Embedded magnetics for power system on chip PSoC-thesis
A novel concept of on-chip bondwire inductors and transformers with ferrite epoxy glob coating is proposed, offering a cost effective approach to realize power systems on chip (PSoC) or System-in-Package (PSiP). The concept has b een investigated both experimentally and with finite element modeling. Improvement in total inductance is demonstrated for multi-turn bondwire inductors over single bond wire inductors. The inductance and Q factor can be further boosted with coupled multi-turn inductor concept. Transformer parameters including self- and mutual inductance, and coupling factors are extracted from both modeled and measured S- parameters.
More importantly, the bondwire magnetic components can be easily integrated into SoC manufacturing processes with mi nimal changes to the layout, and open enormous possibilities for realizing cost-effective, high curre nt, high efficiency PSoC’s or PSiP’s. The design guidelines for single bondwire induct ors as well as multi-turn inductors are discussed step by step in several chapters
. Not only is the innovated concept for bondwire inductor with ferrite ink presented, but also th e practical implementation and design rules are given. With all the well defined steps, people who want to use these bondwire inductors with ferrite ink in their PSoC research or products will find it as simple as using commercial inductors. Last but not least, the PSoC concept using a bondwire inductor is demonstrated by building the prototype of dc-dc buck converter IC as well as the whol e package. IC and the whole function block are tested and presented in this work.
A system on chip is an integrated circuit that integrates all components of a computer or other electronic system. These components typically include a central processing unit, memory, input/output ports and secondary storage – all on a single substrate or microchip, the size of a coin
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