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參數(shù)資料
| 型號： | SP4439 |
| 英文描述： | Ultra-Quiet Electroluminescent Lamp Driver with Programmable Wave Shape(超靜場致發(fā)光燈驅(qū)動器（可編程波形）) |
| 中文描述： | 超靜音電致發(fā)光燈帶可編程波形（超靜場致發(fā)光燈驅(qū)動器（可編程波形）驅(qū)動程序） |
| 文件頁數(shù)： | 9/13頁 |
| 文件大小： | 193K |
| 代理商： | SP4439 |
9
Rev. 2/15/01 SP4439 Ultra-Quiet Electroluminescent Lamp Driver With Programmable Waveshape Copyright 2000 Sipex Corporation
Figure 8. The SP4439 supply current remains at 20mA,
independent of EL lamp area.
Figure 7. Single Ended and Differential Output
Waveforms for the SP4439. CH1 and CH2 are single
ended waveform. CH4 is a differential waveform.
0
5
10
15
20
25
1.0 1.2
1.4 1.6
1.8 2.0
2.2
2.4
2.6 2.8
3.0
Lamp Size (in
2
)
I
D
Figure 9. The V
lamp voltage decreases with
increasing EL lamp size for a fixed set of circuit
conditions like those identified in Figures 1 and 2.
Lower V
PP
means a less brightly lit lamp.
Figure 11. Lamp frequency remains relatively constant
over the bias supply voltage. Lamp light does not visibly
decrease over the typical battery operating range.
Figure 10. Luminance of the EL lamp as a function of
its size. For a fixed set of circuit conditions, lamp
brightness decreases as a function of lamp size.
Figure 12. Peak lamp voltage increases almost linearly
with increasing supply bias voltage. Increasing the
supply increases lamp brightness.
0
20
40
60
80
100
120
140
160
180
200
O
P
)
1.0 1.2
1.4 1.6
1.8 2.0
2.2
2.4
2.6 2.8
3.0
Lamp Size (in
2
)
0
5
10
15
20
1.0
1.5
2.0
3.0
Lamp Size (in
2
)
L
2
)
30
2.5
250
255
260
265
270
275
2.5
2.9
3.1
3.5
V
DD
(Volts)
L
280
3.3
2.7
3.7
120
130
140
150
160
170
2.5
2.9
3.1
3.5
V
DD
(Volts)
L
P
)
180
3.3
2.7
3.7
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