Integrated low power low voltage isolated switch mode power supply

Dual Active Bridge converter is selected for the implementation of hybrid integration of isolated low power low voltage SMPS. Its architecture, as well as natural ZVS operation and limited amount of passive devices are convincing criteria for this type of application. Its design analysis shows outstanding ability to minimize passive elements while offering high efficiency levels, in the range of 90%. Details of active and passive device designs are given. The experimental results carried out upon the realization of specific CMOS chips and passive devices demonstrate the interest of such conversion structure for SMPS low power low voltage applications.