Input power sharing

Abstract

An input power sharing control circuit is provided. The control circuit includes a plurality of current limiting circuits each circuit adapted to receive power from one of a plurality of independent power sources, a power switching control circuit adapted to receive power from the plurality of independent power sources and provide a variable power output and a load coupled to the output of the power switching control circuit, wherein the value of the load impedance and the value of the voltage of the output power controls the variable power output.

1 . An input power sharing control circuit, the circuit comprising: 
 a power switching control circuit adapted to receive power from a plurality of input power sources and provide a variable output power;    the power switching control circuit including:    a plurality of switching transistors each adapted to couple to one of the plurality of input power sources;    a plurality of substantially equal inductors each adapted to coupled to one of the plurality of switching transistors and to control the current for each of the plurality of input power sources; and    a pulse width modulator coupled to the switching transistor and adapted to regulate the variable output power by controlling the on time of the switching transistor;    
   
   
       2 . The control circuit of  claim 1 , wherein the variable output power is greater than the power from each of the plurality of power input sources.  
   
   
       3 . The control circuit of  claim 1 , wherein the power switching control circuit is a discontinuous fly back converter.  
   
   
       4 . The control circuit of  claim 1 , wherein a plurality of substantially equal inductors adapted to control the current for each of the plurality of input power sources comprises a plurality of substantially equal inductors adapted to boost the current for each of the plurality of input power sources.  
   
   
       5 . An input power sharing control circuit, the circuit comprising: 
 a power switching control circuit adapted to receive power from a plurality of substantially equal input power sources and provide a variable output power;    the power switching control circuit including:    a plurality of substantially equal transformers adapted to receive power from the plurality of input power sources and control the current for each of the input power sources;    a plurality of switching transistors each adapted to couple to one of the plurality of transformers;    a pulse width modulator adapted to couple to each of the plurality of switching transistors and regulate the output power by controlling the on time of the plurality of switching transistors.    
   
   
       6 . The control circuit of  claim 5 , wherein the variable output power is greater than power of each of the plurality of input power sources.  
   
   
       7 . The control circuit of  claim 5 , wherein the power switching control circuit is a discontinuous fly back converter.  
   
   
       8 . The control circuit of  claim 5 , wherein a plurality of substantially equal inductors adapted to control the current for each of the plurality of input power sources comprises a plurality of substantially equal inductors adapted to boost the current for each of the plurality of input power sources.  
   
   
       9 . An input power sharing control circuit, the circuit comprising: 
 a power switching control circuit adapted to receive power from a plurality of substantially equal input power sources and provide an output power that is greater than each of the plurality of power inputs;    the power switching control circuit including:    a plurality of substantially equal transformers adapted to receive the power inputs and boost the current for each power input; 
 a switching transistor coupled to each of the plurality of transformers; and  
   a pulse width modulator adapted to couple to the switching transistor and regulate the output power by controlling the on time of the switching transistor.    
   
   
       10 . The control circuit of  claim 9 , wherein the power switching control circuit is a discontinuous fly back converter.