SP4403 Datasheet, PDF (1/14 Pages) Sipex Corporation – Low Voltage Electroluminescent Lamp Driver

®
SP4403
Low Voltage Electroluminescent Lamp Driver
s +2.2V to +4.5V Battery Operation
s DC-to-AC Converter Produces Up To
220V_PP for EL Display Panels
s Single Resistor Controlled Internal Oscillator
s Low Current Standby Mode
s 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
100nA (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
SP4403DS/05
SP4403
8 ROSC
7 CINT
6 _VDD
5 EL2
ELEN
1
ROSC
450kΩ
VDD
6
ROSC
8
SP4403
3
COIL
7
CINT
C1
0.1µF
C2
10nF
2
VSS
45
EL1
EL2
L1
470µH
1ND41148*
18C0^I0^NTpF^*
SP4403 Electroluminescent Lamp Driver
1
EL Lamp
*optional device
© Copyright 2000 Sipex Corporation