Test Setup And Results - Texas Instruments TPS51385EVM User Manual

Implementation Results
3 Implementation Results
This section describes how to properly connect, set up, and use the TPS51385EVM. The section also includes
test results typical for the evaluation modules.
3.1 Evaluation Setup
1. Make sure that the jumper at JP2 (Enable High Control) is covered to connect VIN to pin 1 of JP3. Also
make sure JP3 (Enable Control) pin 2 and 3 are covered to shunt EN to GND to disable the output.
2. Apply appropriate input voltage to VIN (J1-1) or TP1 and GND (J1-2) or TP8. Connect a power supply
capable of supplying 7-A to J1 through a pair of 20AWG wires. Note that the board cannot support hot
plug-in. The input lines must be connected between J1 and an external power source first before turning on
the power source.
3. Move the jumper at JP3 (Enable Control) from pin 2 and 3 (EN and OFF) to pin 2 and 1 (EN and ON) and
make sure JP2 pin 1 and pin 2 are covered. Then, the output can be enabled.
4. Apply the loading to VOUT (J2-2) or TP4 and GND (J2-1) or TP10. The load must be connected to J2
through a pair of 20AWG wires. The maximum load current capability is 7 A. Minimize wire lengths to reduce
losses in the wires.

3.2 Test Setup and Results

3.2.1 Start-Up
The following figures show the TPS51385EVM start-up waveform relative to EN.
EN=5V/div
VOUT=2V/div
PG=5V/div
IL=2A/div
4 TPS51385 Step-Down Converter Evaluation Module
Figure 3-1. Start-Up Relative to EN, I
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= 0.1 A (2ms/div)
OUT
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SLUUCX3 – AUGUST 2023
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