5 Test Setup
5.1 Test Equipment
Voltage Source:
The input voltage source V
IN
must be a 0-V to 14-V variable DC source capable of supplying
10 A
DC
. Connect V
IN
.
Multimeters:
•
V1:
V
IN
at TP1 (VIN) and TP4 (GND)
•
V2:
V
OUT
at TP7 (VOUT) and TP9 (GND)
Output Load:
The output load must be an electronic constant resistance mode load capable of 15 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 the following:
• 1-MΩ impedance
• 20-MHz bandwidth
• AC coupling
• 1-µs/div horizontal resolution
• 20-mV/div vertical resolution
Test points TP7 and TP9 can be used to measure the output ripple voltage by placing the oscilloscope probe tip
through TP7 and holding the ground barrel on TP9 as shown in
. Using a leaded ground connection
may induce additional noise due to the large ground loop.
T 9
P
T 7
P
Metal Ground Barrel
Probe Tip
Figure 5-1. Tip and Barrel Measurement for V
OUT
Ripple
Recommended Wire Gauge:
•
VIN to J1 (12V input):
The recommended wire size is 1× AWG #14 per input connection, with the total length
of wire less than four feet (two feet input, two feet return).
•
J3 to LOAD:
The minimum recommended wire size is 2× AWG #14, with the total length of wire less than
four feet (two feet output, two feet return).
Test Setup
4
TPS53513 Step-Down Converter Evaluation Module User's Guide
SLUUAQ0C – OCTOBER 2013 – REVISED NOVEMBER 2021
Copyright © 2021 Texas Instruments Incorporated
