Texas Instruments TPS56C20, User Manual

4 Test Setup and Results

This section describes how to properly connect, set up, and use the TPS56C20EVM-614. The section also 
includes test results typical for the evaluation modules and efficiency, output load regulation, output line 
regulation, load transient response, output voltage ripple, start-up, and shutdown.

4.1 Input/Output Connections

The TPS56C20EVM-614 provides input/output connectors and test points as shown in 

Table 4-1

. The design 

requires a power supply capable of supplying 4 A to connect to J1 through a pair of 20-AWG wires. The design 
requires the load to connect to J3 through a pair of 20-AWG wires. The maximum load current capability is 12 
A. Wire lengths must be minimized to reduce losses in the wires. Test point TP3 provides a place to monitor the 
VIN input voltages with TP4 (which provides a convenient ground reference). The design uses TP6 to monitor 
the output voltage with TP7 as the ground reference.

Table 4-1. Connection and Test Points

Reference 

Designator

Function

J1

PVIN input voltage connector (See 

Table 1-1

 for 

PVIN range)

J2

VIN input voltage connector. Not normally used

J3

VOUT, 1.1V at 12A maximum

JP1

PVIN to VIN jumper. Normally closed

JP2

I2C interface pull up jumper for SDA

JP3

I2C interface pull up jumper for SCL

JP4

I2C interface grounding jumper for A1

JP5

I2C interface grounding jumper for A0

JP6

Enable Jumper. Close to disable, open to 
enable

TP1

GND test point for VIN connector

TP2

VIN test point

TP3

PVIN test point

TP4

GND test point for PVIN connector

TP5

SW test point

TP6

Output voltage test point at VOUT connector

TP7

GND test point at VOUT connector

TP9

Analog GND test point

TP10

Test point in voltage divider network. Used for 
loop response measurements

4.2 Start Up Procedure

Using the following procedure ensures a successful start up:

1. Make sure that the Enable jumper JP6 is closed to shunt EN to GND, disabling the output.
2. Apply the appropriate V

IN

 voltage to PVIN (J1-1) and GND (J1-2).

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Test Setup and Results

SBAU227A – MARCH 2014 – REVISED JUNE 2021

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