BATTERY PROTECTION CIRCUIT AND METHOD FOR ENERGY HARVESTER CIRCUIT

摘要

Power management circuitry (7-2,3,4) for converting a harvested voltage (Vhrv) to an output voltage (VBAT) applied to a battery (6) includes an inductor (LO) having a first terminal (3) coupled to receive the harvested voltage (Vhrv) and a second terminal coupled to a first terminal of a first switch (SO). The power management circuitry transfers the current generated by an energy harvester (2) to the battery if it (6) is not fully charged, and shunts the current away from the battery (6) to avoid overcharging if it is fully charged.