Title :
On-chip boost DC-DC converter in color OLED driver & controller ICs for mobile application
Author :
Ge, Ding ; Chen, Zhiliang
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing
Abstract :
On-chip boost DC-DC converter used in color OLED driver and controller ICs for mobile application is presented in this paper. For special systematic requirement, current-limited pulse-frequency modulation (PFM) control scheme is used. This converter is designed with 0.35mum 1P4M high-voltage CMOS process. Experimental results show that, the converter can operate with supply voltage from 2.5 to 4.2V, which is suitable for single-cell lithium-ion rechargeable battery supply application, and boost voltage up to 12~18V for illuminating OLED display pixels. The output ripple voltage is about 250mV with 6.8muF off-chip capacitor and 10muH off-chip inductor. The power efficiency is over 75% for 1~300mA load current, maximum to 87% at about 200mA load current
Keywords :
CMOS integrated circuits; DC-DC power convertors; driver circuits; organic light emitting diodes; pulse frequency modulation; 0.35 micron; 2.5 to 4.2 V; 250 mV; 300 mA; 6.8 muF; color OLED driver; controller IC; high voltage CMOS process; mobile application; on-chip boost DC-DC converter; pulse frequency modulation; single-cell lithium-ion rechargeable battery; Batteries; CMOS process; Capacitors; Control systems; DC-DC power converters; Flat panel displays; Inductors; Organic light emitting diodes; Pulse modulation; Voltage;
Conference_Titel :
ASIC, 2005. ASICON 2005. 6th International Conference On
Conference_Location :
Shanghai
Print_ISBN :
0-7803-9210-8
DOI :
10.1109/ICASIC.2005.1611357
