Compact linear LED driver from Diodes suits low-current lighting systems

Delivering a constant current of up to 150mA, the new AL5812 60V linear LED driver from Diodes Incorporated provides designers of low-current illumination and signage applications with a simplified circuit solution for accurately controlling 1/2W LEDs. Housed in small-footprint thermally enhanced SM package options, the driver is able to meet power-handling requirements over a wide supply voltage and ambient temperature range.

The LED current is set using a high value resistor on the driver”s low voltage, 0.5V RSET pin, enabling the specification of a lower cost, smaller footprint resistor to reduce total system BOM cost. A standard low-value decoupling capacitor is the only other external component needed. The driver maintains an LED current accuracy to a tolerance of 3%.

Offered in the exposed pad MSOP-8EP and U-DFN3030-6 packages the AL5812 is able to drive up to 16 low-power LEDs, with its open-drain output handling a swing from 1V to 60V. The driver”s industrial temperature range of -40ºC to +125ºC means it readily accommodates high luminaire operating temperatures.


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