US 12,456,879 B2
Bi-directional power flow control using a single battery charger
Yen-Mo Chen, Morrisville, NC (US); Rahul Ramesh, Cary, NC (US); Shahriar Jalal Nibir, Apex, NC (US); and Sungkeun Lim, Apex, NC (US)
Assigned to Renesas Electronics America Inc., Milpitas, CA (US)
Filed by Renesas Electronics America Inc., Milpitas, CA (US)
Filed on Nov. 17, 2022, as Appl. No. 17/989,032.
Prior Publication US 2024/0170995 A1, May 23, 2024
Int. Cl. H02J 7/34 (2006.01); H02J 7/00 (2006.01)
CPC H02J 7/34 (2013.01) [H02J 7/0063 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A semiconductor device, comprising:
a bi-directional buck-boost charger configured to:
supply power from a charging interface of an electronic device to a battery in the electronic device in a forward mode; and
supply power from the battery, via the bi-directional buck-boost charger, to a load in the electronic device in a reverse mode;
a first isolation switch disposed between the charging interface and the bi-directional buck-boost charger;
a second isolation switch disposed between the bi-directional buck-boost charger and the load; and
a controller configured to:
enable the first isolation switch and disable the second isolation switch to operate the bi-directional buck-boost charger in the forward mode, wherein under the forward mode, the load in the electronic device is isolated from the charging interface of the electronic device and the battery in the electronic device; and
enable the second isolation switch and disable the first isolation switch to operate the bi-directional buck-boost charger in the reverse mode.