The method of controlling a bidirectional DC / DC converter

Discloses a method for controlling a bidirectional DC / DC converter according to the invention, the DC / DC converter comprises a low-pressure side and a high pressure side of the low pressure side has a plurality of low-side switch, a clamp capacitor and a clamp switch, the high pressure side and having a plurality of high-side switch; the DC / DC converter is operated in the boost mode, the clamping opening with respect to the low-side switch is turned on all the preamble on a switching duty cycle, and the clamping switching off duty cycle time of the switch is smaller than the low-side switch, the low side switch in order to reduce the conduction loss and the clamping switch; or, the DC / DC converter operates in the buck mode; the operation of the low pressure duty cycle is extended to the side of the switch off time interval of the high side switch, so that the low-side switch thereby reducing conduction loss. With the present invention, can improve the power conversion efficiency and reduce the manufacturing cost.