A new type of drivers for high power light emitting diode is introduced based on Boost-Buck converter that operates in Peak Current Mode. In contrast to conventional LED current drivers, the new driver controls the average current, not the forward peak current. The new control method called as Double-Loop Current-Mode control is proposed through adding a current outer loop that is constituted with an error amplifier and an integrator. Its advantages are that it can regulate the average output current accurately and it is of high power-efficiency. Besides, the new control technique could be applied to different input voltage cases and it can protect the Metal Oxide Semiconductor switches availably.