US 12,237,768 B2
Circuits and systems for generating power from multiple sources
Willy Tjanaka, Santa Clara, CA (US); Mark Isfeld, San Jose, CA (US); Mehran Ataee, Santa Clara, CA (US); Shashi Kumar, Saratoga, CA (US); and Charles Melvin Aden, Berkeley, CA (US)
Assigned to ARISTA NETWORKS, INC., Santa Clara, CA (US)
Filed by Arista Networks, Inc., Santa Clara, CA (US)
Filed on Aug. 30, 2022, as Appl. No. 17/899,397.
Prior Publication US 2024/0072663 A1, Feb. 29, 2024
Int. Cl. H02M 3/158 (2006.01); H02J 1/08 (2006.01); H02J 1/10 (2006.01); H02M 3/157 (2006.01)
CPC H02M 3/158 (2013.01) [H02J 1/082 (2020.01); H02J 1/102 (2013.01); H02M 3/157 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A circuit for generating multiple voltages comprising:
a first DC-DC converter having an input configured to receive power from a first power source, a first output to produce a first voltage, and a second output to produce a second voltage;
at least a second DC-DC converter having an input configured to receive power from a second power source, a first output coupled to the first output of the first DC-DC converter to produce the first voltage, and a second output coupled to the second output of the first DC-DC converter to produce the second voltage, wherein the first DC-DC converter and the second DC-DC converter are configured to produce the first voltage and second voltage when the first power source is active, when the second power source is active, or when both the first and second power sources are active; and
a power adapter selectively coupled to the input of the second DC-DC converter to produce the first voltage and the second voltage when the power adapter is active.