LED Driver From Diodes Delivers Higher Current For Low Voltage LED Lamps

May 4, 2011 5:24 PM

The AL8806 buck LED driver from Diodes Incorporated is capable of producing a constant current of up to 1.5A from voltage sources of between 6V and 30V. Suiting MR16, 12V and 24V LED lamp design, the driver ensures a 5% average LED current accuracy for up to 9 high power LEDs over the wide operating voltage range, helping to significantly improve inter-lamp luminance matching.

The high current handling of the AL8806 means it will also meet the needs of the latest multi die package LEDs, where current levels above 1A are required. This simple, cost-effective driver is packaged in the small footprint low thermal impedance MSOP-8EP, supporting higher LED current drive at higher ambient operating temperatures. Device efficiency is high at up to 98%.

Maximum output current is simply set via a resistor and switching at a frequency of up to 1MHz, the driver helps reduce the size of supporting external components, enabling PCB size to be minimized. Lamp dimming is achieved by applying either a DC voltage or PWM signal that provides a wide range of brightness control that doesn't over drive the LED current.

The AL8806 30V, 1.5A buck LED driver is priced at $0.55 each in 1k quantities.

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