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SP4438 Datasheet

Part Number SP4438
Manufacturers Sipex
Logo Sipex
Description Ultra-Quiet Electroluminescent Lamp Driver For Cellular Phone Applications
Datasheet SP4438 DatasheetSP4438 Datasheet (PDF)

® SP4438 Ultra-Quiet Electroluminescent Lamp Driver For Cellular Phone Applications s Patent Pending Output Waveshaping s Waveshaped Output Optimized For Low Acoustic Noise And Maximum Efficiency s Reduced Supply Current And Standby Current s Up to15cd/m2 For Cell Phone Sized EL Lamps (2 to 3 sq. in.) s Waveshaped Output And Low Frequency Operation Minimize Stress On EL Lamp To Extend Its Lifetime s Uses 820µH, Sub-2mm Coils s Gradual Rising And Falling Edges Minimizes EMI s +2.7V To +3.3V Bat.

  SP4438   SP4438






Ultra-Quiet Electroluminescent Lamp Driver For Cellular Phone Applications

® SP4438 Ultra-Quiet Electroluminescent Lamp Driver For Cellular Phone Applications s Patent Pending Output Waveshaping s Waveshaped Output Optimized For Low Acoustic Noise And Maximum Efficiency s Reduced Supply Current And Standby Current s Up to15cd/m2 For Cell Phone Sized EL Lamps (2 to 3 sq. in.) s Waveshaped Output And Low Frequency Operation Minimize Stress On EL Lamp To Extend Its Lifetime s Uses 820µH, Sub-2mm Coils s Gradual Rising And Falling Edges Minimizes EMI s +2.7V To +3.3V Battery Operation s Space-Saving 8-pin MSOP package APPLICATIONS s Cellular Radios s Wireless Communication Products DESCRIPTION The SP4438 device is a low noise, high voltage output DC-AC inverter designed to drive electroluminescent lamps to backlight liquid crystal display and keypads used in cellular phones, cordless phones, 2-way radios, and other wireless communication products. The output waveform of the SP4438 device is ideal for cell phone applications requiring low acoustic noise performance. One external resistor is used to set the internal oscillator frequency and one inductor is required to generate the high voltage AC output to drive an EL lamp up to 3 square inches in size. The SP4438 operates from a +3.0V battery source and has a low power standby mode that draws less than 1µA, making it ideal for low-power cellular applications. All input pins are ESD protected with internal diodes to VDD and VSS. The SP4438 is offered in a space-saving 8-pin MSOP package. VBATT VDD 1 E.


2005-06-07 : DI815C    FT2232L    PCI9052    XL93LC46    F2Dxxx    NE74114    TSC333    CS8954    SSI78A263A    B4207   


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