Double-output Luo converters, an advancedvoltage-lift technique

Mirror-symmetrical double-output voltages are specially required in industrial applications and computer periphery circuits. Double output DC–DC converters can convert the positive input source voltage to positive and negative output voltages by two conversion paths. Because of the effect of parasitic elements, the output voltage and power-transfer efficiency of DC–DC converters are limited. The voltage-lift technique is a popular method that is widely applied in electronic circuit design. This technique gives a good way of improveing circuit characteristics, and has been successfully applied for DC–DC converters. As are single output (positive and negative output) Luo converters, double-output Luo converters are a series of new DC–DC step-up converters using only one switch. They are developed from prototypes using the advanced voltage-lift technique. These converters perform from positive to positive and negative DC–DC voltage-increase conversion with high power density, high efficiency and cheap topology in a simple structure. They are different from any other existing DC–DC step-up converters and possess many advantages including high output voltage with small ripples. Therefore these converters will be widely used in computer peripheral equipment and industrial applications, especially for high double-output voltage projects.