LED driving controller, lighting device and lighting system

The utility model relates to an LED driving controller, a lighting device and a lighting system. The LED driving controller comprises a rectifier, a buffer and a driving module, wherein the rectifier is used for converting input alternating voltage into direct voltage, the buffer is connected with the rectifier, is used for storing and releasing electric energy and includes an energy storage circuit and an energy storage control circuit which is used for controlling the energy storage circuit to store and release energy, and the driving module is used for driving one or a plurality of light emitting diodes by using the output of the rectifier and the electric energy of the buffer. The energy storage control circuit can prevent an electronic transformer from entering a protection state due to overpower to cause a light source or a lamp to flash continuously or from being turned off due to overpower to cause the lamp or the light source to stop working. The electronic compatibility of the lamp adopting an LED light source or an LED light source module and that of the electronic transformer are improved.