IMP528 IMP Inc, IMP528 Datasheet - Page 4

• Manufacturer Part Number: IMP528
• Description: HIGH-VOLTAGE EL LAMP DRIVER
• Manufacturer: IMP Inc

Test and Application Circuit, 3.0V
Figure 1 shows the IMP528 configured to drive an EL lamp with a
3.0V input.
Dual Supply Operation with 1.5V Battery
The IMP528 can also be operate from a single battery cell when a
regulated voltage higher than 2.0V is also available. This dual
supply configuration, shown in Figure 2, uses the regulated
4
I M P 5 2 8
I M P 5 2 8
V
IN
= 3.0V
Voltage
Battery
1. Larger values may be required depending upon supply impedance.
2. EN is connected to V
Note:
1. Murata part # LQH4N221K04 (DC resistance <5 Ω )
2. Larger values may be required depending upon supply impedance.
3. EN is connected to V
+
–
+
–
V
IN
220µH
0.1µF
0.1µF
DD
1
2
DD
L
1
to enable and to GND to disable.
to enable and to GND to disable.
FDLL400
L L
FDLL400
C
EN
S
C
EN
S
Figure 2. Dual Supply Operation
3
2
Figure 1. 3.0V Application
408-432-9100/www.impweb.com
10nF
200V
10nF
200V
910kΩ
Regulated Voltage
R
SW
(2.0V to 6.5V)
R
SW
1
2
3
4
voltage to operate the IMP528 while the energy for the high-
voltage boost circuit comes from the battery.
1
2
3
4
V
R
C
L
X
DD
SW-OSC
S
V
R
C
L
X
DD
SW-OSC
S
IMP528
2.7MΩ
IMP528
R
EL
R
R
EL
EL-OSC
R
GND
EL-OSC
GND
V
V
A
B
V
V
A
B
8
7
6
5
8
7
6
5
Application Information
EL lamp
10nF
(3 in
EL lamp
528_03.eps
2
528_04.eps
lamp)
© 2001 IMP, Inc.