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Durel combination drivers power EL, LED sources

Posted: 22 Jul 2003 ?? ?Print Version ?Bookmark and Share

Keywords:durel? el driver? electroluminescent lamp driver? hbled driver? high-brightness light emitting diodes driver?

Durel Corp. has expanded its family of combination EL (electroluminescent lamp) and HBLED (high-brightness light emitting diodes) drivers with the release of the D388 IC that combines the functionality of a high-performance EL driver for backlighting monochrome displays and keypads with an efficient HBLED driver to backlight color displays.

Instead of using separate chips to provide the inductive boost for the white/blue LEDs and the high-voltagecharge pump for powering the EL lamp, a single D388 chip can be used. Measuring 4-by-4mm, the combination system operates at high switching frequencies with one low-profile inductor and a minimum number of additional external components for reduced board space.

The driver operates with an input voltage range of 2.5V to 7V, and incorporates major control functions to assure maximum EL lamp brightness with minimum current draw. Samples of the products in leadless QFN-16 packages are available, and the company also offers D388 Designer's Kits to aid designers in configuring an optimized circuit for their applications. Each kit contains a Durel EL lamp, sample D388 units, pre-soldered evaluation board with white HBLEDs, and several values of surface-mount external components.

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