Digital State Feedback Current Control using Pole Placement Technique for the 42V/14V Bi-Directional DC-DC Converter Application

A digital state feedback control method for the current mode control is proposed. This approach can precisely achieve the interleaved current sharing among the converter modules. As the controller design and system analysis are performed in the time domain, the proposed method can be easily satisfied to the required converter specification using the pole placement technique. For a design example of the proposed control scheme, a parallel module bi-directional converter in a prototype 42V/14V hybrid automotive power system is implemented using a TMS320F2812 digital signal processor (DSP).