TPS61199
www.ti.com
SLVSAN3 –DECEMBER 2010
0.48
0.44
100
0.40
0.36
0.32
0.28
0.24
10
0.20
0.16
1
0.12
0.08
0.04
0
0.1
1
2
3
4
5
6
7
8
9
10
0
20
40
60
80
100
PWM On Time - ms
PWM Duty Cycle - %
Figure 4. Dimming Linearity
Figure 5. Dimming With Short On Time
60
IFB1
10 V/div
DC
59.8
59.6
59.4
59.2
59
VOUT
200 mV/div
AC
Total LED
500 mA/div
DC
58.8
58.6
t - Time - 10 ms/div
IFB1 IFB2 IFB3 IFB4 IFB5 IFB6 IFB7 IFB8
Figure 6. Current Matching
Figure 7. Dimming Waveforms
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