IMP525 IMP Inc, IMP525 Datasheet - Page 5

• Manufacturer Part Number: IMP525
• Description: SINGLE CELL BATTERY POWERED ELECTROLUMINESCENT LAMP DRIVER/INVERTER
• Manufacturer: IMP Inc

Test Circuit
Figure 1 shows the IMP525 configured to drive an EL lamp,
Table 1. V
Notes. 2. Murata LQH4N331K04 (8.2 max. DCR)
Table 2. V
Notes. 3. Coilcraft DS1608C-684 (2.2 max. DCR)
represented as a 3nF capacitor.
Component
Component
R
R
IN
R
IN
R
C
C
OFF = 0V
D
D
L
L
SW
SW
EL
V
EL
ON = V
S
S
DD
= 1.5V
= 0.9V
Note:
1. Larger values may be required depending upon supply impedance.
+
–
DD
0.1 F
Connections
Connections
1
V
V
V
V
DD
DD
DD
DD
C
C
V
V
L
1N4148
L
, R
S
S
DD
, R
L
, R
, R
DD
, GND
X
, GND
X
, C
, C
, L
, L
D
SW-OSC
SW-OSC
EL-OSC
EL-OSC
C
S
X
X
S
2
S
3
0.1 F
100V
Figure 1. Test Circuit
R
SW
0.1 F/100V
0.1 F/100V
1
2
3
4
1N4148
2.62M
1N4148
330 H
680 H
Value
Value
1.0M
1M
1M
V
R
C
L
X
DD
SW-OSC
S
IMP525
2
3
R
EL
R
EL-OSC
GND
V
V
A
B
8
7
6
5
Description
Boost converter oscillator bias resistor
EL lamp driver oscillator bias resistor
Boost converter inductor
Boost converter storage capacitor
Switching diode
Description
Boost converter oscillator bias resistor
EL lamp driver oscillator bias resistor
Boost converter inductor
Boost converter storage capacitor
Switching diode
Application Information
525_03.eps
3nF
IMP525
IMP525
5