SLVUBJ9A July   2020  – October 2020 TPS54JB20

 

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2.1 Input/Output Connections

The TPS54JB20EVM is provided with input/output connectors and test points as shown in Table 2-1. A power supply capable of supplying greater than 15 A must be connected to J1 and J2 through a pair of 20-AWG wires or better. The load must be connected to J3 and J4 through a pair of 20-AWG wires or better on each connector. The maximum load current capability is 20 A.

Wire lengths must be minimized to reduce losses in the wires. Test point VIN_SENSE+ provides a place to monitor the input voltage with Test point VIN_SENSE– providing a convenient ground reference. Test point VOUT+ is used to monitor the output voltage with VOUT– as the ground reference.

Table 2-1 TPS54JB20EVM EVM Connectors and Test Points
REFERENCE DESIGNATOR FUNCTION
J1 VIN input voltage connector (see Table 1-1 for VIN range)
J2 PGND connection for input
J3 VOUT, 3.3 V at 20 A maximum
J4 PGND connection for output
J5 3-pin header for enable. ON -> Connects EN to VIN to enable the device. OFF- > Connects EN to GND to disable device. Floating EN will prevent the part from operating.
J6 12-pin header for mode selection (see Table 1-3)
VIN_SENSE+, VIN_SENSE– VIN voltage sensing test points
VOUT+, VOUT– VOUT voltage sensing test points
VCC, PGND VCC voltage forcing/sensing test points
PGOOD PGOOD output test point (pulled up to VCC pin through a 30-kΩ resistor)
EN EN test point
VSNS+, VSNS– Remote sensing test points
AGND AGND test point
BODE+, BODE– Loop measurement test points (BODE+ is at the same net as VOUT, but is closer to FB divider and IC)
SS/REFIN Can be used to monitor the reference voltage
SW Switch Node test point