Micrel
MIC4830
Application Circuit
Figure 5: Typical Li-Ion Powered MIC4830 Circuit
Lamp Frequency
Size
100 200 300
400
500
600
700
800
900
Capacitance
(Hz)
(inch2)
(nF)
R
R
EL (MΩ
)
)
2.82 1.69 1.1 0.837 0.665 0.562 0.471 0.409 0.369
SW (kΩ
225 232 237
160 155 152
232 250 277
155 144 130
250 290 352
144 124 102
272 363 480
248
145
300
120
433
83
257
140
346
104
521
69
269
134
395
91
281
128
473
76
300
120
321
112
0.4
1
2
f
R
f
R
f
R
f
R
SW (kHz)
SW (kΩ
SW (kHz)
SW (kΩ
SW (kHz)
SW (kΩ
SW (kHz)
SW (kΩ
SW (kHz)
)
5
)
2
10
15
20
)
3
132
353 473
102 76
99
75
)
4
f
Note: Table 1 applies to circuit shown in Figure 5.
Table 1: Recommended RSW & REL values for various panel sizes
M9999-091307
(408) 955-1690
September 2007
9
MICREL [ MICREL SEMICONDUCTOR ]
