SP4491 Datasheet | Sipex

DESCRIPTION The SP4491 electroluminescent lamp driver provides designers of cell phones PDA's and other handheld, portable electronic devices with an integrated solution for driving two EL lamps independently or concurrently. The SP4491 reduces system cost, ponent 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. The device features a low power standby mode which draws less than 1µA. The frequency of the internal oscillator is set using a single external resistor. A single external inductor is required to generate the high voltage AC outputs to drive the EL lamps. All input pins are ESD protected with internal diodes to VDD and VSS. APPLICATIONS s Cellular Phones s PDA's s Handheld GPS Units s Security Systems s POS Terminals ELEN1 VDD ROSC ELEN2 VSS 1 2 3 4 5 SP4491 10 9 8 7 6 EL1 EL2 ELmon CAP COIL Rev. 12/19/00 SP4491 Two Panel Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Power Supply, VDD 7.0V Input Voltages, Logic -0.3V to (VDD+0.3V) Lamp Outputs 220VP-P Operating Temperature -40˚C to +85˚C Storage Temperature -65˚C to +150˚C Power Dissipation Per Package 10-pin MSOP (derate 8.84m W/˚C above +70˚C) 720m W STORAGE CONSIDERATIONS Storage in a low humidity environment is preferred. Large high density plastic packages are...