SP4490 Datasheet, PDF (1/12 Pages) Sipex Corporation – Two Panel Electroluminscent Lamp Driver

®
SP4490
Two Panel Electroluminscent Lamp Driver
s Single IC Drives 2 EL Lamps
Independently For Backlighting:
• Cell Phone Keypad & LCD
• Multi-Color EL Lamps
• Multi-Segment EL Lamps
s Control Over Lamp-A & Lamp-B For
Independent Operation
s +2.2V to +6.0V Battery Operation
s Single Coil Used To Generate High
Voltage AC Outputs
s Low Power Standby Mode Draws 100nA
Typical Current
s A Single Resistor Controls the Internal
Oscillator
s DC-AC Inverter Produces Up To 220V_PP
s Space-Saving 10µSOIC Package
APPLICATIONS
s Cellular Phones
s PDA's
s Handheld GPS Units
s Security Systems
DESCRIPTION
s POS Terminals
The SP4490 electroluminescent lamp driver provides designers of cell phones PDA's and
other handheld, portable electronic devices with an integrated solution for driving two EL
lamps independently. The SP4490 reduces system cost, component count and board space
requirements over a discrete 2-EL driver approach. The EL lamps operate in opposite phase
so the SP4490 can be easily implemented in applications driving multi-color or multi-segment
EL lamps. The SP4490 operates from a +2.2V to +6.0V battery source. The device features
a low power standby mode which draws less than 1µA. The frequency of the internal oscillator
is set using a single external resistor. A single external inductor is required to generate the
high voltage AC outputs to drive the EL lamps. All input pins are ESD protected with internal
diodes to V_DD and V_SS.
Rev. 9/12/00
EL1/EL2 1
VDD 2
ROSC 3
ON/OFF ⁴
VSS 5
SP4490
10 EL1
9 EL2
8 ELcommon
7 CAP
6 COIL
SP4490 Two Panel Electroluminescent Lamp Driver
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© Copyright 2000 Sipex Corporation