Patent ID: 8593013

Claim:
A switching control method capable of continuously providing power for a power supply system comprising a first power supply unit and a second power supply unit, the switching control method comprising: generating a first input signal for an operation unit and generating a second input signal for the operation unit and a delay unit; utilizing the operation unit to perform an AND logical operation process on the received first input signal and the received second input signal to generate a first control signal; utilizing the delay unit to delay the received second input signal for a delay time to generate a second control signal; during transition from the first power supply unit to the second power supply unit, conducting a coupling between the first power supply unit and a load at first according to the first control signal, and conducting a coupling between the second power supply unit and the load according to the second control signal after the delay time, when the first input signal is at a first level and the second input signal goes from the first level to a second level; and during transition from the second power supply unit to the first power supply unit, conducting the coupling between the first power supply unit and the load according to the first control signal, and conducting the coupling between the second power supply unit and the load for the delay time according to the second control signal, when the first input signal goes from the second level to the first level and the second input signal goes from the second level to the first level.