When Designing with Power LEDs, Consider Their Real Thermal Resistance

András, Poppe ✉ [Poppe, András (Mikroelektronika), szerző] Elektronikus Eszközök Tanszéke (BME / VIK)

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: LED PROFESSIONAL REVIEW 1993-890X 2009 (16) pp. 40-43 2009
    It is a well-known fact that the light output characteristics of light emitting diodes (LEDs) depend heavily on the operating conditions. The forward current applied to the LED is the primary variable – the higher the supplied current, the more light that is generated by the device. Unfortunately, when an LED is driven by a constant current source, the light output drops when the LED’s temperature increases. This common feature of all LEDs is best illustrated by the dependence of their light output spectra as shown in Figure 1. In addition to the efficiency loss, the color of the LEDs’ light also changes as proven here by the shift in the peak wavelength.qq
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2021-05-06 21:51