The PLED family of protectors is unique in that their primary purpose is not to provide overvoltage or overcurrent protection. If an LED string is subjected to an overvoltage or overcurrent event, the failure mode of the LED is usually a short circuit. A shorted LED will go dark, but the remaining LEDs stay illuminated because the current still passes through it. It is interesting to note that the total string voltage is reduced because the shorted LED will have nearly zero volts across it. While a PLED device will offer some overvoltage protection, it will not be completely effective in preventing shorted LEDs. That requires providing overvoltage and overcurrent protection for the constant current driver circuit. If the driver circuit is adequately protected, the shorted failure mode is largely avoided.