Drive circuit, light-emitting diode and mobile terminal

The invention discloses a drive circuit, a light-emitting diode and a mobile terminal. The drive circuit comprises a reference unit, a booster circuit, an error amplifier, a dimming control unit and a constant-flow control unit, wherein the reference unit is suitable for providing first reference voltage and second reference voltage; the booster circuit is suitable for boosting input voltage according to a feedback signal and then providing the input voltage to an input end of a light-emitting diode group; a negative phase input end of the error amplifier is connected with an output end of the light-emitting diode group; a positive phase input end of the error amplifier is suitable for inputting second reference voltage; the output end of the error amplifier is suitable for outputting the feedback signal; the diming control unit is suitable for converting the first reference voltage into reference dimming current according to a dimming control signal; a first input end of the constant-flow control unit is suitable for receiving reference diming current; a second output end of the constant-flow control unit is connected to the output end of the light-emitting diode group and is suitable for providing drive current; both the first output end and the second output end of the constant-flow control unit are grounded; and a current value of the drive current is proportional to that of the reference dimming current.