Title :
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
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;
Conference_Titel :
Solid State Circuits Conference (A-SSCC), 2011 IEEE Asian
Conference_Location :
Jeju
Print_ISBN :
978-1-4577-1784-0
DOI :
10.1109/ASSCC.2011.6123577
