SP4423 Datasheet, PDF (6/13 Pages) Sipex Corporation – Electroluminescent Lamp Driver Low Power Applications

The following performance curves are intended to give the designer a relative scale from which to optimize
specific applications. Absolute measurements may vary depending upon the brand of components chosen.
800
700
600
500
400
300
200
100
0
0
Lamp Frequency vs. C_OSC
X
X
50 100
X
X
150 200 250
C (pF)
OSC
X
300 350
Inductors
Coil = 9/35
Coil = 5/18
Coil = 3/10
X Coil = 1/14
400
Lamp = 1sq. in., V_DD = 3.0V
20.0
18.0
16.0
14.0
12.0
10.0
0.8
0.6
0.4
0.2
0.0
0
Coil Frequency vs. C_OSC
X
X
50 100
X
X
150 200 250
C (pF)
OSC
X
300 350
Inductors
Coil = 9/35
Coil = 5/18
Coil = 3/10
X Coil = 1/14
400
Lamp = 1sq. in., V_DD = 3.0V
45
40
35
30
25
20
15
10
5
0
0
X
X
X
I_TOTAL vs. C_OSC
X
X
X
Inductors
Coil = 9/35
Coil = 5/18
Coil = 3/10
X Coil = 1/14
50 100 150 200 250 300 350 400
C (pF)
OSC
Lamp = 1sq. in., V_DD = 3.0V
14
12
10
8
6
4
2
0
2.0
I_TOTAL vs. V_DD over Temperature
2.5 3.0
3.5 4.0 4.5
V (V)
DD
5.0 5.5
Temperature (^oC)
0^OC
25^OC
75^OC
6.0
Coil = 20mH/70 ohms, C_OSC = 150pF
250
200
150
100
50
0
0
V_PEAK vs. C_OSC
X XX
50 100
XX
150 200 250 300
C (pF)
OSC
X
Inductors
Coil = 9/35
Coil = 5/18
Coil = 3/10
X Coil = 1/14
350 400
Lamp = 1sq. in., V_DD = 3.0V
160
140
120
100
80
60
40
20
0
2.0
V_PEAK vs. V_DD over Temperature
2.5 3.0
3.5 4.0 4.5
V (V)
DD
5.0 5.5
Temperature (^oC)
0^OC
25^OC
75^OC
6.0
Coil = 20mH/70 ohms, C_OSC = 150pF
16
14
12
10
8
6
4
2
0
0
Light vs. C_OSC
X
X
X
X
X
Inductors
Coil = 9/35
Coil = 5/18
Coil = 3/10
X
X Coil = 1/14
50 100 150 200 250 300 350 400
C (pF)
OSC
Lamp = 1sq. in., V_DD = 3.0V
Lamp Frequency vs. V_DD over Temperature
350
300
250
200
150
Temperature (^oC)
100
0^OC
50
25^OC
0
75^OC
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V (V)
DD
Coil = 20mH/70 ohms, C_OSC = 150pF
SP4423DS/14
SP4423 Electroluminescent Lamp Driver
6
© Copyright 2000 Sipex Corporation