SP4501 Datasheet | Sipex

DESCRIPTION The SP4501 provides designers with both an electroluminescent lamp driver for backlighting and a piezotransducer driver to generate audio alert tones. The integration of an EL lamp driver and a piezotransducer driver in a single cost-effective IC reduces system cost, board space requirements and ponent count. The SP4501 is ideal for portable applications such as pagers, electronic games, PDAs, medical equipment, and designs with liquid crystal displays, keypads, and backlit readouts. The SP4501 will operate from a +2.2V to +6.0V source. The device features a low power standby mode which draws less than 1µA (typical). The frequency of the internal oscillator is set with a single external resistor. The piezotranducer driver can be driven with the internally generated clock signal or an external clock signal provided by the designer. A single inductor is required to generate the high voltage AC used to drive the EL lamp and the piezotransducer. All input pins are ESD protected with diodes to VDD and VSS. ELEN 1 PZEN 2 ROSC 3 SP4501 14 VDD 13 EL2 12 EL1 11 PZ2 10 PZ1 9 8 CAP COIL PZCK 4 PZCK 5 no connect 6 VSS 7 11-14-00 SP4501 EL Plus Piezo Driver © Copyright 2000 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Power Supply, VDD 7.0V Input Voltages, Logic -0.3V to (VDD+0.3V) Lamp Outputs 220VP-P Operating Temperature -40˚C to +85˚C Storage Temperature -65˚C to +150˚C Power Dissipation Per Package 14-pin SOIC (derate 8.33m W/˚C above +70˚C) 700m W 14-pin TSSOP (derate 9.96m W/˚C above...