According to Cree Inc Pulsed Over-Current Driving of Cree® XLamp® LEDs app note, driving LEDs with high current pulses can be performed as long as the following guidelines are respected:
Based on the 1-KHz pulse testing we have reviewed in this application note, Cree suggests the following guidelines for pulsed current operations:
- For duty cycles between 51-100%, do not exceed 100% of the maximum rated current;
- For duty cycles between 10-50%, do not exceed more than 200% of the maximum rated current;
- For duty cycles less than 10%, do not exceed more than 300% of the maximum rated current.
Although these guidelines may hold true for Cree's XLamp LEDs, are they applicable to smaller signal (5mm) LEDs?