SP4491

 Cellular Phones
 PDA's
 Handheld GPS Units
 Security Systems
 POS Terminals

Power Supply, V_DD.................................................7.0V
Input Voltages, Logic.....................-0.3V to (V_DD+0.3V)
Lamp Outputs...................................................220V_P-P
Operating Temperature.........................-40˚C to +85˚C
Storage Temperature..........................-65˚C to +150˚C
Power Dissipation Per Package
10-pin MSOP
(derate 8.84mW/˚C above +70˚C)....................720mW

The SP4491 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 or concurrently. The S P4491 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 SP4491 can be easily implemented in applications driving multi-color or multi-segment EL lamps. The S P4491 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.