Patent ID: 9178385
Filing Date: 2015-11-03
Classification: H02J,Y02B,Y04S

Abstract:
1. A backup power control system, comprising: a main power supply unit, suitable for outputting a main power; a first negative feedback circuit unit, coupled to a negative end of the main power supply unit; a standby power supply unit, suitable for outputting a standby power; a second negative feedback circuit unit, coupled to a negative end of the standby power supply unit; and a control unit, for switching the first negative feedback circuit unit and the second negative feedback circuit unit to be turned on or not to be turned on in response to whether a normal power supply signal of the main power is received, wherein the control unit comprises: wherein the first negative feedback circuit unit comprises a first delay unit, a first switching unit and a first anti-backflow unit connected in series, and the second negative feedback circuit unit comprises a second delay unit, a second switching unit and a second anti-backflow unit connected in series, wherein when the normal power supply signal is received, the control unit enables the first negative feedback circuit unit to be turned on and enables the second negative feedback circuit unit not to be turned on, and when the normal power supply signal is not received, the control unit enables the first negative feedback circuit unit not to be turned on and enables the second negative feedback circuit unit to be turned on, so that the standby power is supplied.