Two−Phase and Two Single−Phase Buck Regulators with SVID Interface

• Main Authors: Chun-Wei Ke, 柯雋煒
• Other Authors: 劉寅春
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/5464ns

碩士 === 淡江大學 === 電機工程學系碩士在職專班 === 106 === A three-rail buck controller with Serial VID compliant IMVP8 interface is proposed in this thesis. The controller uses differential DCR current sensing and differential voltage sensing that provide accurately adaptive voltage positioning. The controller comprises a type III frequency compensator to provide high bandwidth transient response and zero current detection of synchronous rectifier to obtain higher efficiency at light load. In this thesis, the control chip NCP81226 is used to achieve the VCORE circuit control which can improve the reliability and expandability of the system. As a result of the experimental verification, the DC gain and output voltage droop range are properly designed, and the current scale of IOUT is adjusted that can effectively improve the problem of excessive DCR tolerance of the inductor which leads to offset of the VCORE load line and current reporting error for CPU. That can further causes problems of system stability due to system performance imbalance and temperature rise.