Citation
Viejo de Frutos, Miriam del and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and García Suárez, Oscar and Cobos Márquez, José Antonio
(2010).
Fast control technique for high frequency (5MHz) DC/DC integrated converter.
In: "6th International Conference on Integrated Power Electronic Systems (CIPS)", 16/03/2010 - 18/03/2010, Nuremberg, Alemania. ISBN 978-1-61284-814-3.
Abstract
A switching frequency of 5 MHz allows the integration in a chip of a low power (10W) DC/DC converter. Although this switching frequency would make feasible a voltage mode control with 1MHz bandwidth, the parasitics and robustness don't allow such a high frequency bandwidth. This paper proposes a fast control technique that helps to optimize the dynamic response of high frequency DC/DC converter. The control proposed and analyzed in this paper is based on the peak current mode control of the output capacitor current of a Buck converter. The output capacitor current loop provides fast dynamic response to the control since it behaves as a feed-forward of the load current while the voltage loop provides accurate steady state regulation. Experimental results have validated the fast dynamic response of the proposed control under load steps.
