초록 ▼

A system and method for maintaining a balanced current level among multiple power supply modules within a parallel power supply. An external voltage is applied to an internal reference translator circuit within each of the parallel power supply modules, such that an internal current-sharing voltage

A system and method for maintaining a balanced current level among multiple power supply modules within a parallel power supply. An external voltage is applied to an internal reference translator circuit within each of the parallel power supply modules, such that an internal current-sharing voltage reference is generated within each power supply module. An external reference translator circuit is biased by an independent voltage level, such that the external reference translator circuit generates an external current-sharing voltage reference that is maintained at a higher voltage level than the internal current-sharing voltage references generated within the parallel power supply modules. The external current-sharing voltage reference acts as a master current share reference with respect to which each of the internal current-sharing voltage references. A current adjustment circuit within each of the power supply modules compares the internal current-sharing voltage reference with the master current share reference and generates a current adjustment signal in response to detecting a voltage differential between the master current share reference and the internal current-sharing voltage reference, such that load-sharing is provided among the parallel power supply modules.

대표청구항 ▼

[ What is claimed is:] [1.]1. A circuit for maintaining a balanced output current level among each of a plurality of power supply modules that are connected in parallel to form a parallel power supply that supplies a single load, said circuit comprising:a master reference voltage circuit that provid

[ What is claimed is:] [1.]1. A circuit for maintaining a balanced output current level among each of a plurality of power supply modules that are connected in parallel to form a parallel power supply that supplies a single load, said circuit comprising:a master reference voltage circuit that provides a master reference voltage level to said plurality of parallel power supply modules at a common load adjustment reference node;a load adjustment amplifier within each of said plurality of parallel power supply modules, wherein each of said load adjustment amplifiers compares an output voltage from its corresponding power supply module with said master reference voltage level and adjusts an output current from its corresponding power supply module in response thereto; andan internal reference circuit within each of said plurality of power supply modules, said internal reference circuit comprising:a first voltage source; andan amplifier that compares said master reference voltage level at said common load adjustment reference node with a voltage level from said first voltage source to generate an internal reference voltage level applicable to said common voltage adjustment node, wherein said internal reference voltage level is maintained lower than said master reference voltage level.