User manual

Host

Computer

DC Power

Supply

Load

remove

jumper

Test Setup

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4.3.2 J10 – CTRL

This is the interface connector for the CTRL interface. Connect the 10-pin ribbon cable between this

connector and the I/O connector of the USB interface adapter.

5 Test Setup

5.1 EVM Operation

The user must connect an input power supply set between 2.3 V and 5.5 V between headers J1 and J3 in

order for the EVM to operate. The absolute maximum input voltage is 7 V.

The user can connect a load resistance between the positive and negative output voltage, J4 and J7, or

the two output voltages and GND, J4 and J6, and J7 and J9.

5.2 Software Setup To Change Negative Output Voltage

The software is not needed for testing the standard operation of the TPS65137AEVM, but if changing the

negative output voltage is necessary, the software has to be installed, and the USB interface adapter used

with a host computer.

For the newest software version, go to the TPS65137A product folder on the TI Web site

(http://focus.ti.com/docs/prod/folders/print/tps65137.html), download the software (zipped file), unpack it,

and execute the setup.exe file. This installs the newest software version on your PC. It is recommended to

remove older versions before installing the newest one.

5.3 Hardware Setup

Figure 2 details the connection of the power supply, the load, and the host computer. The host computer

is just required if a voltage change on the negative rail is needed. The connection of the load is just an

example; the load(s) can also be connected between J4 and J6 and/or J7 and J9.

Figure 2. Connection of the Board and Host Computer

5.4 Software Operation

After the installation of the software, an icon with the name TPS65137 EVM appears on the desktop of the

host computer. If it does not, browse the program files in the Start menu for the software. The default

location is Program Files/Texas Instruments/TPS65137 EVM.

After connecting the USB interface adapter to the host computer, the software can be started. Most likely,

at the first startup, the system asks to update the adapter's firmware. After confirmation of this update, the

software window shown in Figure 3 appears.

TPS65137A Evaluation Module SLVU378–August 2010