TP4 /
TP19
TP3 /
TP18
Metal Ground Barrel
Probe Tip
Tip and Barrel Vout ripple
measurement
Figure 4-2. Output Ripple Measurement – Tip and Barrel Using TP3 and TP4 or TP18 and TP19
Network
Analyzer
Isolation
Transformer
FAN
V1
+
-
A1
-
+
V
VIN
LOAD1
3.3V @
1.5A
-
+
V2
+
-
LOAD2
1.2V @
2.5A
+
-
V3
-
+
Figure 4-3. Control Loop Measurement Setup
4.3 Start-Up/Shutdown Procedure
1. Increase V
IN
from 0 Vdc to 12 Vdc.
2. Vary LOAD1 from 0 Adc to 1.5 Adc.
3. Vary LOAD2 from 0 Adc to 2.5 Adc.
4. Vary V
IN
from 9.6 Vdc to 13.2 Vdc.
Test Setup
SLVU356A – JANUARY 2010 – REVISED OCTOBER 2021
TPS54291 Step-Down Converter Evaluation Module User's Guide
9
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