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| SP4427 Datasheet, PDF (1/9 Pages) Sipex Corporation – Electroluminescent Lamp Driver Dual Oscillators with High Drive Capability | |||
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SP4427
Electroluminescent Lamp Driver
Dual Oscillators with High Drive Capability
s DC to AC Inverter for EL Backlit
Display Panels
s Low Voltage, Single Battery Operation
(vbat > 1.1 Vdc)
s Dual Oscillator Operation for
Application Flexibility
s Low Current Standby Mode
APPLICATIONS
s Pagers s PDA's s Backlit
LCD Displays
DESCRIPTIONâ¦
The SP4427 is a high voltage output DC-AC converter that can operate from a single 1.5 Vdc
battery supply. The SP4427 is capable of supplying up to 250 Vpp signals, making it ideal for
driving electroluminescent lamps. The device features 100nA (typ) standby current, for use
in low power portable products. One external inductor is required to generate the high voltage
charge, and two external capacitors are used to select the oscillator and lamp frequencies.
The SP4427 is offered in both an 8 pin narrow SOIC or micro SOIC package. For delivery
in die form, please consult the factory.
HON
7
Cosc
1
6
VDD
EN
8 Bit Counter
Coil OSC
COIL
3
H
Bridge
EL1
5
Losc
8
Lamp OSC
VSS
2
EL2
4
Block Diagram
SP4427DS/01
SP4427 Electroluminescent Lamp Driver
1
© Copyright 1997 Sipex Corporation
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