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EL driver reduces circuit complexity

Sunnyvale, Calif. — Supertex Inc. has introduced a high-voltage, low-noise, inductorless electroluminescent (EL) lamp driver IC that requires no external components when the external clock frequency is used for the lamp frequency. The HV853 uses a patented charge pump scheme to eliminate the need for an external inductor, diode, and high-voltage capacitor commonly found in conventional EL lamp driving topologies.

Targeting applications such as cellular phones, MP3 players and luminescent watches with tight space constraints, the IC drives EL lamps of up to 1.5 square inches with capacitive values up to 5.3 nF. The peak-to-peak output voltage is 160 V from an input of 3.2 V to 5.0 V. In addition, the HV853 reduces peak currents via its charge pump circuitry, which minimizes electromagnetic interference (EMI), making it suitable for use in noise sensitive applications such as cellular phones and other wireless devices, said Supertex.

The HV853 is available in MSOP-8 (HV853MG-G) and DFN-8 (HV853K7-G) packages. All parts are Green and RoHS compliant.

Pricing: $1.14 each for the HV853MG-G and $1.16 each for the HV853K7-G, both in quantities of 1,000.
Availability: Samples are available from stock. Lead time for production quantities is four to six weeks ARO.
Datasheet: HV853

Supertex , 1-408-222-8888, www.supertex.com

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