Fast control technique for high frequency DC/DC integrated converter based on non-invasive output capacitance current estimation

摘要

High switching frequency allows the integration of low power DC/DC converters. Although a high switching frequency would make feasible a voltage mode control with 1MHz bandwidth, parasitic effects and robustness don’t allow such a high bandwidth. This paper proposes a fast control to optimize the dynamic response of high frequency DC/DC converters. The proposed control is based on the peak current mode control of the output capacitor current. The output capacitor current loop provides fast dynamic response while the voltage loop provides accurate steady state regulation. Experimental results have validated the fast dynamic response of the proposed control under load steps