IMP560 IMP Inc, IMP560 Datasheet - Page 6

• Manufacturer Part Number: IMP560
• Description: POWER EFFICIENT EL LAMP DRIVER
• Manufacturer: IMP Inc

Enable/Disable Operation
Figure 3 shows the IMP560 can be enabled via a logic gate that con-
nects R
be connected either to V
Dual Supply Operation with 1.5V Battery
The IMP560 can also be operate from a single battery cell when a
regulated voltage higher than 2.0V is also available. The dual
supply configuration, shown in Figure 4, uses the regulated
voltage to operate the IMP560 while the energy for the high-
voltage boost circuit comes from the battery. The current to run
the internal logic is typically 420µA.
6
I M P 5 6 0
I M P 5 6 0
SW
to V
DD
Voltage
Battery
, and disabled by connecting it to ground. R
OFF = 0V
ON = V
OFF = 0V
ON = V
* Larger values may be required
V
Note:
1. Murata part # LQH4N561K04 (DC resistance <14.5 Ω )
2. Larger values may be required depending upon supply impedance.
depending upon supply impedance
V
IN
IN
+
–
DD
+
–
DD
DD
or to the gate.
Figure 4. Dual Supply Operation with High Battery Voltages
0.1µF
15V
0.1µF
L
L
1
2
*
CMOS
1N4148
Gate
1N4148
Figure 3. Enable/Disable Operation
C
S
408-432-9100/www.impweb.com
0.1µF
100V
0.1µF
100V
R
R
Regulated Voltage
SW
SW
(2.0V to 6.5V)
EL
may
The circuit of Figure 4 can also be used with batteries that exceed
6.0V as long as V
1
2
3
4
1
2
3
4
V
R
C
L
V
R
C
L
X
DD
SW-OSC
S
X
DD
SW-OSC
S
IMP560
IMP560
R
R
EL
EL
R
Ground
R
EL-OSC
EL-OSC
GND
V
GND
DD
DD
V
V
V
V
A
B
A
B
does not exceed 6.5V.
8
7
6
5
8
7
6
5
EL lamp
EL lamp
560_11.eps
560_12.eps
Disabled
Enabled
© 2000 IMP, Inc.