首页|期刊导航|半导体学报（英文版）|Monolithic quasi-sliding-mode controller for SIDO buck converter with a self-adaptive free-wheeling current level
半导体学报（英文版）2013，Vol.34Issue(1)：100-106,7.DOI:10.1088/1674-4926/34/1/015007
Monolithic quasi-sliding-mode controller for SIDO buck converter with a self-adaptive free-wheeling current level
Monolithic quasi-sliding-mode controller for SIDO buck converter with a self-adaptive free-wheeling current level
摘要
Abstract
An analog implementation of a novel fixed-frequency quasi-sliding-mode controller for single-inductor dual-output (SIDO) buck converter in pseudo-continuous conduction mode (PCCM) with a self-adaptive freewheeling current level (SFCL) is presented.Both small and large signal variations around the operation point are considered to achieve better transient response so as to reduce the cross-regulation of this SIDO buck converter.Moreover,an internal integral loop is added to suppress the steady-state regulation error introduced by conventional PWM-based sliding mode controllers.Instead of keeping it as a constant value,the free-wheeling current level varies according to the load condition to maintain high power efficiency and less cross-regulation at the same time.To verify the feasibility of the proposed controller,an SIDO buck converter with two regulated output voltages,1.8 V and 3.3 V,is designed and fabricated in HEJIAN 0.35 μm CMOS process.Simulation and experiment results show that the transient time of this SIDO buck converter drops to 10 μs while the cross-regulation is reduced to 0.057 mV/mA,when its first load changes from 50 to 100 mA.关键词
DC-DC converter/fast-response/sliding mode control/single-inductor dual-output/PCCMKey words
DC-DC converter/fast-response/sliding mode control/single-inductor dual-output/PCCM引用本文复制引用
Wu Xiaobo,Liu Qing,Zhao Menglian,Chen Mingyang..Monolithic quasi-sliding-mode controller for SIDO buck converter with a self-adaptive free-wheeling current level[J].半导体学报（英文版）,2013,34(1):100-106,7.基金项目
Project supported by the National Natural Science Foundation of China (No.60906012) and the Analog Devices,Inc.(ADI). （No.60906012）
