Texas Instruments TPS40345EVM-353, User Manual, Page: 12 / 23

-60
-40
-20
0
20
40
60
80
100
0.1 1 10 100 1000
f - Frequency - kHz
-135
-90
-45
0
45
90
135
180
225
Gain
Phase
Gain-dB
Vin = 14V, Vout = 1.2 V, Iout = 20 A
Switching
TPS40345EVM-353 Test Data
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12 SNVU588 – November 2017
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TPS40345EVM-353 Evaluation Module
6.4 Switch Node
V
IN
= 12V, V
OUT
= 1.2V, I
OUT
= 20 A
Ch1: TP12 (HDRV), Ch2:13 TP (SW), Ch3: TP14 (LDRV)
Figure 8. TPS40345EVM-353 Switching Waveforms
6.5 Control Loop Bode Diagram
V
IN
= 14V, V
OUT
= 1.2V, I
OUT
= 20A, Bandwidth: 73kHz, Phase Margin: 47°
Figure 9. TPS40345EVM-353 Gain and Phase vs Frequency