SP4480

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 200VP-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 VDD and VSS. 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 8 CAP COIL SP...