SP4425 Datasheet, PDF (10/14 Pages) Sipex Corporation – Electroluminescent Lamp Driver Low Voltage 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.
SP4425 Total Supply Current vs. Temperature
SP4425 Lamp Frequency vs. Temperature
40
35
30
25
20
15
10
5
0
-40
0
25
70
Temperature (^OC)
Coil=470µH/4Ω; C_OSC=180pF;
C_INT=1800pF; C_LOAD=4.7nF
1.5V
1.1V
85
Peak-to-Peak Voltage vs. Temperature
700
600
500
400
300
200
100
0
-40
0
25
70
Temperature (^OC)
Coil=470µH/4Ω;
C =180pF;
OSC
C_INT=1800pF; C_LOAD=4.7nF
1.5V
1.1V
85
Lamp Frequency vs. Temperature
200
150
100
50
0
-40
0
25
70
Temperature (^OC)
Coil=470µH/4Ω; C_OSC=180pF;
C_INT=1800pF; C_LOAD=4.7nF
1.5V
1.1V
85
800
700
600
500
400
300
200
100
0
-40
0
25
70
Temperature (^OC)
Coil=2mH/44Ω; C_OSC=180pF;
C_INT=470pF; C_LOAD=4nF
3.0V
2.2V
85
Light Output vs. Temperature
25
20
15
10
5
0
-40
0
25
70
85
Temperature (^OC)
Coil=2mH/44Ω; C_OSC=180pF;
C_INT=470pF; V_DD=3.0V; Load=3 sq.in.
SP4425 Peak-to-Peak Voltage vs. Temperature
Total I_CC @3V_DD vs. Temperature
40
35
30
25
20
15
10
5
0
-40
0
25
70
85
Temperature (^OC)
Coil=2mH/44Ω;
C =180pF;
OSC
C_INT=470pF; C_LOAD=4nF
250
200
150
100
50
0
-40
0
25
70
Temperature (^OC)
Coil=2mH/44Ω; C_OSC=180pF;
C_INT=470pF; C_LOAD=4nF
SP4425DS/20
3.0V
2.2V
85
SP4425 Electroluminescent Lamp Driver
10
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