LED lighting driving system

The invention provides an LED lighting driving system, and belongs to the technical field of semiconductors. The LED lighting driving system comprises a transformer and a driving chip. The transformer comprises a first AC input end, a second AC input end, a first AC output end and a second AC output end. The driving chip comprises a first constant current device, a second constant current device, a third constant current device and a fourth constant current device. The anode of the first constant current device is connected with the cathode of the fourth constant current device so as to form a first node. The cathode of the first constant current device is connected with the cathode of the second constant current device so as to form a second node. The anode of the second constant current device is connected with the cathode of the third constant current device so as to form a third constant current device. The anode of the third constant current device is connected with the anode of the fourth constant current device so as to form a fourth node. The first AC output end is connected with the first node. The second AC output end is connected with the third node. The structure of the conventional LED lighting driving system is simplified, power consumption of the driving system is reduced and reliability is system is enhanced.