LED driver de-clutters low power lighting apps

LED driver de-clutters low power lighting apps

Integrating a 100-V rated N-channel MOSFET with a pre-biased NPN transistor, the AL5801 linear LED driver will drive chains of up to 30 low-power, series-connected LEDs with currents from 20 to 350 mA. Its open-drain output operates between 1.1 and 100 V, ensuring common 12, 24, and 48 V power rails are supported, while the LED current is set using an external low value resistor.

By generating a 0.56-V reference voltage across the resistor, the driver’s internal control transistor helps minimize power losses and ensures sufficient supply voltage margin. Due to the reference voltage’s negative temperature coefficient, the output current is automatically reduced at higher temperatures, helping to protect the LED chain from any damage, thus improving overall circuit reliability. Housing is in SOT26 packages and temperature range is from –40° to 150°C. ($0.11 ea/1,000 — available now)

By Christina Nickolas

Diodes , Plano , TX
Sales 972-987-3900

www.diodes.com