sp4403 Exar Corporation, sp4403 Datasheet - Page 3

• Manufacturer Part Number: sp4403
• Description: Low Voltage Electroluminescent Lamp Driver
• Manufacturer: Exar Corporation

PINOUT
PIN ASSIGNMENTS
Pin 1 — ELEN — Electroluminescent Lamp
Pin 2 — V
Pin 3 — COIL — Coil. The inductor for the
Pin 4 — EL1 — Electroluminescent Lamp. This
Pin 5 — EL2 — Electroluminescent Lamp. This
SP4403DS/05
Enable. When driven HIGH, this input pin
enables the EL driver output EL1 and EL2
(pins 4 and 5, respectively) to the EL lamp.
Connect to the lowest circuit potential,
typically ground.
EL lamp is connected from V
input pin.
is a lamp driver output pin to connect to the
EL lamp.
is a lamp driver output pin to connect to the
EL lamp.
SS
— Power Supply Common.
ELEN
COIL
EL1
V
SS
BATT
SP4403 Electroluminescent Lamp Driver
1
2
3
4
to this
SP4403
3
Pin 6 — V
Pin 7 — C
Pin 8 — R
Connect such that +2.2V < V
An Integrator Capacitor (470pF typical)
connected from this pin to ground filters out
any coil switching spikes or ripple present
in the outer waveform to the EL lamp.
Connecting a fast recovery diode from
COIL (pin 3) to this input pin increases the
light output of the EL lamp.
a 450k
frequency of the internal clock.
8
7
6
5
OSC
DD
R
C
V
— Positive Battery Power Supply.
EL2
— Oscillator Resistor. Connecting
resistor to this input pin sets the
INT
OSC
INT
DD
— Integrator Capacitor.
© Copyright 2000 Sipex Corporation
DD
< +4.5V.