Abstract：The operation principles of peak current controlled, V2 controlled, and V2C controlled buck converter operating in continuous conduction mode (CCM) are analyzed and compared respectively. It is pointed out that V2C control is essentially a kind of control technique by utilizing peak capacitor voltage and inductor current, quite similar to peak current control. It is also pointed out that both peak current control and V2 control are special case of V2C control. Stability of V2C controlled Buck converter operating in CCM is analyzed in time-domain and frequency-domain respectively. Sub-harmonic oscillation of V2C controlled Buck converter operating in CCM when duty ratio is higher than 0.5 (D> 0.5) can be eliminated by using slope compensation. Simulation and experiment results are given to verify our theory analysis.
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2011, Vol. 26 
