Patent ID: 11955821
Assignee: O2MICRO INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 11:
12. The device of claim 10, further comprising:
a fourth switch, coupled between said positive terminal of said second battery and said second output terminal of said charger circuit, and configured to control a connection between said positive terminal of said second battery and said second output terminal; and
a connection switch coupled between said positive terminal of said first battery and said second output terminal, and configured to control a connection between said positive terminal of said first battery and said second output terminal,
wherein said sub-modes further comprise a second-battery buck charging mode, wherein in said second-battery buck charging mode, said switch control circuitry turns off said connection switch and said first and third switches and turns on said second and fourth switches, and said charger circuit converts said input power to regulated output power to charge said second battery via said second and fourth switches.