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LED driver offers high e-transformer compatibility

The AL8820 LED driver converter from Diodes is a two stage, boost/buck, non-dimmable MR16 lamp design solution offering high power factor, low total harmonic distortion and low output current ripple.

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%.

Combining two DC/DC regulators in a 5 x 6mm SO-8EP package, it operates in continuous current mode and employs an innovative control scheme to ensure high compatibility with most commonly used electronic transformers.

An ultra low RDSON internal 40V/2A NDMOS switch helps minimise power losses while supporting the delivery of large output powers in a wide range of 5 to 7W MR16 LED lamps.

The device features a wide 5 to 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.

Laura Hopperton

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