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http://dx.doi.org/10.6109/jkiice.2008.12.3.517

A DC-DC Converter Design for OLED Display Module  

Lee, Tae-Yeong (창원대학교 전자공학과)
Park, Jeong-Hun (창원대학교 전자공학과)
Kim, Jeong-Hoon (창원대학교 전자공학과)
Kim, Tae-Hoon (창원대학교 전자공학과)
Vu, Cao Tuan (창원대학교 전자공학과)
Kim, Jeong-Ho (덴소풍성전자)
Ban, Hyeong-Jin (덴소풍성전자)
Yang, Gweon (덴소풍성전자)
Kim, Hyoung-Gon (덴소풍성전자)
Ha, Pan-Bong (창원대학교 전자공학과)
Kim, Young-Hee (창원대학교 전자공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.12, no.3, 2008 , pp. 517-526 More about this Journal
Abstract
A one-chip DC-DC converter circuit for OLED(Organic Light-Emitting Diode) display module of automotive clusters is newly proposed. OLED panel driving voltage circuit, which is a charge-pump type, has improved characteristics in miniaturization, low cost and EMI(Electro-Magnetic Interference) compared with DC-DC converter of PWM(Pulse Width Modulator) type. By using bulk-potential biasing circuit, charge loss due to parasitic PNP BJT formed in charge pumping, is prevented. In addition, the current dissipation in start-up circuit of band-gap reference voltage generator is reduced by 42% and the layout area of ring oscillator is reduced by using a logic voltage VLP in ring oscillator circuit using VDD supply voltage. The driving current of VDD, OLED driving voltage, is over 40mA, which is required in OLED panels. The test chip is being manufactured using $0.25{\mu}m$ high-voltage process and the layout area is $477{\mu}m{\times}653{\mu}m$.
Keywords
DC-DC Converter; OLED(Organic Light-Emitting; Diode); Charge Pumping; Automotive; BGR;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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