General Description
The Supertex HV857 is a high voltage driver designed for driving Electroluminescent (EL) lamps of up to 5 square inches. The input supply voltage range is from 1.8V 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 ±95V. The chip can be enabled/disabled by connecting the resistor on Rsw-osc to VDD/ground.
Features
â Patent pending audible noise reduction
â Patent pending lamp aging compensation
â 190VPP output voltage for higher brightness
â Patented output timing for high efficiency
â Single cell lithium ion compatible
â 150nA shutdown current
â Wide input voltage range 1.8V to 5.0V
â Separately adjustable lamp and converter frequencies
â Output voltage regulation
â Split supply capability
Applications
â LCD backlighting
â Mobile cellular phones
â PDAs
â Handheld wireless communication products
â Global Positioning Systems (GPS)
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