High step up voltage gain achieved in DC - DC converters using Linear Peak Current Mode control technique

Conventional dc-dc boost converters are unable to provide high step-up voltage gains due to the effect of power switches, rectifier diodes, and the equivalent series resistance of inductors and capacitors. In this paper a Linear Peak Current Mode Controller (LPCM) for a transformerless dc-dc converters is proposed to achieve high step-up voltage gain without an extremely high duty ratio. In the proposed converter, two inductors with same level of inductance are charged in parallel during the switch-on period and are discharged in series during the switch-off period. The structures of the proposed converter and controller are very simple. Only one power stage is used. Moreover, the steadystate analyses of voltage gains and boundary operating conditions are discussed in detail.