US 12,081,128 B2
Method for controlling a single input dual output DC-DC converter, corresponding converter and computer program product
Alessandro Gasparini, Cusano Milanino (IT); Mauro Leoncini, Varese (IT); Claudio Luise, Pescara (IT); Alberto Cattani, Cislago (IT); Massimo Ghioni, Monza (IT); and Salvatore Levantino, Milan (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Aug. 11, 2022, as Appl. No. 17/885,901.
Claims priority of application No. 102021000022130 (IT), filed on Aug. 20, 2021.
Prior Publication US 2023/0055825 A1, Feb. 23, 2023
Int. Cl. H02J 1/10 (2006.01); H02M 3/158 (2006.01); H05B 45/3725 (2020.01)
CPC H02M 3/1582 (2013.01) [H02J 1/102 (2013.01); H05B 45/3725 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A method for controlling a Single Input Dual Output (SIDO) converter, wherein said SIDO converter comprises:
an input node;
a positive output node;
a negative output node;
an inductor; and
a set of switches including a first switch coupling said input node of the converter to a first terminal of the inductor, a second switch coupling a second terminal of the inductor to ground, a third switch coupling the second terminal to said positive output node, and a fourth switch coupling the first terminal to said negative output node;
said method comprising:
controlling said SIDO converter by a time-shared control where charge packets are independently served to each of the negative output node and the positive output node according to conversion cycles wherein each conversion cycle comprises:
a positive phase including a positive inductor charge phase in which only the first and second switches are closed followed by a positive inductor discharge phase in which only the third and fourth switches are closed; and
a negative phase including a negative inductor charge phase in which only the first and second switches are closed followed by a negative inductor discharge phase in which only the second and fourth switches are closed; and
wherein said positive phase further comprises, between said positive inductor charge phase and positive inductor discharge phase, an additional phase in which only the first and third switches are closed for an always fixed time duration set as a function of a worst case of an imbalance between current delivered to the negative output node and current delivered to the positive output node.