Patent ID: 7514913

Claim:
A method of controlling output voltage under steady and transient state conditions in an electronic DC-DC power supply converter system based on Buck, Forward, Push-Pull, Half Bridge, Full-Bridge topologies, comprising: (a) determining input voltage (V in (n)) and reference output voltage (V ref ) in said system, (b) determining reference input current (i ref (n+1)), actual inductor current (i L (n)) in said system, and (c) controlling a duty cycle (d(n)) in said system according to the algorithm d ⁡ ( n ) = L T s · i ref ⁡ ( n + 1 ) - i L ⁡ ( n ) K · V i ⁢ ⁢ n ⁡ ( n ) / N + V ref K · V i ⁢ ⁢ n ⁡ ( n ) / N where L is inductor value, T s is switching period, where K=1 for Buck, Forward, Push-Pull and Full-Bridge converters and K=0.5 for Half-Bridge converter, where N is transformer turns ratio for Forward, Half Bridge, Full-Bridge, and Push-Pull converters, N=1 for Buck converter, so as to provide the output voltage approaching the reference output voltage.