Patent ID: 9654005
Date: 2017-05-16
CPC Classifications: H02J,H02M

Claim:
1. An apparatus, comprising: a) a first switch coupled to an external interface and an inductor; b) a second switch coupled to ground and a common node between said first switch and said inductor; c) a third switch coupled to ground and a common node between said inductor and a fourth switch, wherein said inductor and first, second, third, and fourth switches form a power converter; d) a charge and discharge control circuit coupled to said power converter, and being configured to control said first, second, third, and fourth switches; e) an internal load coupled to said fourth switch; and f) a chargeable battery coupled to said fourth switch, wherein said power converter is configured to provide power from an external power supply to said battery and said internal load when said external interface is coupled to said external power supply, wherein said battery is configured to provide power to said internal load and via said power converter to an external load when said external interface is coupled to said external load, and wherein said battery is configured to provide power to said internal load when said external interface is disconnected from said external power supply and said external load.