BCD (binary-coded decimal) process. And the measurement results are bellows, in the condition of the radiated emission test according to CISPR 25 ALSE method, the maximum value of EMI peak value and average value is 30 and 20 dB·μV respectively with the frequency range between 30~1 000 MHz, and are far below the limitation of CISPR 25 ALSE, furthermore, it achieves a high efficiency of 95%. © 2022, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.

引用

页码：7 / 11

页数：4

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