Patent ID: 6329796
Filing Date: 2001-12-11
Classification: H02J

Abstract:
A battery charging/discharging circuit comprising:a first switch for selectively coupling a battery to a load along a charging/discharging path, or coupling said battery to a power source along said charging/discharging path; anda first analog switch controller for selectively controlling the conduction state of said switch comprising a charge enable signal generator circuit for generating a first control signal indicative of the presence of said power source and the charging status of said battery, and a current comparator for comparing a threshold current to a battery discharge current and for generating a second control signal indicative of the battery discharge current; wherein the conduction state of said switch being controlled by said first or second control signal;a second switch coupled between said switch and said battery along said charge/discharge path for selectively coupling said battery to said load or said power source; anda second analog switch controller for selectively controlling the conduction state of said second switch comprising a comparator for comparing a maximum battery discharge current to said battery discharge current and generating a third control signal indicative of said battery discharge current; wherein the conduction state of said second switch being controlled by said third control signal.