| Summary: | This paper proposes a miniature DC-DC boost converter to drive the display panel of a notebook computer. To reduce the size of the circuit, the converter was designed to operate at a switching frequency of 1 MHz. The power conversion efficiency improved using a passive snubber circuit that consisted of one inductor, two capacitors, and two diodes; it reduced the switching losses by lowering the voltage stress of the switch and increased the voltage gain using charge pumping operations. An experimental converter was fabricated at 2.5 cm × 1 cm size using small components, and tested at input voltage 5 V ≤ <i>V<sub>IN</sub></i> ≤ 17.5 V and output current 30 mA ≤ <i>I<sub>O</sub></i> ≤ 150 mA. Compared to existing boost converters, the proposed converter had ~7.8% higher power conversion efficiency over the entire range of <i>V<sub>IN</sub></i> and <i>I<sub>O</sub></i>, only ~50% as much voltage stress of the switch and diodes, and a much lower switch temperature <i>T<sub>SW</sub></i> = 49.5 °C. These results indicate that the proposed converter is a strong candidate for driving the display panel of a notebook computer.
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