Patent ID: 8729731

Claim:
An electrical system comprising: a system input configured to receive a first power signal from an external power source, wherein the first power signal comprises a first voltage; a system output electrically coupled to the system input; a charger module electrically coupled to the system input; a resistive component coupled between the system input and the system output; a power storage device electrically coupled to the system output and to the charger module; and a sense circuit electrically coupled across the resistive component and electrically coupled to the charger module; wherein: the charger module comprises: a boost converter configured to transform the first power signal to a second power signal comprising a second voltage; and a regulator configured to regulate a passage of electrical current through the regulator; the power storage device is configured to receive at least a portion of the second power signal from the charger module and to output a third power signal; the system output is configured to receive at least one of: (i) at least a portion of the first power signal or (ii) the third power signal; the portion of the first power signal comprises a resistive component output voltage, and the resistive component output voltage comprises at least a portion of the first voltage; the sense circuit comprises a logic unit, a first comparator, and a second comparator; the first comparator is configured to compare the resistive component output voltage and a first reference voltage and to provide a first comparator signal based on a first voltage relationship of the resistive component output voltage and the first reference voltage; the second comparator is configured to compare the first voltage and a second reference voltage and to provide a second comparator signal based on a second voltage relationship of the first voltage and the second reference voltage; and the logic unit is configured to receive the first comparator signal and the second comparator signal and to provide at least one control signal to the regulator based on at least the first comparator signal and the second comparator signal.