General Description
The Supertex HV831 is a high voltage driver designed for driving two EL lamps with a combined area of 3.5 square inches. The input supply voltage range is from 2.0V to 5.0V. The device is designed to reduce the amount of audible noise emitted by the lamp. This device uses a single inductor and minimum number of passive components to drive two EL lamps. The nominal regulated output voltage of ±80V is applied to the EL lamps.

Features
❐ Independent input control for lamp selection
❐ Split supply capability
❐ Patented output timing
❐ One miniature inductor to power both lamps
❐ Low shutdown current
❐ Wide input voltage range 2.0V to 5.0V
❐ Output voltage regulation
❐ No SCR output
❐ Available in 10 - pin MSOP package

Applications
❐ Mobile cellular phones, dual display
❐ Keypad and LCD backlighting
❐ Portable instrumentation
❐ Dual segment lamps
❐ Hand held wireless communication devices