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

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 eff...

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Bibliographic Details
Main Authors: Se-Won Wang, Young-Jin Woo, Sung-Ho Bae, Tae-Hwang Kong, Gyu-Ha Cho, Gyu-Hyeong Cho
Format: Conference Proceeding
Language:English
Subjects:
Capacitors
Current control
Energy exchange
Inductors
Media
Organic light emitting diodes
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Summary: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.
DOI:10.1109/ASSCC.2011.6123577