A 4.5V supplycan power as many as eight LEDs.Tests show that this circuit works from4.5V to 0.94V, which is lower than thedata-sheet-specified 1V. The LED driveruses a 4.7-μH inductor. Setting the ...

The forward voltage at 20 mA varies from 1.59 to 1.94V, or 1.765 ± 9.9%. By editing the “N=2.3299” statement in the LED model to “N=2.3299 DEV 10%” assigns a 10% device tolerance to the LED model.