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http://dx.doi.org/10.21289/KSIC.2019.22.3.373

Analysis of a Buck DC-DC Converter for Smart Electronic Applications  

Kang, Bo-gyeong (Dept. of Nanosciences and Engineering, Inje University)
Na, Jae-Hun (Gimhae industry promotion&bio-medical foundation)
Song, Han-Jung (Dept. of Nanosciences and Engineering, Inje University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.22, no.3, 2019 , pp. 373-379 More about this Journal
Abstract
Nowadays, the IoT portable electronic devices have become more useful and diverse, so they require various supply voltage levels to operate. This paper presents a DC-DC buck converter with pulse width modulation (PWM) for portable electronic devices. The proposed step-down DC-DC converter consists of passive elements such as capacitors, inductors, and resistors and an integrated chip (IC) for signal control to reduce power consumption and improves ripple voltage with the resolution. The proposed DC-DC converter is simulated and analyzed in PSPICE circuit design platform, and implemented on the prototype PCB board with a Texas Instruments LM5165 IC. The proposed buck converter is showed 92.6% of peak efficiency including a load current range of 4-10 mA, 3.29 mV of the voltage ripple at 5 V output voltage for the supply voltage 12 V. Measured and Simulated power efficiency are made good agreement with each other.
Keywords
circuit design; PWM; buck converter; dc-dc converter; SPICE; Regulation; Measurement;
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