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MSI logic gate, Switching regulator, LED driver, Laser driver, Transceiver
Text version of the page
Micrel MIC4830
July 2009 9 M9999-070709-C
Application Circuit
Figure 5: Typical Li-Ion Powered MIC4830 Circuit
Lamp Frequency (Hz)
100
200
300
400
500
600
700
800
900
Size (inch2)
Capacitance (nF)
REL (MŮ)
2.82
1.69
1.1
0.837
0.665
0.562
0.471
0.409
0.369
RSW (kŮ)
225
232
237
248
257
269
281
300
321
0.4
2
fSW (kHz)
160
155
152
145
140
134
128
120
112
RSW (kŮ)
232
250
277
300
346
395
473
1
5
fSW (kHz)
155
144
130
120
104
91
76
RSW (kŮ)
250
290
352
433
521
2
10
fSW (kHz)
144
124
102
83
69
RSW (kŮ)
272
363
480
3
15
fSW (kHz)
132
99
75
RSW (kŮ)
353
473
4
20
fSW (kHz)
102
76
Note: Table 1 applies to circuit shown in Figure 5.
Table 1: Recommended RSW & REL values for various panel sizes