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Energy-efficient LED enables flicker-free brightness

Posted: 06 Jul 2010 ?? ?Print Version ?Bookmark and Share

Keywords:LED driver? lighting solution? converter?

ZLED7000/10 LED driver

ZMD AG is entering the LED market with the release of its first energy-efficient LED driver ICs that can achieve up to 95% efficiency.

"LEDs are very energy-efficient light sources and ZMDI has the mixed-signal expertise to deliver LED driver solutions which maximize the potential of these efficient light sources," noted Carlo Rebughini, VP worldwide sales and marketing at ZMDI. "Our new integrated devices make it possible for companies to build cost-effective LED lighting solutions for home, consumer and industrial lighting applications."

ZMDI's LED driver portfolio is designed for all types of internal and external lighting applications. The ZLED7000 and ZLED7010 drive single or multiple LEDs from a supply voltage range of 6V to 40V, using continuous-mode inductive step-down converters. The ZLED7001 is a peak current mode control LED driver which operates within a wide input range from 8Vdc to 450Vdc or 110Vac/220Vac, making it suitable for direct line-powered applications. All three devices have a very small footprint and are highly integrated thus enabling a very low BOM cost.

The ZLED7000 and the ZLED7010 LED driver both feature an integrated current-switching transistor and require only four external components for a complete driver. Both support wide-range dimming. The ZLED7010 also has integrated LED temperature compensation to ensure that the LED lifetime is maximized. The measured temperature information for the compensation can be cascaded through the ZLED7010 to serve up to 13 LED drivers. Both devices can drive up to 750mA of LED current, and feature regulation better than 2mA. This means the LEDs deliver consistent, flicker-free brightness.

For line-powered applications, the ZLED7001 universal LED driver allows efficient operation of high-brightness LEDs with voltage sources ranging from 8Vdc to 450Vdc, including rectified 110Vac/220Vac. Direct connection to the power line dramatically reduces the cost and size of LED lamps, and makes it possible to create LED lamps which are direct replacements for conventional incandescent and fluorescent lamps. The ZLED7001 delivers excellent dimming response and can be dimmed using either pulse-width modulation techniques or via a linear input control pin. A temperature-compensation input can be used to ensure maximum LED lifetime.

For all three devices, full application kits including application notes and an evaluation board are available now. The ZLED7000 comes in a SOT89-5 package, making it suitable for space-constrained applications such as signage or specialty architectural lighting. The ZLED7001 and ZLED7010 are available in a SOP-8 package. For 1,000 pieces, the ZLED7000 is priced at 0.36 euros ($0.45) ZLED7001 at 0.40 euros ($0.50) and ZLED7010 at 0.63 euros ($0.79). All three devices are available in mass production now.

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