A dynamic model and an improved current control technique for a quantum series resonant converter with non-periodic integral cycle mode are proposed to overcome the disadvantages of the integral cycle mode controlled series resonant converter. With the proposed dynamic model, a simple and exact analysis for the internal operational characteristics is newly explored. Based on this analysis, a new improved current control technique is developed and its advantages over other types of current control techniques are discussed. With respect to current ripple and current offset, near optimum operational mode patterns can be obtained using the proposed control technique. Furthermore, fast transient response with negligible overshoot can also be achieved.