SP4480 Datasheet, PDF (1/13 Pages) Sipex Corporation – Dual Electroluminscent Lamp Driver

SP4480
Dual Electroluminscent Lamp Driver
s Backlights Keypad & LCD With A Single
El Driver
s A Single External IC Drives Dual EL
Lamps Simultaneously Or Independently
s A Single Coil Drives Both EL Lamp
s A Single Resistor Controls the Operating
Frequency
s DC-to-AC Inverter Produces Up To
200V
P-P
s Low Current Standby Mode Draws Less
Than 1µA
s +2.2V to +6.0V Battery Operation
DESCRIPTION
The SP4480 provides a designer with two electroluminescent lamp drivers for backlighting
solutions. The EL lamp outputs operate in opposite phase so he SP4480 device can be easily
implemented into applications driving two EL lamps simultaneously or driving double-sided,
multi-color EL lamps. The integration of a dual EL lamp driver in a cost-effective single IC
reduces component count and board space requirements. The SP4480 is ideal for portable
applications such as cellular phones, pagers, PDAs, medical equipment, and other designs
with liquid crystal displays, keypads, and backlit readouts. The SP4480 operates from a
+2.2V to +6.0V source. The device features a low power standby mode which draws less than
1µA (maximum). The frequency of the internal oscillator is set with a single external resistor.
A single 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.
ELEN1 1
ELEN2 2
ROSC 3
no connect 4
no connect 5
no connect 6
VSS 7
SP4480
14 _VDD
13 EL2
12 EL1
11 EL3
10 EL4
9 CAP
8 COIL
SP4480DS/06
SP4480 Dual Electroluminescent Lamp Driver
1
© Copyright 2000 Sipex Corporation