High-capacity DC-DC converters for active matrix OLED display

Seok Lee, Jayang Yoon, Jaehoon Kim, Changsuk Lee, Hawoong Jung, Jaeshin Lee, Joongho Choi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations


Two DC-DC converters for bipolar outputs is implemented which are suitable for large-size AM-OLED (Active-Matrix Organic Light Emitting Diode) display. The positive output voltage is regulated by a buck DC-DC converter, and the negative one is regulated by a inverting buck-boost DC-DC converter. Both DC-DC converters operate in a current mode in order to enhance the transient responses. The improved discrete-mode detection circuit is proposed to achieve high-efficiency and accurate output voltages when converters operate in discontinuous-conduction mode. Compensation blocks such as artificial ramp and PI-compensator are incorporated for maintaining stability. The DC-DC converters are fabricated in a 0.35-um BCD technology. For typical operating conditions, maximum efficiencies of buck and inverting buck-boost converters are 92% and 83.1%, respectively.

Original languageEnglish
Title of host publicationProceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
Number of pages4
StatePublished - 2010
Event2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 - Kuala Lumpur, Malaysia
Duration: 6 Dec 20109 Dec 2010

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS


Conference2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
CityKuala Lumpur


  • DC-DC Buck Converter
  • DC-DC Buck-Boost Converter
  • Discrete-Mode Detection


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