Patent ID: 6894466
Filing Date: 2005-05-17
Classification: H02J,H02M

Abstract:
1. In a circuit having a plurality of DC-DC converter modules, wherein each converter module has an input terminal to which an input DC voltage is coupled and an output terminal where the output DC voltage is provided, and wherein said converter modules are connected in parallel through their output terminals to a common bus connected to a load, an active current sharing system for maintaining the output current of each converter module at approximately the average current of the paralleled converter modules, comprising: a current sense circuit, coupled to each said converter module, for detecting the output current of said converter module and for generating a current sense signal that is a function thereof; a reference circuit for generating a current share signal at a common current sharing bus that is a function of each of said current sense signals; and a control circuit coupled to each said converter module for adjusting the output power of that respective converter module as a function of that converter module's current sense signal and said current share signal.