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Lamp Driver

Mon, 02/25/2002 - 4:20am
Durel Corporation announces the immediate availability of its new high performance D381A electroluminescent (EL) lamp driver for PDAs and other wireless electronic devices. This new IC inverter offers designers the ultimate design flexibility with the lowest audible noise. With the D381A EL driver, designers can achieve longer EL lamp and battery life while delivering much higher EL lamp brightness for large area liquid crystal displays (LCDs) in the most demanding applications.

Based on Durel Corporation's patented 3-Port (3P) topology, the D381A EL driver provides an efficient, low-noise, high voltage AC output from a 2.0 to 7.0 Vdc supply voltage. Unique to the 3P topology, designers can ground one of the two lamp electrodes, thereby enabling improved management of electromagnetic interference (EMI) and reduced system costs. Rich with flexible design features, the D381A is equipped with proprietary "wave-shaping"™ programmability for reducing audible noise. It also has dual on-chip oscillators for independent selection of inductor switching and lamp output through the choice of external capacitor values or with separate external clock signals. This option allows for component cost savings, precision control of frequencies, and stability of lamp color over wide temperature extremes. The D381A EL driver draws very low current in the standby mode, which makes it ideal for low-power portable products. It also can use ultra-low-profile inductors without fear of saturation for applications requiring thin form factors.

With the D381A EL driver, designers can shift more readily away from discrete light emitting diodes (LEDs) to the most efficient and cost-effective EL lamp systems. EL is the system of choice for backlighting the keypads and displays of handheld communications and computer equipment, satisfying consumer demand for well-illuminated displays. As part of its systems-solution approach, Durel provides comprehensive design and development support for all its customers requiring assistance in EL backlighting systems for their applications.

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