基于峰值电流模控制的浮动栅驱动电路  

A Self-Scaling Gate Drive Circuit Based on Peak-Current Mode

作　　者：寇武杰 罗萍[1] 周才强 胡永贵[2] 王育新[2] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家实验室,成都610054 [2]中国电子科技集团公司第二十四研究所,重庆400060

出　　处：《微电子学》2017年第3期383-387,共5页Microelectronics

基　　金：国家自然科学基金资助项目(61274027);模拟集成电路重点实验室基金资助项目(9140C090113150C09043)

摘　　要：设计了一种基于峰值电流模控制的浮动栅驱动电路,包括浮动栅宽电路和浮动栅压电路。电感电流的峰值由误差放大器的输出电压决定,不需要额外的负载电流信息进行浮动栅控制。可以根据负载电流的大小自适应调节功率管的栅宽和栅压,使效率得到优化。仿真结果表明,在1 MHz开关频率、5V输入、0.8V输出的双N管Buck变换器中,采用浮动栅驱动控制的Buck变换器与普通的Buck变换器相比,在轻载情况下最多可达到10%的效率提升。A self-scaling gate drive circuit based on the peak-current mode control was presented. Both the gate driving voltage and the gate width could be adjusted automatically. Because the peak current in the inductor of the peak-current mode control was subject to the output of the error amplifier, an extra detecting signal of the load current was unnecessary. The gate widths and the gate driving voltages could be adjusted adaptively with the change of load current to optimize the efficiency. Simulation results showed that the efficiency of the Buck converter that was adopting the proposed self-scaling gate drive circuit with double N-type transistors was improved by 10% in light load compared with the normal ones when the Buck converter operated in 5 V input, 0.8 V output and 1 MHz switching frequency.

关 键 词：峰值电流模 浮动栅驱动 高效率 

分 类 号：TN433[电子电信—微电子学与固体电子学]