Patent ID: 7498694
Filing Date: 2009-03-03
Classification: H02J,H02M

Abstract:
1. A power management device for enabling multiple power sources to supply power to a load, comprising: a buck converter having an input and an output, the output being connected to the load; a plurality of switches, each switching have a first end and a second end, the first end of each switch being connected to the input of the buck converter, the second end of each switch being coupled to one single power source through a path; a sensing unit for sensing electrical conditions of each switch; a control logic, the control logic receiving the electronic conditions from the sensing unit, the control logic being capable of selecting a subset of switches among the plurality of switches to cooperate in a time-divided fashion to allow the power sources associated with a selected subset of switches to provide power to the load, the subset of switches being selected based on feedback information received from the load and an electrical condition received from the path associated with each power source; and a pulse generator coupled between the load and the control logic, the pulse generator receiving the feedback information from the load and generating a pulse signal to the control logic.