ABSTRACT
VF = 3.0 − 3 × (125 – 25) × 10−3 = 3.0 – 0.3 = 2.7 V (14.1) If the LED is run at a constant current, for example, 300 mA, the associ-
ated power at 125°C is
300 × 10−3 × 2.7 V = 0.81 W (14.2) slumping from the 25°C value of
300 ×10−3 × 3 = 0.9 W by 0.09 W (14.3) that is, by 10%. As a consequence, the light output will decrease because the input power has abated.
