5 Test Setup
5.1 Test Equipment
Voltage Source (VIN):
The input voltage source, (VIN), should be a 0-V to 15-V variable DC source capable of
supplying 2 A
DC
. Connect VIN to J2 as shown in
.
Multimeters:
•
V1:
VIN at TP3 (VIN) and TP6 (GND), 0-V to 15-V voltmeter
•
V2:
VOUT at TP10 (VOUT) and TP8 (GND)
•
A1:
VIN input current, 0-A
DC
to 2-A
DC
Ammeter
Output Load:
The output load should be an electronic constant resistance mode load capable of 0 A
DC
to 6 A
DC
at 1.2 V.
Oscilloscope:
A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope
should be set for 1-MΩ impedance, 20-MHz bandwidth, AC coupling, 1-µs/div. horizontal resolution, 20-mV/div.
vertical resolution. Test points TP10 and TP8 can be used to measure the output ripple voltage by placing the
oscilloscope probe tip through TP10 and holding the ground barrel on TP8 as shown in
leaded ground connection may induce additional noise due to the large ground loop.
TP10
TP8
Figure 5-1. Tip and Barrel Measurement for VOUT Ripple
Fan:
Some of the components in this EVM may approach temperatures of 80°C during operation. A small
fan capable of 200 LFM to 400 LFM is recommended to reduce component temperatures while the EVM is
operating. The EVM should not be probed while the fan is not running.
Recommended Wire Gauge:
•
VIN to J2:
The recommended wire size is 1x AWG #16 per input connection, with the total length of wire less
than 4 feet (2 feet input, 2 feet return).
•
J5 to LOAD:
The minimum recommended wire size is 1x AWG #16, with the total length of wire less than 4
feet (2 feet output, 2 feet return).
Test Setup
SLUU819A – DECEMBER 2011 – REVISED DECEMBER 2021
TPS53313 Step-Down Converter Evaluation Module User's Guide
5
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