| 摘要 |
The present invention relates to an LED driving device which stably operates an LED when an input voltage changes in a boundary band of a minimum voltage required for the operation of the LED. The LED driving device according to one embodiment of the present invention comprises: a driving circuit which outputs a driving current for operating multiple LEDs using an input voltage; a protection circuit which outputs a sensing voltage by detecting the input voltage, and comprises a circuit element operating with a hysteresis characteristic when the input voltage becomes greater than a certain reference voltage as the input voltage increases, or the input voltage becomes less than the reference voltage as the input voltage decreases; and a control circuit which controls the operation of the driving circuit by detecting the sensing voltage and driving voltage. |
