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Design and implementation of a digitally controlled single‐inductor dual‐output (SIDO) buck converter
Author(s) -
Tsai ChienHung,
Yang ChunHung,
Leng ChiWai
Publication year - 2014
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.1844
Subject(s) - inductor , buck converter , digital control , buck–boost converter , pulse width modulation , controller (irrigation) , electronic engineering , voltage , computer science , engineering , electrical engineering , control theory (sociology) , control (management) , artificial intelligence , agronomy , biology
SUMMARY This paper describes design and implementation of a digitally controlled single‐inductor dual‐output (SIDO) buck converter operating in discontinuous conduction mode. This converter adopts time‐multiplexing control in providing two independent output voltages using only an inductor. The design issues of the digital controller are discussed, including static and dynamic characteristics. Implementation of the controller, a modified hybrid digital pulse width modulator and a single look‐up table are developed. The digital controller was implemented on a field‐programmable gate array‐based control board. Experimental results demonstrating system validity are presented for a SIDO buck converter with nominal 3.6 V input voltage, and the outputs are regulated at 1.8 and 2.2 V. Copyright © 2012 John Wiley & Sons, Ltd.