Light-emitting diode (LED) driving circuit and LED driving chip

The utility model provides a light-emitting diode (LED) driving circuit, which comprises a rectifying circuit, an LED power supply circuit and an LED driving chip. The LED driving chip can generate a current reference curve with the frequency at least two times of the frequency of alternating current output by the rectifying circuit and controls the LED power supply circuit to provide current with the same frequency as the current reference curve to an LED lamp. The utility model further provides an LED driving chip, which can generate a current reference curve with the frequency at least two times of the frequency of input alternating current and controls a peripheral circuit to provide current with the same frequency as the current reference curve to an LED lamp. The LED driving circuit and the LED driving chip can restrain ripple wave of low frequency output current, fundamentally resolves the problem of low frequency blink in a process supply power for an LED, and is simple in design, low in production cost and high in work reliability.