SP4428

® SP4428 Electroluminescent Lamp Driver High Drive Capability for Low Voltage Applications s Low Power +1.1V to +1.7V Single Cell Operation s Low-Cost EL Driver Ideal for Backlighting s DC-to-AC Inverter Generates High Voltage AC to Drive EL Lamps s Externally Adjustable Oscillator s Low Current Standby Mode APPLICATIONS s Pagers s Watches s Backlit LCD Displays DESCRIPTION The SP4428 is a high voltage output DC-AC converter that can operate from a single 1.5 VDC power supply. The SP4428 is capable of supplying 200 VPP (typical), making it ideal for driving electroluminescent lamps. The device features 1µA (typical) standby current, for use in low power portable products. One external inductor is required to generate the high voltage charge, and one external capacitor is used to produce a clock signal that generates the coil and lamp frequencies. The SP4428 is ideal for PDAs, pagers, and other low power portable applications using LCDs in dim or low light environments. The SP4428 is offered in an 8-pin narrow SOIC. For delivery in die form, please consult the factory. COSC VSS COIL D1 1 2 3 4 SP4428 8 7 6 5 HON VDD EL1 EL2 Block Diagram SP4428DS/16 SP4428 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation 1 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 rat...