The invention relates to an LED driving power supply
control circuit. The LED driving power supply
control circuit comprises an EMI filter and
rectifier module, a DC-DC isolation
constant current driver module, an input under-
voltage lag protection module, and an output current protection module, wherein the EMI filter and
rectifier module is used for performing EMI filter and full-wave rectification on an alternating-
current voltage input by a power supply to generate a direct-
current voltage; the DC-DC isolation
constant current driver module is used for
processing the direct-
current voltage so as to generate a constant output current for the work of the LED power supply; the input under-
voltage lag protection module is used for clamping and splitting the direct-current
voltage so as togenerate an enable
signal and controlling the DC-DC isolation
constant current driver module to start or not to start according to the enable
signal; and the output current protection module is used for detecting the constant output current and controlling the DC-DC isolation constant
current driver module to stop generating the output current while the constant output current exceeds a
current threshold. The invention also relates to an
LED lamp. The LED driving power supply
control circuit and the
LED lamp realize the alternating-current inputting and constant-current outputting in a wide range and have the input clamping
lag protection and the output
overvoltage protection functions.