Buck型DC/DC转换器自适应斜坡补偿电路设计  

Design of a Self-adaptable Slope Compensation Circuit for Buck DC-DC Converter

作　　者：何均[1] 

机构地区：[1]西安电子科技大学电路CAD研究所,陕西西安710071

出　　处：《电子科技》2015年第3期126-128,共3页Electronic Science and Technology

摘　　要：提出了一种可提高Buck型DC/DC转换器带载能力的斜坡补偿设计。针对电流模DC/DC转换器在大占空比下的不稳定性,以及采用斜坡补偿后系统带载能力下降等问题,通过产生分段线性斜坡补偿信号,既保证了系统的稳定性,又提高了系统的带载能力。该电路基于0.5μm CMOS工艺设计,经Cadence仿真验证,达到了设计目标。A novel slope compensation technique is presented to improve the loading capacity of buck DC/DCconverters. To solve problems such as inherent instability of DC/DC converters at large duty cycle and its decreasedloading capacity as a result of traditional slope compensation, a piecewise linear slope compensation circuit is de-signed, which improves both stability and loading capacity of the system. Based on a 0. 5 μm CMOS process, thecircuit is verified by Cadence simulation. Anticipated results have been achieved.

关 键 词：电流模 DC/DC转换器 斜坡补偿 带载能力 

分 类 号：TN86[电子电信—信息与通信工程]