A VOLTAGE/CURRENT REGULATOR AND METHOD FOR BATTERY CHARGING

摘要

A voltage/current regulator (1) for regulating charging of a rechargeable battery (2) in a portable apparatus (23), comprising a transistor (6), and controller means (9) coupled to said transistor (6) for controlling the charging current to the battery (2). Further the controller means (9) is capable of: determining the power dissipation in the transistor (6) of the regulator (1); determining if the power dissipation is above a maximum allowed power dissipation, if so, decreasing the charging current by a particular current step, if not, determining if the power dissipation will exceed the maximum allowed power dissipation if the charging current is increased by the current step, and if so, increasing the charging current by the current step.