Drive current of LED

Excessive drive current can damage LED . and the constant current source of power supply can avoid the fluctuations of output current due to the fluctuations of input voltage, and maintain the brightness of LED. Make stability the work current was the first requirement for using LED .
Another noteworthy enhancement is startup current, the long-term big startup current above normal limit. must produce a certain damage for LED.
Finally, we need to perfect the current ripple, achieving current sharing. hopefully lasting no more than 30% .