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)