DESCRIPTION

The SP4491 electroluminescent lamp driver provides designers of cell phones PDAs and other handheld, portable electronic devices with an integrated solution for driving two EL lamps independently or concurrently. The SP4491 reduces system cost, component count and board space requirements over a discrete 2-EL driver approach. The EL lamps operate in opposite phase so the SP4491 can be easily implemented in applications driving multi-color or multi-segment EL lamps. The SP4491 operates from a +2.2V to +6.0V battery source.

■ Single IC Drives 2 EL Lamps For Backlighting:

• Cell Phone Keypad & LCD

• Multi-Color EL Lamps

• Multi-Segment EL Lamps

■ Control Over Lamp-A & Lamp-B For Independent Or Concurrent Operation

■ +2.2V to +6.0V Battery Operation

■ Single Coil Used To Generate High Voltage AC Outputs

■ Low Power Standby Mode Draws 100nA Typical Current

■ A Single Resistor Controls the Internal Oscillator

■ DC-AC Inverter Produces Up To 220VPP

■ Space-Saving 10MSOP Package

APPLICATIONS

■ Cellular Phones

■ PDAs

■ Handheld GPS Units

■ Security Systems

■ POS Terminals