IMP527 IMP Inc, IMP527 Datasheet - Page 5

• Manufacturer Part Number: IMP527
• Description: SINGLE CELL BATTERY POWERED ELECTROLUMINESCENT LAMP DRIVER/INVERTER
• Manufacturer: IMP Inc

Test Circuit
Figure 1 shows the IMP527 configured to drive an EL lamp,
© 2000 IMP, Inc.
Table 1. V
Notes. 2. Murata LQH4N331K04 (8.2 Ω max. DCR)
Table 2. V
Notes. 3. Coilcraft DS1608C-684 (2.2 Ω max. DCR)
represented as a 3nF capacitor.
R
C
R
C
IN
R
IN
R
C
C
D
D
L
L
SW
SW
SW
SW
EL
EL
S
S
= 1.5V
= 0.9V
OFF = 0V
V
ON = V
DD
Note:
1. Larger values may be required depending upon supply impedance.
* Optional
+
–
DD
0.1µF
R
R
V
V
V
V
SW-OSC
SW-OSC
DD
DD
DD
DD
C
C
V
1
V
L
L
S
, R
, R
S
, R
DD
DD
, R
X
, GND
, GND
X
1N4148
L
, C
, C
, L
, L
SW-OSC
SW-OSC
EL-OSC
EL-OSC
, GND
, GND
D
S
S
X
X
2
C
3
S
Figure 1. Test Circuit
0.1µF
100V
R
SW
C
0.1nF
SW
0.1µF/100V
0.1µF/100V
1N4148
2.62MΩ
1N4148
1
2
3
4
330µH
680µH
*
0.1nF
0.1nF
1MΩ
1MΩ
1MΩ
V
R
C
L
X
DD
SW-OSC
S
2
3
Electroluminescent Lamp Driver
IMP527
R
EL
R
EL-OSC
GND
V
V
A
B
8
7
6
5
Boost converter oscillator bias resistor
EL lamp driver oscillator bias resistor
Boost converter inductor
Boost converter storage capacitor
Switching diode
Noise-suppression capacitor (optional)
Boost converter oscillator bias resistor
EL lamp driver oscillator bias resistor
Boost converter inductor
Boost converter storage capacitor
Switching diode
Noise-suppression capacitor (optional)
Application Information
527_03.eps
I M P 5 2
I M P 5 2
3nF
7
7
5