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| SP4425Q Datasheet, PDF (1/12 Pages) Sipex Corporation – Electroluminescent Lamp Driver for Low Noise Applications | |||
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SIGNAL PROCESSING EXCELLENCE
SP4425Q
Electroluminescent Lamp Driver for
Low Noise Applications
s Low Noise Waveform
s Tunable Waveshaping
s DC to AC Inverter for EL Backlit
Display Panels
s Externally Adjustable Internal Oscillator
s Low Current Standby Mode
APPLICATIONS
s Cellular Phones
s Cordless Phones
s Handsets
s Backlit LCD Displays
DESCRIPTION
The SP4425Q is a high voltage output DC-AC converter that can operate from a single 3.0
VDC power supply. The SP4425Q is capable of supplying up to 220 VPP signals, making it ideal
for driving electroluminescent lamps. The device features 100 nA (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 select the oscillator and lamp
frequencies. The SP4425Q is offered in an 8-pin µSOIC package. For delivery in die form,
please consult the factory.
COSC 1
8 HON
VSS 2 SP4425Q 7 VDD
COIL 3
6 EL1
D1 4
5 EL2
SP4425Q Block Diagram
SP4425QDS/12
SP4425Q Electroluminescent Lamp Driver
1
© Copyright 1998 Sipex Corporation
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