SP4403 Datasheet | Sipex

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 100n A (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 L1 470µH VDD ROSC 450kΩ 6 3 COIL D1 1N4148- ROSC CINT C2 10n F 2 VSS 4 EL1 5 EL2 CINT 1800p F - EL Lamp - optional device SP4403DS/05 SP4403 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, VBATT 7.0V Input Voltages, ELEN (pin 1) -0.5V to (VDD+0.5V) Lamp Outputs 250VPP Operating Temperature -40˚C to +85˚C Storage Temperature -65˚C to +150˚C Power Dissipation Per Package 8-pin NSOIC (derate 6.51m W/OC above +70OC) 550m W 8-pin µSOIC (derate 4.85m W/OC above +70OC) 400m W The...