Texas Instruments TPS54320, Руководство пользователя

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2.5 Load Transients
Figure 2-5 shows the TPS54320 response to load transients. The current step is from 25% to 50% of maximum
rated load at 12 V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the
output.
I = 500 mA/div
(0.75 to 1.5 A load step)
OUT
V = 12 V
IN
t - Time - 20 s/div
m
V = 50 mV/div (AC coupled)
OUT
Figure 2-5. TPS54320 Transient Response
2.6 Loop Characteristics
Figure 2-6 shows the TPS54320 loop-response characteristics. Gain and phase plots are shown for V
IN
of 12 V.
Load current for the measurement is 3 A.
-60
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
100 1k 10k 100k 1M
f - Frequency - Hz
-180
-150
-120
-90
-60
-30
0
30
60
90
120
150
180
Phase
Gain
Gain-dB
Phase-deg
Figure 2-6. TPS54320 Loop Response
www.ti.com Test Setup and Results
SLVU380A – SEPTEMBER 2010 – REVISED OCTOBER 2021
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TPS54320 Step-Down Converter Evaluation Module User's Guide 7
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