| 摘要 |
<p>The present disclosure relates to a lighting device that employs at least one string of LEDs as a lighting source. The string of LEDs is coupled in series with a first switch, wherein the string of LEDs and the first switch are coupled between a power supply node and ground. During a normal operation mode, a system controller is configured to operate the first switch to deliver a drive current to the string of LEDs from the power supply node. The system controller is associated with circuitry that allows the system controller to monitor the drive current and determine when an overcurrent condition occurs. Upon detecting the overcurrent condition, the system controller will open the first switch to stop the drive current from flowing through the string of LEDs.</p> |
