Texas Instruments TPS54521EVM-607, Руководство пользователя

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2.5 Load Transients
Figure 2-5 shows the TPS54521EVM-607 response to load transients. The current step is from 2 A to 4 A at 12
V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output.
Time = 10 μsec / div
Vout = 100 mV / div (AC coupled)
Iout = 2 A / div (2A to 4 A load step)
Vin = 12 V
Figure 2-5. TPS54521EVM-607 Transient Response
2.6 Loop Characteristics
Figure 2-6 shows the TPS54521EVM-607 loop-response characteristics. Gain and phase plots are shown for V
IN
voltage of 12 V. Load current for the measurement is 5 A.
-60
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
Frequency - Hz
-180
-150
-120
-90
-60
-30
0
30
60
90
120
150
180
Gain - dB
100 1000 10000 100000 1000000
Phase - Deg
Phase
Gain
Vin = 12 V
Load = 5 A
Figure 2-6. TPS54521EVM-607 Loop Response
Test Setup and Results www.ti.com
8 TPS54521 Step-Down Converter Evaluation Module User's Guide SLVU379A – AUGUST 2010 – REVISED AUGUST 2021
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