The lifespan of LEDs is a function of the junction temperature, operating voltage and operating current. Failure of a system can occur if any of these factors exceeds the specifications. TE Circuit Protection offers coordinated circuit protection solutions that help provide reliable protection from these events.
LED driver integrated circuits (ICs) used in many designs require a protected DC input to provide stable current to the LED. A PolySwitch device, in series with the LED driver IC, combined with a parallel voltage limiting device such as a Zener or transient suppression diode helps provide effective protection from damage caused by faulty DC input voltages. PolyZen devices provide both protection capabilities in one package.
A PolySwitch device can help provide overcurrent protection for LED ballasts. In addition the device can provide overtemperature protection if it is thermally bonded to the metal core circuit board or heat sink.
PolySwitch Resettable device limit current after the current on the controller exceeds the device specifications. This can help prevent damage to the controller from overheating.
An LVR device can be used to help protect lighting applications and avoid damage to the TRIAC during an overload condition.
PolySwitch devices help protect against overcurrent and overtemperature fault conditions by limiting the flow of current in the DC input power port circuit.
Lighting fixtures powered by AC power can be put at risk from high voltage or power transients on the AC inputs due to lighting strikes, power station load switching transients, or from the resulting surge currents. Overvoltage and overcurrent protection are often viewed as unrelated conditions. TE Connectivity offers designers a complete solution that will help enhance product reliability and safety.