HV839
High Voltage Dual EL Lamp Driver
Features
Independent input control for lamp selection Split supply capability P...
HV839
High
Voltage Dual EL Lamp Driver
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 5.8V Output
voltage regulation No SCR output Available in small packages (10-lead MSOP and 10-lead DFN/MLP)
Applications
Mobile cellular phones, dual display Keypad and LCD backlighting Portable instrumentation Dual segment lamps Hand held wireless communication devices
Typical Application Circuit
General Description
The Supertex HV839 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 5.8V. 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 ±90V is applied to the EL lamps. The two EL l...