LED driver suits non-dimmable MR16 lamp designs

18th December 2014
Posted By : Nat Bowers
LED driver suits non-dimmable MR16 lamp designs

Offering high power factor, low THD and low-output current ripple, Diodes Incorporated has announced a compact, two-stage, boost/buck non-dimmable MR16 lamp design solution. The AL8820 LED driver converter operates in continuous-current mode and employs an innovative control scheme to ensure high compatibility with most commonly used electronic transformers.

Combining two DC/DC regulators, the AL8820 provides an ultra low RDS(ON) internal 40V/2A NDMOS switch to minimise power losses while supporting the delivery of large output powers in 5 to 7W MR16 LED lamps. For example, in a 6W MR16 application, the device operates flicker-free with most common LED lighting transformers at a power factor of 0.9 and THD of 30%.

The device features a 5-36V input voltage range and an output current up to 2A can be achieved. A switching frequency of up to 1MHz means that smaller-sized external inductors and capacitors can also be used with the device for MR16 solutions, helping to further minimise overall circuit footprint and BOM cost.

The AL8820’s comprehensive integrated protection features include under-voltage lock out, output short circuit, output open-circuit, over-current, over-voltage and over-temperature protection.

Supplied in a 5x6mm SO-8EP package, the AL8820 LED driver converters for MR16 lamp design are priced at $0.45 each in 10,000 unit quantities.

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