SP4422

® SP4422A Electroluminescent Lamp Driver s 2.2V-5.0V Battery Operation s 50nA Typical Standby Current s High Voltage Output 160 VPP typical s Internal Oscillator APPLICATIONS s PDAs s Cellular Phones s Remote Controls s Handheld Computers DESCRIPTION The SP4422A is a high voltage output DC-AC converter that can operate from a 2.2V-5.0V power supply. The SP4422A is capable of supplying up to 220 VPP signals, making it ideal for driving electroluminescent lamps. The device features 50 nA (typical) standby current, for use in low power portable products. One external inductor is required to generate the high voltage, and one external capacitor is used to select the oscillator frequency. The SP4422A is offered in an 8-pin narrow and 8-pin micro SOIC packages. For delivery in die form, please consult the factory. HON VSS COIL EL2 1 2 3 4 SP4422 8 7 6 5 CAP 2 CAP 1 VDD EL1 SP4422A Block Diagram SP4422ADS/15 SP4422A 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 rating conditions for extended periods of time may affect reliability. VDD............................................................................................................7.0V Input Voltages/Currents HON (pin1).........................................-0.5V to (VDD+0.5V) COIL (pin3)..............................................................60mA Lamp Outputs.............................................................................230VPP Storage Temperature.................................................-65˚C to +150˚C Power Dissipation Per Package 8-pin NSOIC (derate 6.14mWoC above +70oC)...................500mW 8-pin µSOIC (derate 4.85mWoC above +70oC)....................390mW The information furnished herein by Sipex has been carefully reviewed for accuracy and reliability. Its application or use, however, is solely the responsibility of the user. No responsibility for the use of this information is assumed by Sipex, and this information shall not explicitly or implicitly become part of the terms and conditions of any subsequent sales agreement with Sipex. Specifications are subject to change without prior notice. By the sale or transfer of this information, Sipex assumes no responsibility for any infringement of patents or other rights of third parties which may result from its use. No license or other proprietary rights are granted by implication or otherwise under any patent or patent rights of Sipex Corporation. SPECIFICATIONS (T= 25°C; VDD = 3.0V; Lamp Capacitance = 17nF with 100Ω Series resistor; Coil = 5mH (RS = 18Ω); COSC = 100pF unless otherwise noted) PARAMETER Supply Voltage, VDD Supply Current, ICOIL+IDD Coil Voltage, VCOIL HON Input Voltage, VHON LOW: EL off HIGH: EL on HON Current, EL on Shutdown Current, ISD=ICOIL+IDD INDUCTOR DRIVE Coil Frequency, fCOIL=fLAMPx32 Coil Duty Cycle Peak Coil Current, IPK-COIL EL LAMP OUTPUT EL Lamp Frequency, fLAMP MIN. 2.2 TYP. 3.0 20 40 MAX. 5.0 30 60 5.0 UNITS V mA V CONDITIONS VDD=3.0V, VHON=3.0V VDD=5.0V, VHON=5.0V VDD -0.25 VDD-0.25 0 VDD 25 50 0.3 0.25V VDD+0.25 60 500 V µA nA µA VDD