Title :
Design of a step-down DC-DC Converter for mobile LED applications
Author :
Wonkyeong Park ; Van Ha Nguyen ; Huynsik Son ; Minji Lee ; Hanjung Song ; Namtae Kim
Author_Institution :
Dept. of Nano Syst. Eng., Inje Univ., Gimhae, South Africa
Abstract :
In this paper, a step-down converter for mobile LED applications is proposed. The converter which is operated with 4 MHz high switching frequency is capable of reducing mounting area of passive devices. It consists of a power stage and a control block. The power stage is composed of inductor, output capacitor, MOS transistors and feedback resistors, meanwhile, the control block consists of a pulse width modulator, an error amplifier and an oscillator etc. The proposed step-down converter has been designed and verified with a 0.35 /an 1-poly 4-metal BCD process technology. Simulation results show an output voltage of 1.8 V and output current of 100 mA for an input voltage of 3.7 V. The output current capability of the proposed converter is higher compared to the conventional 500 kHz driven converter (25~50 mA) with the duty ratio of 0.4.
Keywords :
BIMOS integrated circuits; DC-AC power convertors; circuit simulation; integrated circuit design; light emitting diodes; passive networks; 1-poly 4-metal BCD process technology; MOS transistors; control block; current 100 mA; error amplifier; feedback resistors; frequency 4 MHz; high switching frequency; inductor; mobile LED applications; oscillator; output capacitor; passive devices; power stage; pulse width modulator; size 35 mum; step-down DC-DC converter; voltage 1.8 V; voltage 3.7 V; Capacitors; Inductors; Light emitting diodes; Mobile handsets; SPICE; Simulation; Switches; BCD process; DC-DC Converter; Frequency; Switching regulator;
Conference_Titel :
Signal Processing, Communication and Computing (ICSPCC), 2013 IEEE International Conference on
Conference_Location :
KunMing
DOI :
10.1109/ICSPCC.2013.6664071
