Design and implementation of a digitally controlled single-inductor dual-output (SIDO) buck converter

作者：Tsai Chien Hung; Yang Chun Hung^*; Leng Chi Wai

来源：International Journal of Circuit Theory and Applications, 2014, 42(3): 221-237.

DOI：10.1002/cta.1844

• hybrid digital pulse width modulators (DPWM)
• time multiplexing
• digital control, single-inductor dual-output (SIDO)

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.

• 出版日期2014-3