Multiphase Buck Converter Modular Dice Integration
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Solution Overview
Problem
Existing multiphase buck converters are not modular, making it difficult for users to easily integrate them into existing circuits to adapt to dynamic changes in load current.
Innovation Solution
A multiphase buck converter package is designed with at least four MOSFET dice electrically connected through die attach pads, eliminating the need for wirebonding and allowing for modular addition to existing circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If prior art multiphase buck converters are used, then voltage downgrade function is achieved, but modularity is poor making integration difficult
Solution Approach 1:
The buck converter is divided into multiple independent phases, each operating as a separate functional unit. This segmentation allows individual phases to be independently controlled and integrated, enabling modular addition to existing circuits without requiring complete system replacement.
Solution Approach 2:
The converter package integrates multiple functional elements including power switches, control logic, and synchronization mechanisms into a single universal module that can be added to various circuit configurations. This multi-functional design enables the same module to serve different integration scenarios.
2Ease of manufacture
If wirebonding is used to connect dice, then electrical connection is achieved, but manufacturing complexity increases
Solution Approach 1:
The wirebonding process is extracted and eliminated from the manufacturing workflow. Instead of requiring delicate wire bonding operations, the design uses direct die-to-substrate mounting with conductive pathways, removing the complex wirebonding step while maintaining electrical connectivity.
Solution Approach 2:
The mechanical wirebonding process is replaced with a simplified mounting approach where dice are directly attached to the substrate and electrically connected through integrated conductive paths. This substitution eliminates the need for precision wire bonding equipment and processes.
Data Source
AI summary
Disclosed in this specification is a multiphase buck converter package and process for forming such package. The package includes at least four dice and several parallel leads. The dice are electrically connected through a plurality of die attach pads, thus eliminating the need for wirebonding.