An Optimized On-Chip Boost-Type DC-DC Converter With an On-Board Inductance

The rapid development of portable electronic products in recent years increases demands of varied displays. With resolutions of panel sizes and pixels under current drive capability improved, this study is intended for designing an inductive DC boost converter circuit for displays, which is fully integrated with IC fabrication technology [1][2]. Most of current displays employ capacitances for voltage-boosting to supply relative high-voltage biases to displays. These booster circuits are in small sizes and with high efficiency, but limited output currents, which are inadequate for some of large-sized displays. To remedy the problem, an on-board, small-sized inductor in the forms of coils in a printed circuit board (PCB) is proposed for a superior solution. This PCB-type inductor can be incorporated into the same board with other drive chips for the displays, while offering large, adequate current, as an incapable task via an on-chip coil.