MIC4833 Datasheet, PDF (9/12 Pages) Micrel Semiconductor – Low Noise Dual 220 VPP EL Driver With Output Voltage Slew Rate Control

Micrel
Application Circuit
VIN
Li Ion
3V to 4.2V
C1
0.01µF
High
Low
High
Low
ENA
SLEW
RSW
332k
REL
1.78M
High
Low
VDD
ELA
RSW
REL
MIC4833
ELB
COM
ENB
CS
GND
SW
RSLEW
50k
EL Lamp A
EL Lamp B
VIN
Li Ion
3V to 4.2V
C2
10µF
L1
220µH
C3
2.2nF
250V
Figure 6: Typical Li-Ion Powered MIC4833 Circuit
MIC4833
Note: Table 2 applies to circuit shown in Figure 6.
Total
Panel
Area
(inch²)
0.4
1
2
3
4
5
6
8
Capacitance
(nF)
2
5
10
15
20
25
30
40
Panel
Frequency
(Hz)
R_EL (MΩ)
R_SW (kΩ)
f_SW (kHz)
R_SW (kΩ)
f_SW (kHz)
R_SW (kΩ)
f_SW (kHz)
R_SW (kΩ)
f_SW (kHz)
R_SW (kΩ)
f_SW (kHz)
R_SW (kΩ)
f_SW (kHz)
R_SW (kΩ)
f_SW (kHz)
R_SW (kΩ)
f_SW (kHz)
150
2.80
324
138
357
125
402
112
464
98
523
86
619
72
698
65
1000
45
200
2.10
340
132
365
122
453
100
511
88
665
68
825
55
953
47
250
1.69
357
126
392
116
487
92
590
77
750
60
909
50
1000
45
300
1.40
383
118
422
108
549
83
698
65
909
50
1000
45
350
1.21
392
116
442
102
590
76
768
58
1000
45
Table 2: Recommended R_SW & R_EL Values For Total Panel Sizes
400
1.05
402
112
475
95
649
70
909
50
1000
45
500
.850
442
102
511
88
681
66
1000
45
October 2008
9
M9999-100308
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