SP4428

 Pagers
 Watches
 Backlit LCD Displays

TA= +25°C unless otherwise noted
V_DD..............................................................................................................5V
Input Voltages/Currents
HON (pin1).......................................................................-0.5V to (V_DD+0.5V)
COIL (pin3)..........................................................................................100mA
Lamp Outputs......................................................................................230V_PP
Storage Temperature...........................................................-65°C to +150°C
Power Dissipation Per Package
8-pin NSOIC (derate 6.14mW/ above +70)...................................500mW

The SP4428 is a high voltage output DC-AC converter that can operate from a single 1.5 VDC power supply. It is capable of supplying 200 V_PP (typical), making it ideal for driving electroluminescent lamps. The device features 1mA (typical) standby current, for use in low power portable products. One external inductor is required to generate the high voltage charge, and one external capacitor is used to produce a clock signal that generates the coil and lamp frequencies. The device is ideal for PDAs, pagers, and other low power portable applications using LCDs in dim or low light environments. The SP4428 is offered in an 8-pin narrow SOIC. For delivery in die form, please consult the factory.