The AL9910 is Diodes Incorporated's first offline LED driver-controller and operates directly off the rectified mains voltage. The AL9910 includes an internal voltage regulator that powers the internal circuitry and gate driver for the external high voltage MOSFET power switch. Two variants are available that match the voltage regulator’s output to the gate drive voltage of the external MOSFET.
The AL9910’s maximum input voltage is 500 V, which improves its ability to withstand higher voltage transients in lamps powered from 230 VAC mains voltages and other high voltage rails. The number of LEDs is determined by the input voltage while the LED current that can be driven is determined by the external MOSFET’s current rating.
The AL9910 is available in a standard SO-8 package as well as the thermally enhanced SO-8EP package. The SO-8EP enables it to operate at higher temperatures and input voltages than competing devices. The AL9910 also incorporates overtemperature protection (OTP) further increasing system reliability.
