General Description

The Supertex HV856 is a high voltage, triple EL lamp driver designed for driving combined EL lamps of up to 3.0in2(1.0 in2 each). It is a higher voltage version of the HV858. The input supply voltage range is from 1.8V to 6.5V.

Features

High voltage, Tri-EL lamp driver with common terminal

► Independent brightness control for all three lamps

► 210VPP output voltage for higher brightness

► 1.8V to 6.5V operating supply voltage

► Output voltage regulation

► Two-pin serial data communication for control

► Linear brightness control with seven steps at constant efficiency

► 128kHz fi xed switching frequency

► Split supply capability

► Patented high effi ciency EL lamp driver

► Single miniature inductor drives all three lamps

► Only four external components

► Burst mode power converter for best effi ciency

► CMOS compatible serial interface with noise rejection

► 150nA max. leakage current when disabled

► Power-on reset causes all outputs to be off when fi rst powered up

► Available in 10-Lead DFN package (0.8mm thickness)

Applications

► Multi-segment, variable displays

► Cell phone keypads and displays

► MP3 players