Texas Instruments tps61040EVM-002, Руководство пользователя

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LED Ripple Current
2-6
2.5 LED Ripple Current
Figure 2−2 shows the output ripple current with Iout = 20 mA. The top
oscilloscope trace shows the ripple with 3.6-V input, and the bottom trace
shows the ripple with a 4.2-V input. The difference in switching frequency
between the two traces is expected and is explained in the data sheet.
Figure 2−2. Output Ripple Current
2
µ
s
2 mA/div
:M1
1
2
µ
s
12.4 mV
0.2 V
0.1 V
10 mV
2
3
4
1
BWL
DC
x10
DC
x10
DC
DC 1 DC 45 mV
200 MS/s
STOPPED
A
2
µ
s
2 mA/div