Abstract: Aiming at the problems of low input voltage and high demand on driving voltage frequency and

amplitude of the traffic sign power supply using smart electroluminescent（S.E.L）technology，a high rise ratio high

frequency inverter drive circuit based on the cascade connection of the Boost circuit with soft switching and the Eclass circuit was proposed. Utilizing the high impedance characteristics of S.E.L material at the driving frequency，

the E-class converter with current source characteristics was used to achieve the high increase of the voltage across

the load. The proposed converter could realize the zero voltage switching（ZVS）of the two-stage converter at the

same time when the driving frequency and driving voltage required by the load were satisfied. Finally，a prototype

with a boost ratio of 14 was used to verify the correctness of the analysis.

      Key words: smart electroluminescent（S. E. L）components；E-class inverter；Boost converter；zero voltage

switching（ZVS）；high voltage ratio