Patent ID: 8604642
Filing Date: 2013-12-10
Classification: H02J

Abstract:
1. A power supply switch system for switching power supply to an electronic device, comprising: an adaptor adapted to output a voltage signal; a charger module adapted to receive the voltage signal and output control signals; a battery electrically connected to the charger module; and a switch module adapted to receive the control signals and switch the adaptor and the battery to provide power supply to the electronic device; wherein when the adaptor is powered on, the charger module is adapted to control the switch module to turn off a first connection between the battery and the electronic device; the charger module is adapted to control the switch module to turn on a second connection between the adaptor and the electronic device; and the adaptor is adapted to provide the power supply to the electronic device; the switch module comprises a first MOSFET, a second MOSFET and a third MOSFET; the first MOSFET comprises a first MOSFET gate, a first MOSFET source and a first MOSFET drain; the second MOSFET comprises a second MOSFET gate, a second MOSFET source and a second MOSFET drain; the third MOSFET comprises a third MOSFET gate, a third MOSFET source and a third MOSFET drain; the first MOSFET gate is electrically connected to the charger module for receiving the control signals; the first MOSFET source is grounded; and the first MOSFET drain is electrically connected to the second MOSFET gate; the second MOSFET source is electrically connected to the electronic device; the second MOSFET drain is electrically connected to the adaptor; the third MOSFET gate is electrically connected to the adaptor; the third MOSFET source is electrically connected to the electronic device; and the third MOSFET drain is electrically connected to the battery.