Abstract: A lamp controller has an LED lamp. The lamp is disposed with a light source and two same drive circuits, one of the drive circuits is work drive circuit, the other one is the backup drive circuit, the two drive circuits output are parallel to each other and connected to the light source; the controller includes an AC/DC conversion circuit, microcontroller, switch circuit and drive state detection circuit, the AC/DC conversion circuit is converted the mains supply to low-voltage direction current and supplying power to the microcontroller and the switch circuit, the drive state detect circuit gets the work state information of the work state drive circuit and submits the information to the microcontroller, the microcontroller controls the switch circuit to alternatively connect the input of the work drive circuit or the backup drive circuit to the mains supply according to the work drive circuit work state information.

Abstract: An intelligent LED drive power has an EMI filter, two AC/DC constant current units, a microcontroller, a switch unit, two state detect circuits and an assistant power. The input and output of the constant current units are alternatively connected to the output of the EMI filter and the LED light source through the switch unit. The inputs of each state detect circuits are separately connected to the output of one of the constant current units. The outputs of each state detect circuit are separately connected to the microcontroller input; the microcontroller output is connected to the switch unit input; the assistant power input is connected to the EMI filter output. The assistant power output is connected to the microcontroller. The switch controls the two AC/DC constant current units by detecting the mains supply input voltage and the AC/DC constant current unit output voltage and current.

Abstract: An intelligent LED drive power has an EMI filter, two AC/DC constant current units, a microcontroller, a switch unit, two state detect circuits and an assistant power. The input and output of the constant current units are alternatively connected to the output of the EMI filter and the LED light source through the switch unit. The inputs of each state detect circuits are separately connected to the output of one of the constant current units. The outputs of each state detect circuit are separately connected to the microcontroller input; the microcontroller output is connected to the switch unit input; the assistant power input is connected to the EMI filter output. The assistant power output is connected to the microcontroller. The switch controls the two AC/DC constant current units by detecting the mains supply input voltage and the AC/DC constant current unit output voltage and current.