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Lamp drivers 'significantly' extends EL lamp life

Posted: 30 Jun 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Supertex? electroluminescent lamp driver? EL lamp driver? HV843? HV845?

Supertex Inc. rolled out two new high brightness, low noise, electroluminescent (EL) lamp drivers, designed to light up dual display cellular phones, portable instrumentation and other handheld devices.

The HV843 and HV845 ICs feature independent input control for lamp selection and 180V peak-to-peak output voltage for high brightness. They are designed to drive two EL lamps with a combined area of 3.5-inches2 from input supply voltages ranging from 2V to 5.8V. Both devices use a single inductor and a minimal number of passive components and each can drive two lamps independently of each other. The HV845 also has two independent common output pins that further help minimize the DC offset in a two segment EL lamp.

According to Ahmed Masood, vice president of marketing for Supertex, the two new products dramatically reduce audible noise, and the two independent common outputs in the HV845 reduce DC offset, which "significantly extends EL lamp life."

The HV843 is available in a MLP/DFN-10 package (HV835K7-G), while the HV845 is housed in a MLP/QFN-12 package (HV845K7-G). These devices are RoHS compliant. Samples are available from stock. Lead-time for production quantities is 4-6 weeks ARO. Pricing is $1.08 each for the HV843K7-G and $1.12 each for the HV845K7-G, both in 1,000-unit quantities.




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