Accurately simulate an LED

摘要

Solid-state-lighting applications are quickly moving into the mainstream. Although they are more efficient, the LEDs that produce the low-cost light often require a complicated driver circuit.rnTesting the driver circuit using LEDs, although easy, yields only typical results because the tests don't factor in worst-case LED parameters and often generate undesirable light and heat during driver debugging. Although using a constantrnresistance might seem to be an appropriate approach, a resistor approximates an LED load at only one point on the current/voltage curve. An electronic load may prove to be a more useful approach. The control loops of the driver circuit and the electronic load, however, often result in system instability and oscillations.