Constant current control circuit and LED circuit

The utility model relates to a constant current control circuit and an LED circuit. The constant-current control circuit comprises a constant-current unit which is used for connecting a power supply and converting a power supply signal into a constant-current power supply signal for outputting; and the protection unit is respectively connected with the positive output end of the constant current unit and the negative output end of the constant current unit, and is used for conducting the positive output end of the constant current unit and the negative output end of the constant current unit when the output current of the constant current unit is detected to reach a preset threshold value, so that a load receiving the constant current power supply signal is bypassed. According to the constant-current control circuit, the protection unit is arranged on the output side of the constant-current unit of the constant-current control circuit, the output current of the constant-current unit is detected by the protect