Patent ID: 6982885
Filing Date: 2006-01-03
Classification: G05F

Abstract:
1. A current distribution circuit for parallel power supplies, wherein said power supplies comprises at least a first power supply and a second power supply, said current distribution circuit comprising: a voltage amplifier; a power converting unit having an input electrically connected to an output of said voltage amplifier and having an output electrically connected to a load; a current detecting unit having an input electrically connected to said output of said power converting unit and said load; an equivalent diode having an input electrically connected to an output of said current detecting unit and having an output electrically connected to said parallel power supplies; a regulable amplifier having a reverse input electrically connected to said output of said current detecting unit and said input of said equivalent diode, and having a non-reverse input electrically connected to said output of said equivalent diode and said parallel power supplies; an adding unit electrically connected to a non-reverse input of said voltage amplifier and an output of said regulable amplifier; and a soft-start circuit electrically connected to said voltage amplifier and said regulable amplifier, wherein when said second power supply is operated behind said first power supply, an output voltage output from said current distribution circuit to said load is fedback to said soft-start circuit, so that said soft-start circuit is driven and has a voltage, and when a value of said voltage is equal to a proportional value of said output voltage, a surge voltage of said output voltage is lowered.