Inverting Buck-Boost DC-DC Converter for Mobile AMOLED Display Using Real-Time Self-Tuned Minimum Power-Loss Tracking (MPLT) Scheme With Loss less Soft-Switching for Discontinuous Conduction Mode

被引:18
作者
Hong, Sung-Wan [1 ,2 ]
Park, Sang-Hui [1 ]
Kong, Tae-Hwang [1 ]
Cho, Gyu-Hyeong [1 ]
机构
[1] Korea Adv Inst Sci & Technol, Taejon 305701, South Korea
[2] Samsung Elect Co Ltd, Gyeonggi Do 443742, South Korea
关键词
DC-DC power conversion; inverting buck-boost converter; minimum power-loss tracking; negative voltage generator; real-time operation;
D O I
10.1109/JSSC.2015.2450713
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A DC-DC converter, which tracks minimum power loss under various conditions, is presented in this paper. With this DC-DC converter, a new approach for optimum efficiency, which implements theoretical equations intactly at the circuit level, was adopted. This approach has high reliability against process variation. The concept of lossless soft-switching was also adopted in discontinuous-conduction-mode (DCM) operation. The proposed DC-DC converter has a maximum power efficiency of 91% at the switching frequency of 1 MHz. The proposed converter is able to maintain a maximum power efficiency of around 90% over the whole range of input voltage from 2.9 to 4.5 V and output voltage from -3.8 to -5.9 V. This chip is implemented in a 0.35 pm BCD process and occupies an area of 2.1x 1.4 mm(2).
引用
收藏
页码:2380 / 2393
页数:14
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