A Single-Inductor Step-Up DC-DC Switching Converter With Bipolar Outputs for Active Matrix OLED Mobile Display Panels

被引：72
作者：
Chae, Chang-Seok [1 ]
Le, Hanh-Phuc [2 ]
Lee, Kwang-Chan [1 ]
Cho, Gyu-Ha [3 ]
Cho, Gyu-Hyeong [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Elect Engn & Comp Sci, Taejon 305701, South Korea
[2] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
[3] JDA Technol, Taejon 305701, South Korea
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2009年 / 44卷 / 02期
关键词：
AMOLED; bipolar output; body switching; charge pump; comparator control; current sense; DC-DC converter; single-inductor multiple-output (SIMO);
D O I：
10.1109/JSSC.2008.2010986
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 single-inductor step-up DC-DC switching converter with bipolar outputs is implemented for active-matrix OLED mobile display panels. The positive output voltage is regulated by a boost operation with a modified comparator control (MCC), and the negative output voltage is regulated by a charge-pump operation with a proportional-integral (PI) control. The proposed adaptive current-sensing technique successfully supports the implementation of the proposed converter topology and enables the converter to work in both discontinuous-conduction mode (DCM) and continuous-conduction mode (CCM). In addition, with the MCC method, the converter can guarantee a positive output voltage that has both a fast transient response of the comparator control and a small output voltage ripple of the PWM control. A 4.1 mm(2) converter IC fabricated in a 0.5 mu m power BiCMOS process operates at a switching frequency of 1 MHz with a maximum efficiency of 82.3% at an output power of 330 mW.
引用
收藏
页码：509 / 524
页数：16
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