Texas Instruments TPS40345EVM-353, Руководство пользователя, Страница: 8 / 23

TP4 TP3
Metal Ground Barrel
Probe Tip
Tip and Barrel Vout ripple
measurement
LOAD1
1.2V @
20A
+
-
FAN
V2
-
+
See Tip and Barrel
Measurement for
Vout ripple
V1
+
-
A1
-
+
V
IN
Oscilloscope
1M W , AC
20mV / div
20MHz
Test Setup
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8 SNVU588 – November 2017
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TPS40345EVM-353 Evaluation Module
4. Connect ammeter A1 between VIN and J1 as shown in Figure 2 .
5. Connect voltmeter V1 to TP1 and TP2 as shown in Figure 2 .
6. Connect voltmeter V2 to TP3 and TP4 as shown in Figure 2 .
7. Connect oscilloscope probes to desired test points per Table 2 .
8. Place fan as shown in Figure 2 and turn on making sure to blow air directly across the evaluation
module.
5.2.2 Diagram
Figure 2. TPS40345EVM-353 Recommended Test Set-Up
Figure 3. Output Ripple Measurement – Tip and Barrel using TP3 and TP4