Datasheet

TPS40322
SLUSAF8D –JUNE 2011–REVISED JANUARY 2014 www.ti.com
Figure 28 shows the switching waveform, V
IN
= 12 V, I
OUT1
= I
OUT2
= 10 A, Ch.1 = HDRV1, Ch.2 = LDRV1, Ch.3
= VOUT1 ripple. The high-frequency noise is caused by parasitic inductive and capacitive elements interacting
with the high energy, rapidly switching power elements resulting in ringing at the transition points. Capacitive
filtering at the load input will successfully attenuate these noise spikes.
Figure 28. Design Example 1 Switching Waveform
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