IMP803
Application Information
Test and Application Circuit, 3.0V
Figure 1
shows the IMP803 configured to drive a 3-square-inch
EL lamp, represented as a 10nF capacitor. With a 3.0V input, the
EL lamp will be driven to moderate brightness.
ON = V
DD
2MΩ
OFF = 0V
R
EL
1
V
DD
560µH
1
750kΩ
L
R
SW
1N4148
R
EL-OSC
V
A
V
B
GND
8
2kΩ
2
R
SW-OSC
3
C
S
7
R
CL
6
5
10nF
Equivalent to
3 in
2
lamp
+
V
IN
= 3.0V
4
L
X
0.1µF
100V
–
0.1µF
2
IMP803
C
S
Note:
1. Murata part # LQH4N561K04 (DC resistance <14.5
Ω
)
2. Larger values may be required depending upon supply impedance.
803_09.eps
Figure 1. 3.0V Application
Test and Application Circuit, 5.0V
Figure 2
shows a 5.0V input application driving a 6-square-inch
EL lamp.
ON = V
DD
2MΩ
OFF = 0V
R
EL
1
V
DD
560µH
1
750kΩ
L
R
SW
1N4148
R
EL-OSC
V
A
V
B
GND
8
2kΩ
2
R
SW-OSC
3
C
S
7
R
CL
6 in
2
lamp
6
5
+
V
IN
= 5.0V
4
L
X
0.1µF
100V
–
0.1µF
2
IMP803
C
S
Note:
1. Murata part # LQH4N561K04 (DC resistance <14.5
Ω
)
2. Larger values may be required depending upon supply impedance.
803_10.eps
Figure 2. 5.0V Application
© 2000 IMP, Inc.
Electroluminescent Lamp Driver
5
IMP [ IMP, INC ]
