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