Patent ID: 8405358
Filing Date: 2013-03-26
Classification: H02J

Abstract:
1. A charging path comprising: a charging switch for transferring a charging current from an input terminal to an output terminal; and a first enable terminal coupled to said charging switch and for receiving a first enable signal to control said charging switch to operate in a mode of a plurality of modes comprising a first mode, a second mode, and a third mode, based on a status of said output terminal, wherein said status of said output terminal comprises a first voltage at said output terminal when said charging switch is turned on and a second voltage at said output terminal when said charging switch is turned off, wherein said first enable terminal controls said charging switch to operate in said first mode when said second voltage is greater than a first predetermined threshold and less than a second predetermined threshold, wherein said charging switch is fully turned on in said first mode, wherein said first enable terminal controls said charging switch to operate in said second mode when said first and second voltages are less than said first predetermined threshold, wherein an equivalent resistance of said charging switch is determined by a control terminal of said charging switch in said second mode, and wherein said first enable terminal controls said charging switch to operate in said third mode when said second voltage is equal to or greater than said second predetermined threshold, wherein said charging switch is turned off in said third mode.