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4 Test Setup and Results
This section describes how to properly connect, set up, and use the TPS51386EVM. The section also includes
test results typical for the evaluation modules.
4.1 Input and Output Connections
The TPS51386EVM is provided with input and output connectors and test points as shown in
a power supply capable of supplying 8 A to J1 through a pair of 20AWG wires. The load must be connected
to J2 through a pair of 20AWG wires. The maximum load current capability is 8 A. Minimize wire lengths to
reduce losses in the wires. Test point TP2 provides a place to monitor the V
a convenient ground reference. TP5 is used to monitor the output voltage with TP12 as the ground reference.
Reference
Designator
J1
J2
JP1
JP2
JP3
JP4
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
TP10
TP11
TP12
TP13
TP14
TP15
TP16
TP17
TP18
TP19
4.2 Start-Up Procedure
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. 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.
SLUUCN0B – JUNE 2022 – REVISED AUGUST 2023
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Table 4-1. Connection and Test Points
V
(see
Table 1-1
for V
range)
IN
IN
V
, 5.1 V at 8-A maximum
OUT
PG pullup control. Short pin 1 and pin 2 to pull PG up to VCC. Short pin 2 and
pin 3 to pull PG up to VOUT.
EN high control. Short pin 1 and pin 2 to connect VIN to pin 1 of JP3.
EN control. Short pin 1 and pin 2 of JP2 to make EN high.
Mode control. Float or short pin 2 and pin 3 to set PSM mode. Short pin 2 and
pin 1 to set OOA mode.
V
positive monitor point
IN
V
positive test point
IN
Switch node test point
V
positive monitor point
OUT
V
positive test point
OUT
EN test point
PG test point
GND monitor point
GND test point
GND monitor point
Loop test point
GND test point
LDO output monitor point (for TPS51383EVM and TPS51384EVM)
LDO output test point (for TPS51383EVM and TPS51384EVM)
VCC test point
GND test point
GND test point
GND test point
GND monitor point
Copyright © 2023 Texas Instruments Incorporated
input voltages with TP9 providing
IN
Function
TPS51386 Step-Down Converter Evaluation Module
Test Setup and Results
Table
4-1. Connect
3
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