Patent ID: 6853562
Filing Date: 2005-02-08
Classification: H02J,H02M,Y02B

Abstract:
1. A power supply system for providing regulated DC output voltage from an input DC voltage comprising: a plurality of switching power supply units with paralleled outputs, each unit having a power processing circuitry with all output devices being current bi-directional devices providing an output voltage, each unit having a control and drive circuitry, each unit having a simulating circuitry providing a simulated output voltage with said all output current bi-directional devices of respective unit enabled, and each unit having an enabling signal circuitry, wherein each said enabling signal circuitry enables during start-up said all output current bi-directional devices of respective unit at instant when said simulated output voltage rises to said regulated DC output voltage, whereby, said regulated DC output voltage has no overshoot spikes regardless of start-up order of said plurality of switching power supply units, whereby, during a start-up of said power supply system, input switching devices of said plurality of switching power supply units are exposed to respective voltage stresses, which do not exceed voltage stresses on said input switching devices during steady-state operation.