Texas Instruments TPS53319EVM-136, User Manual

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TP11 TP2
Metal Ground Barrel
Probe Tip
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Test Setup
4 Test Setup
4.1 Test Equipment
Voltage Source:
The input voltage source Vin should be a 0-20V variable DC source capable of supplying 10Adc. Connect
Vin to J1 as shown in
Figure 3 .
Multimeters:
V1: Vin at TP1 (Vin) and TP10 (GND). V2: Vout at TP2 (Vout) and TP11 (GND). A1: Vin input current
Output Load:
The output load should be an electronic constant resistance mode load capable of 0-16Adc at 1.5V.
Oscilloscope:
A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope should be set
for 1M
Ω impedance, 20MHz Bandwidth, AC coupling, 2us/division horizontal resolution, 20mV/division
vertical resolution. Test points TP2 and TP11 can be used to measure the output ripple voltage by placing
the oscilloscope probe tip through TP2 and holding the ground barrel on TP11 as shown in
Figure 2 .
Using a leaded ground connection may induce additional noise due to the large ground loop.
Figure 2. Tip and Barrel Measurement for Vout Ripple
Recommended Wire Gauge:
1. V
IN
to J1(12V input):
The recommended wire size is AWG #16 per input connection, with the total length of wire less than 4
feet (2 feet input, 2 feet return).
2. J2 to LOAD:
The minimum recommended wire size is AWG #14, with the total length of wire less than 4 feet (2 feet
output, 2 feet return)
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