System performance analysis of the input-parallel and output-series full-bridge converters considering parameter difference

System performance of the IPOS (input parallel and output series) full bridge dc-dc converters with different module parameters is studied in this paper. The sensitivity of the output voltage error to the maximum parameter variance of circuit components is analyzed. The less parameter differences of system components have not a great influence on the output voltage according to the mathematical analysis and experimental results when all the switching devices are driven by signals with equal pulse width. So IPOS full bridge converters with an equal pulse width driving control strategy have good robustness.