Device for supplying electric power to a mobile telecommunication equipment, and portable equipment using the same

An electric power supplying device for a mobile telecommunication equipment comprising:

• an electronic supply circuit comprising:
• an input terminal adapted to be connected to a power grid;
• an output terminal adapted to be connected to the mobile telecommunication equipment;
• a ground terminal electrically isolated from the input terminal;
• an electric power source, arranged between the input terminal and the output terminal, adapted to supply the mobile telecommunication equipment with electric power via the output terminal, the electric power source being further connected to the ground terminal and comprising a rechargeable battery adapted to store electrical power;
• a switching regulator comprising:
• a servo switch comprising:
• a first commutator arranged between the input terminal and the electric power source;
• and
• a second commutator arranged between the electric power source and the output terminal;
• and
• a management module comprising a first terminal connected to the first commutator and a second terminal connect to the second commutator, the management module being adapted to assess a charge state of the rechargeable battery and to drive the servo switch according to the charge state;
• wherein the first commutator is adapted to direct the electric power coming from the input terminal among the electric power source and the first terminal and the second commutator is adapted to direct the electric power coming from the second terminal among the electric power source and the output terminal.