Single-inductor multiple output DC-DC converter with hybrid energy transfer media

Abstract

This thesis addresses Single-Inductor Multiple Output DC-DC Converter with Hybrid Energy Transfer Me-dia topology for Active Matrix OLEDs Display. To enhance the efficiency, Hybrid Energy Transfer Media topologies are adopted. And to achieve high stability, Ripple Current Control and Current Hysteretic Control are used.

In Chapter 1, A hybrid-type Single Inductor Boost/Buck Inverting Flyback(SIBBIF) DC-DC Converter is presented. To increase the converter efficiency, a flying capacitor as well as an inductor is adopted as another energy transfer medium together with multi-level gate driver (MLGD). Besides, to enhance load transient re-sponse, hybrid fast transient control (HFTC) is adopted. The proposed chip is implemented in a $0.5-\mu m$ power BCD process and operates at 1.25 MHz with a max efficiency of 87.1% at an output power of 600 mW.

In Chapter 2, A Dual Hybrid Energy transfer media (DHE) Single-Inductor Boost-Inverting Flyback (SIBIF) DC-DC Converter is presented. To increase the converter efficiency, two flying capacitors as well as an inductor are adopted as additional energy transfer media. Furthermore, in order to remove the bifurcation problem occurring in the SIMO type converter, a Bifurcation Free Comparator (BFC) is adopted. The pro-posed chip is implemented in a $0.5-\mu m$ power BCD process and operates at 1.25 MHz with a max efficiency of 89% at an output power of 600 mW.

In Chapter 3, A new Ripple Current Controlled boost converter is presented to achieve high stability for load variation and high efficiency. A flying capacitor as well as an inductor is adopted as another energy transfer medium to increase the converter efficiency. The proposed chip is implemented in a $0.35-\mu m$ power BCD process. The transient dip voltage is 30mV with a 70mA load change, and the peak efficiency is 90% for an output power of 480mW. The maximum output power is 1.5W.

In Chapter 4, A Single-Inductor Multiple-Output switching DC-DC Converter for use in...