SP4403

® SP4403 Low Voltage Electroluminescent Lamp Driver s +2.2V to +4.5V Battery Operation s DC-to-AC Converter Produces Up To 220VPP for EL Display Panels s Single Resistor Controlled Internal Oscillator s Low Current Standby Mode s Features High Efficiency Super Driver Architecture Uses Small 470µH Coil APPLICATIONS s Pagers s Cellular Phones s PDAs DESCRIPTION The SP4403 is a high voltage output DC-AC inverter specifically designed to drive electroluminescent lamps to backlight liquid crystal displays, keypads, and backlit readouts used in battery operated portable equipment. The SP4403 will operate from a +2.2V to +4.5V battery source. The device features a low power shutdown mode which draws less than 100nA (typical), ideal for low power portable products. One external inductor is required to generate the high voltage AC output. One external resistor is used to select the internal oscillator frequency. The SP4403 is ideal for portable applications such as cellular phones, PDAs, and other portable applications using LCDs in dim or low light environments. The SP4403 is offered in 8 pin µSOIC packages. VBATT ELEN 1 VSS 2 COIL 3 EL1 4 SP4403 8 ROSC 7 CINT 6 5 VDD EL2 C1 0.1µF ELEN 1 L1 470µH SP4403 VDD ROSC 450kΩ 6 3 COIL D1 1N4148* ROSC 8 7 CINT C2 10nF 2 VSS 4 EL1 5 EL2 CINT 1800pF * EL Lamp *optional device SP4403DS/05 SP4403 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only ...