공학기술논문지 (Journal of Advanced Engineering and Technology)
- 제5권4호
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- Pages.349-353
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- 2012
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- 2005-3142(pISSN)
마이크로프로세서 제어를 이용한 DC-DC Buck Converter 설계
Design of DC-DC Buck Converter Using Micro-processor Control
- Jang, In-Hyeok (Korea Testing Certification) ;
- Han, Ji-Hun (Korea Testing Certification) ;
- Lim, Hong-Woo (Korea Testing Certification)
- 투고 : 2012.10.26
- 심사 : 2012.12.15
- 발행 : 2012.12.31
초록
Recently, Mobile multimedia equipments as smart phone and tablet pc requirement is increasing and this market is also being expanded. These mobile equipments require large multi-media function, so more power consumption is required. For these reasons, the needs of power management IC as switching type dc-dc converter and linear regulator have increased. DC-DC buck converter become more important in power management IC because the operating voltage of VLSI system is very low comparing to lithium-ion battery voltage. There are many people to be concerned about digital DC-DC converter without using external passive device recently. Digital controlled DC-DC converter is essential in mobile application to various external circumstance. This paper proposes the DC-DC Buck Converter using the AVR RISC 8-bit micro-processor control. The designed converter receives the input DC 18-30 [V] and the output voltage of DC-DC Converter changes by the feedback circuit using the A/D conversion function. Duty ratio is adjusted to maintain a constant output voltage 12 [V]. Proposed converter using the micro-processor control was compared to a typical boost converter. As a result, the current loss in the proposed converter was reduced about 10.7%. Input voltage and output voltage can be displayed on the LCD display to see the status of the operation.