A high stability DC-DC Boost Converter with Ripple Current Control and capacitor-free LDOs for AMOLED display

Author

Wang, Se-Won ; Woo, Young-Jin ; Bae, Sung-Ho ; Kong, Tae-Hwang ; Cho, Gyu-Ha ; Cho, Gyu-Hyeong

Author_Institution

KAIST, Daejeon, South Korea

fYear

2011

fDate

14-16 Nov. 2011

Firstpage

41

Lastpage

44

Abstract

A new Ripple Current Controlled Boost Converter with capacitor-free LDO as a power IC for digital driving AMOLED display is presented to achieve high stability for load variation. And a flying capacitor as well as an inductor is adopted as another energy transfer medium to increase the converter efficiency. The proposed chip is implemented in a 0.35-μm power BCD process. Transient dip voltage of the proposed boost converter is 30mV with 70mA load change. A peak efficiency of 90% at an output power of 480mW is measured without LDOs. The maximum power is 1.5W.

Keywords

DC-DC power convertors; capacitors; display instrumentation; electric current control; inductors; organic light emitting diodes; power integrated circuits; stability; capacitor-free LDO; converter efficiency; current 70 mA; digital driving AMOLED display; efficiency 90 percent; energy transfer medium; flying capacitor; high stability DC-DC boost converter; inductor; load variation; low drop output; power 1.5 W; power 480 mW; power BCD process; power IC; ripple current control; size 0.35 mum; transient dip voltage; voltage 30 mV; Capacitors; Current control; Energy exchange; Inductors; Media; Organic light emitting diodes; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid State Circuits Conference (A-SSCC), 2011 IEEE Asian

Conference_Location

Jeju

Print_ISBN

978-1-4577-1784-0

Type

conf

DOI

10.1109/ASSCC.2011.6123577

Filename

6123577