Analysis and design of multiple-output converters with stacked secondaries

Stacking secondaries or outputs is an effective way to improve DC cross-regulation for multiple-output power converters. In this paper, various stacking schemes are presented, and DC analysis is performed for each particular scheme. The analysis reveals that stacking introduces an internal voltage compensation mechanism which provides output voltage tracking as any load current changes. The effects of stacking on power loss and current stress of the rectifiers are also analyzed. The analyses are verified on an experimental two-output forward power converter.