公开(公告)号：US20070035899A1

公开(公告)日：2007-02-15

申请号：US11199644

申请日：2005-08-09

申请人： Kevin Covi ,  Raymond Harrington ,  Robert Makowicki ,  Steven Shevach ,  Dale Sorenson ,  Brian Tucker

发明人： Kevin Covi ,  Raymond Harrington ,  Robert Makowicki ,  Steven Shevach ,  Dale Sorenson ,  Brian Tucker

IPC分类号： H02H9/00

CPC分类号： H02M3/1584 ,  H02M1/32

摘要： A protection circuit for a parallel power system having at least two parallel coupled voltage regulators is disclosed. The protection circuit includes at least two isolation control circuits, each control circuit being coupled to a respective voltage regulator. Each isolation control circuit includes a current sense circuit for sensing current polarity at an output of the respective voltage regulator, and a controller for automatically isolating the respective voltage regulator when an over-voltage condition exists at an output of the parallel power system and a positive current polarity is sensed at the output of the respective voltage regulator. The at least two isolation control circuits isolate only a voltage regulator having positive current outflow during the over-voltage condition. In one embodiment, each isolation control circuit further includes an over-voltage detection circuit for detecting when the over-voltage condition exists at the output of the parallel power system.