General Description

The Supertex HV859 is a high voltage driver designed for driving Electroluminescent (EL) lamps of up to 5.0 square inches. The input supply voltage range is from 1.8 to 5.0V. The device uses a single inductor and a minimum number of passive components. The nominal regulated output voltage that is applied to the EL lamp is ±105V. The chip can be enabled/disabled by connecting the resistor on RSW-Osc to VDD/ground.

Features

► Patented audible noise reduction

► Patented lamp aging compensation

► 210 VPP output voltage for higher brightness

► Patented output timing for high efficiency

► Single cell lithium ion compatible

► 150nA shutdown current

► Wide input voltage range 1.8 to 5.0V

► Separately adjustable lamp and converter frequencies

► Output voltage regulation

► Split supply capability

Applications

► LCD backlighting

► Mobile Cellular Phone keypads

► PDAs

► Handheld wireless communication products

► Global Positioning Systems (GPS)