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PDF SP4428 Data sheet ( Hoja de datos )
| Número de pieza | SP4428 | |
| Descripción | Electroluminescent Lamp Driver High Drive Capability for Low Voltage Applications | |
| Fabricantes | Sipex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP4428 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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® SP4428
Electroluminescent Lamp Driver
High Drive Capability for Low Voltage Applications
s Low Power +1.1V to +1.7V Single
Cell Operation
s Low-Cost EL Driver Ideal for Backlighting
s DC-to-AC Inverter Generates High
Voltage AC to Drive EL Lamps
s Externally Adjustable Oscillator
s Low Current Standby Mode
APPLICATIONS
s Pagers
s Watches
s Backlit LCD Displays
DESCRIPTION
The SP4428 is a high voltage output DC-AC converter that can operate from a single 1.5 VDC
power supply. The SP4428 is capable of supplying 200 VPP (typical), making it ideal for driving
electroluminescent lamps. The device features 1µA (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 produce a clock signal that generates the coil
and lamp frequencies. The SP4428 is ideal for PDAs, pagers, and other low power portable
applications using LCDs in dim or low light environments. The SP4428 is offered in an 8-pin
narrow SOIC. For delivery in die form, please consult the factory.
COSC
VSS
COIL
D1
1
2
3
4
SP4428
8 HON
7 VDD
6 EL1
5 EL2
Block Diagram
SP4428DS/16
SP4428 Electroluminescent Lamp Driver
1
© Copyright 2000 Sipex Corporation
1 page  
Electroluminescent backlighting is ideal when used
with LCD displays, keypads, or other backlit
readouts. Its main use is to illuminate displays in
dim to dark conditions for momentary periods of
time. EL lamps typically consume less than LEDs
or bulbs making them ideal for battery powered
products. Also, EL lamps are able to evenly light
an area without creating "hot spots" in the display.
The amount of light emitted is a function of the
voltage applied to the lamp, the frequency at which
it is applied, the lamp material used and its
size. There are many variables which can be
optimized for specific applications. Sipex supplies
characterization charts to aid the designer in
selecting the optimum circuit configuration
(see page 6 and 7).
SP4428DS/16
SP4428 Electroluminescent Lamp Driver
5
© Copyright 2000 Sipex Corporation
5 Page 
ORDERING INFORMATION
Model
Temperature Range
Package Type
SP4428CN . ............................................. 0˚C to +70˚C ........................................... 8-Pin NSOIC
SP4428NEB ............................................................................................ NSOIC Evaluation Board
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: [email protected]
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
SP4428DS/16
SP4428 Electroluminescent Lamp Driver
11
© Copyright 2000 Sipex Corporation
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SP4428.PDF ] | |
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