Power supply method

Abstract

A power supply method includes the following steps: detecting whether a battery is installed in a system; delivering a control signal to a power conversion circuit by a controller when it is determined that the battery is not installed in the system; turning on part of a plurality of transistors and turning off the other part of the plurality of transistors by the power conversion circuit according to the control signal and a reference signal, so that an input voltage is delivered to a receiving terminal of the system from a sending terminal of the system through a current path.

What is claimed is: 
     
         1 . A power supply method, comprising:
 detecting whether a battery is installed in a system;   sending a control signal to a power conversion circuit by a controller when the battery is not installed in the system; and   turning on a part of a plurality of transistors and turning off the other part of the plurality of transistors by the power conversion circuit according to the control signal and a reference signal, so as to deliver an input voltage to a receiving terminal of the system from a sending terminal of the system through a current path.   
     
     
         2 . The power supply method according to  claim 1 , wherein turning on the part of the plurality of transistors and turning off the other part of the plurality of transistors by the power conversion circuit according to the control signal and the reference signal comprises:
 receiving the control signal by a communication bus of the power conversion circuit and sending the control signal to a driver by the communication bus; and   turning on the part of the plurality of transistors and turning off the other part of the plurality of transistors by the driver according to the control signal and the reference signal.   
     
     
         3 . The power supply method according to  claim 1 , wherein delivering the input voltage to the receiving terminal of the system from the sending terminal of the system through the current path comprises:
 delivering the input voltage to the receiving terminal of the system from the sending terminal of the system through the part of the plurality of transistors turned on and an inductor.   
     
     
         4 . The power supply method according to  claim 1 , further comprising:
 generating the reference signal by a comparator of the power conversion circuit according to a system divided voltage and a reference voltage.   
     
     
         5 . A power supply method, comprising:
 detecting whether a battery is installed in a system;   triggering a switch circuit by a set of triggering signals so as to conduct a current path when the battery is not installed in the system;   sending a control signal to a power conversion circuit further by a controller when the battery is not installed in the system;   controlling a plurality of first transistors by the power conversion circuit according to the control signal; and   delivering an input voltage to a receiving terminal of the system from a sending terminal of the system through the current path by the system.   
     
     
         6 . The power supply method according to  claim 5 , wherein controlling the plurality of first transistors by the power conversion circuit according to the control signal comprises turning off the plurality of first transistors by the power conversion circuit according to the control signal. 
     
     
         7 . The power supply method according to  claim 5 , wherein triggering the switch circuit by the set of triggering signals so as to conduct the current path comprises:
 turning on a second transistor on the current path by a first triggering signal included in the set of triggering signals and a reference signal; and   turning on a third transistor on the current path by a second triggering signal included in the set of triggering signals.   
     
     
         8 . The power supply method according to  claim 7 , wherein turning on the second transistor on the current path by the first triggering signal included in the set of triggering signals and the reference signal comprises:
 outputting an electric potential signal by a logic gate according to the first triggering signal and the reference signal so that the second transistor is turned on according to the electric potential signal.