Texas Instruments TPS62851 EVM-139 Series, User Manual, Page: 3 / 16

2 Setup
This section describes how to correctly use the TPS62851xEVM-139.
2.1 Connector Descriptions
J1, Pin 1 and 2 – VIN Positive input voltage connection from the input supply for the EVM
J1, Pin 3 and 4 – S+/S– Input voltage sense connections. Measure the input voltage at this point.
J1, Pin 5 and 6 – GND Input return connection from the input supply for the EVM
J2, Pin 1 and 2 – VOUT Positive output voltage connection
J2, Pin 3 and 4 – S+/S– Output voltage sense connections. Measure the output voltage at this point.
J2, Pin 5 and 6 – GND Output return connection
JP1 – EN EN pin jumper. Place the supplied jumper across ON and EN to turn on the IC. Place the jumper
across OFF and EN to turn off the IC.
JP2 – MODE/SYNC MODE/SYNC pin jumper. Place the supplied jumper across VIN and MODE/SYNC to force the
device in fixed frequency PWM operation at all load currents. Place the jumper across MODE/SYNC
and GND to enable power save mode. Connect a clock signal to MODE/SYNC referenced to GND to
synchronize the switching frequency to the clock signal.
JP3 – PG The PG output appears on pin 1 of this header with a convenient ground on pin 2.
2.2 Hardware Setup
To operate the EVM, set jumpers JP1 and JP2 to the desired positions per Section 2.1 . Connect the input supply
to J1 between VIN and GND and connect the load to J2 between VOUT and GND.
3 TPS62851xEVM-139 Test Results
The TPS62851xEVM-139 was used to take the typical characteristics data in the TPS62851x data sheet. See
the
TPS62851x 2.7-V to 6-V Adjustable-Frequency Step-Down Converter in SOT583 Package Data Sheet for
the performance of this EVM.
www.ti.com Setup
SLVUBY6A – AUGUST 2020 – REVISED JUNE 2021
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TPS62851xEVM-139 Evaluation Module 3
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