Fully Integrated KY Converter with Optimized Reverse Current for DCM Operation

MIAO Meng-tao; FAN Shi-quan; ZHANG Ying; XUE Zhong-ming; GENG Li

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Fully Integrated KY Converter with Optimized Reverse Current for DCM Operation

更新时间：2026-09-04

- Fully Integrated KY Converter with Optimized Reverse Current for DCM Operation
- Vol. 34, Issue 4, Pages: 55-59(2017)
- 作者机构：
  
  西安交通大学微电子学院,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2017
- 稿件说明：
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苗孟涛, 范世全, 张应, 薛仲明, 耿莉. DCM反向电流优化全集成KY变换器设计[J]. 微电子学与计算机, 2017, 34(4): 55-59.

MIAO Meng-tao, FAN Shi-quan, ZHANG Ying, et al. Fully Integrated KY Converter with Optimized Reverse Current for DCM Operation[J]. 2017, 34(4): 55-59.
苗孟涛, 范世全, 张应, 薛仲明, 耿莉. DCM反向电流优化全集成KY变换器设计[J]. 微电子学与计算机, 2017, 34(4): 55-59. DOI：

MIAO Meng-tao, FAN Shi-quan, ZHANG Ying, et al. Fully Integrated KY Converter with Optimized Reverse Current for DCM Operation[J]. 2017, 34(4): 55-59. DOI：

摘要

针对一种新型升压变换器——KY变换器提出了NMOS管漏端电压采样的控制方法

通过合理设计开关管工作的时序及负反馈控制电路

达到更为准确的过零关断效果.采用标准0.18 μm CMOS工艺

完成了一款全集成KY变换器的设计

开关频率为100 MHz.仿真结果表明

变换器输入电压为1.8 V

输出电压为2.5 V

负载电流为150 mA时

变换器的峰值效率为81.3%

与常规通过检测电感电流过零点

继而关断开关管的KY变换器相比

效率提高了4.5%.

Abstract

By analyzing the topology of KY converter and the reverse current problem

a NMOS drain-voltage sampling control loop is proposed. Reasonable sequential circuit and feedback controller are designed and more accurate zero-crossing turn-off is achieved. A fully integrated 100 MHz KY converter is designed based on a standard 0.18 μm CMOS process. The simulation results show that the reverse current is reduced. The peak efficiency is 81.3% when input voltage is 1.8 V

output voltage is 2.5 V and load current is 150 mA. Improvement of 4.5% is achieved compared with other circuit which turns off the switches based on the normal zero-crossing signal of inductor current.

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references

Zeng W L, Lam C S, Zheng W M, et al. DCM operation analysis of KY converter[J]. Electronics Letters, 2015, 51(24): 2037-2039. DOI: 2037

Zhu M, Luo F L. Implementing of developed voltage lift technique on SEPIC, cuk and double-output DC-DC converters[C]//IEEE 2nd Conference on Industrial Electronics and Applications, 2007. IEEE, 2007: 674-681.

Hwu K I, Yau Y T. KY Converter and Its Derivatives[J]. IEEE Transactions on Power Electronics, 2009, 24(1): 128-137. DOI: 128

Shin H B, Park J G, Chung S K, et al. Generalized steady-state analysis of multiphase interleaved boost converter with coupled inductors[J]. IEEE Proceedings - Electric Power Applications, 2005, 152(3): 584-594. DOI: 584

Ahn Y, Nam H, Roh J. A 50-MHz fully integrated low-swing buck converter Using packaging inductors[J]. IEEE Transactions on Power Electronics, 2012, 27(10): 4347-4356. DOI: 4347

Huang C, Mok P K T. An 84.7% E100-MHzpackage bondwire-fully integrated buck converter with precise DCM operation and enhanced light-load efficiency[J]. IEEE Journal of Solid-State Circuits, 2013, 48(11): 2595-2607. DOI: 2595

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