User's Guide

SLVU460A – November 2011 – Revised July 2012

TPS84250EVM-001 2.5-A, Integrated Power Solution

Evaluation Module

The TPS84250EVM-001 evaluation module is designed as an easy-to-use platform for evaluating the

features and performance of the Integrated Power Solution (IPS) device. This user's guide provides

information on the correct usage of the TPS84250EVM-001 and an explanation of the numerous test

points on the board.

1

Description

The TPS84250EVM-001 evaluation module (EVM) features a TPS84250 device configured for operation

from a 7-V to 50-V input supply. The output voltage can be set to one-of-five popular values by using a

simple configuration jumper. Similarly, the switching frequency can be set to one-of-four values by use of

a jumper. The full, 2.5-A-rated output current can be supplied by the EVM. A minimal amount of input and

output capacitance is used on the board. Component pads are provided for additional input and output

capacitors if desired. A simple 5-V pullup supply for the PWRGD pin is provided on the EVM. It is powered

from the input voltage supply. Test points are provided that allow measurement of efficiency, power

dissipation, input ripple, output ripple, line and load regulation, soft-start behavior, transient response, and

undervoltage lockout (UVLO) behavior. The EVM uses a recommended printed-circuit board (PCB) layout

that maximizes thermal performance and minimizes output ripple and noise.

2

Getting Started

The host power supply is connected to the EVM at terminal block TB1. The Vin and GND terminals are

clearly marked. The terminal block can accept up to 16 AWG wire. For a complete evaluation, the host

supply must be adjustable up to 50 V and be capable of delivering at least 3 A of current. The output of

the EVM is presented to terminal block TB2. An electronic or resistive load can be connected to the block.

Input and output voltage test points are provided near the terminal blocks. These test points are intended

to be used as voltage monitoring points where voltmeters can be connected to measure Vin and Vout. Do

not use these test points as the input supply or output load connection points. The PCB traces connecting

to the test points are not designed to support high currents.

Before applying power, ensure that the Fsw select (J3) and Vout select (J4) jumpers are present and

properly positioned for the intended output voltage. SeeTable 1 for the recommended jumper setting.

Always remove power before changing the jumper settings.

Once the jumper settings have been confirmed, set the host input supply to a voltage level at least 3 volts

higher than the selected output voltage or 7 V, whichever is greater. (The minimum input voltage

specification for the TPS84250 is (Vout + 3) or 7 V, whichever is greater.) Turn the host supply on, and

then confirm that the selected output voltage is obtained.

Table 1. Output Voltage and Switching Frequency Jumper Settings

Vout Select, J2 (V)

Fsw Select, J1

Minimum V

2.5

400 kHz

7

3.3

400 kHz

7

5

500 kHz

8

12

800 kHz

15

15

1 MHz

18

2

TPS84250EVM-001 2.5-A, Integrated Power Solution Evaluation Module

SLVU460A – November 2011 – Revised July 2012

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