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Texas Instruments
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TPS62350EVM-201
User Manual
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Texas Instruments TPS62350EVM-201 User Manual

User's Guide
SLVU177A–July 2006–Revised January 2018
TPS62350EVM-201 Evaluation Module
Contents
1 Introduction ................................................................................................................... 2
2 Setup .......................................................................................................................... 2
3 Operation ..................................................................................................................... 5
4 Test Results .................................................................................................................. 7
5 Board Layout ................................................................................................................. 9
6 Schematic and Bill of Materials........................................................................................... 12
List of Figures
1 Output Controls Tab ....................................................................................................... 5
2 Preferences Tab ............................................................................................................ 6
3 Start-up From Enable ....................................................................................................... 7
4 Output Ripple................................................................................................................. 7
5 Load Transient, 1-mA to 180-mA Step ................................................................................... 8
6 Load Transient, 210-mA to 1-mA Step ................................................................................... 8
7 Assembly Layer.............................................................................................................. 9
8 Top Layer Routing ......................................................................................................... 10
9 Bottom Layer Routing ..................................................................................................... 10
10 Layer 2 Routing............................................................................................................. 11
11 Layer 3 Routing............................................................................................................. 11
12 TPS62350EVM-201 Schematic .......................................................................................... 12
1 HPA201A Bill of Materials................................................................................................. 13
Trademarks
Microsoft, Windows are registered trademarks of Microsoft Corporation. VeriSign is a trademark of VeriSign, Inc.. All other trademarks are the property of their respective owners.
SLVU177A–July 2006–Revised January 2018
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List of Tables
Copyright © 2006–2018, Texas Instruments Incorporated
TPS62350EVM-201 Evaluation Module
1
Introduction

1 Introduction

1.1 Requirements

To operate this EVM properly, connect and properly configure the following components:
A personal computer (PC) with a USB port is required to operate this EVM. The TPS62350 interface software runs on the PC and communicates with the EVM via the PC’s USB port. Commands can be sent to the internal registers of the TPS62350 through the USB port.
Personal Computer Requirements
• Microsoft®Windows®2000 or Windows XP operating system
• USB port
• Minimum of 30 MB of free hard disk space (100 MB recommended)
• Minimum of 256 MB of RAM Printed-Circuit Board Assembly
The TPS62350EVM-201 PCB contains the TPS62350 IC and its required external components. This board contains several jumpers and connectors that enable the user to customize the board for specific operating conditions.
USB Interface Adapter
The USB interface adapter is the link that allows the PC and the EVM to communicate. One end of the USB interface adapter connects to the PC with the supplied USB cable; the other side of the USB interface adapter connects to the EVM with the supplied ribbon cable.
When a command is written to the EVM, the interface program running on the PC sends the commands to the PC USB port. The USB interface adapter receives the USB command, converts the signal to an I2C protocol, and sends the I2C signal to the TPS62350 EVM board
Software
Texas Instruments provides software to assist in evaluating this EVM. The software can be installed from the supplied CD or downloaded from the Texas Instruments Web site at www.ti.com.
www.ti.com

2 Setup

This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up, and use the TPS62350EVM-201.

2.1 Input/Output Connector Descriptions

2.1.1 J1 – VIN
This is the positive input supply voltage to the converter. The leads to the input supply should be twisted and kept as short as possible to minimize EMI transmission.
2.1.2 J2 – GND
This is the return connection for the input power supply of the converter.
2.1.3 J3 – I2C Input
This connector is the I2C input for the converter.
2.1.4 J4 – SYNC INPUT
This connector is used to synchronize the switching of the TPS62350 to an external clock source. Pin 1 of J4 connects to the SYNC pin of the TPS62350. Pin 2 of J4 is connected to the ground of the TPS62350. The SYNC input has a 1-MΩ pulldown resistor installed on the EVM board.
2
TPS62350EVM-201 Evaluation Module
Copyright © 2006–2018, Texas Instruments Incorporated
SLVU177A–July 2006–Revised January 2018
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www.ti.com
2.1.5 J5 – VOUT
This is the positive connection from the output of the converter. Connect this pin to the positive input of the load.
2.1.6 J6 – GND
This is the return connection for the output of the converter.
2.1.7 JP1 – SDA Converter 1
This jumper is used to tie the I2C SDA pin of the TPS62350 to either a 10-kΩ pullup resistor to the input voltage or to short the SDA pin to ground. The shunt can be removed if the I2C master has its own pullup or operates from a voltage that is different than the input voltage of the TPS62350. The Texas Instruments USB interface adapter provides an active pullup; therefore, do not install a jumper when using the adapter supplied with the EVM.
2.1.8 JP2 – SCL Converter 1
This jumper is used to tie the I2C SCL pin of the TPS62350 to either a 10-kΩ pullup resistor to the input voltage or to short SCL to ground. The shunt can be removed if the I2C master has its own pullup or operates from a voltage that is different than the input voltage of the TPS62350. The Texas Instruments USB interface adapter provides an active pullup; therefore, do not install a jumper when using the adapter supplied with the EVM.
2.1.9 JP4 – ENABLE Converter 1
This jumper enables or disables the converter. Connect the shorting jumper from the center ENABLE pin to either the ON or OFF position. Never leave this pin floating.
Setup
2.1.10 JP3 – VSEL Converter 2
This jumper is used to select the output voltage of the converter. Placing a shunt between pins 1 and 2 (HIGH and VSEL) sets the output voltage of the converter to the voltage defined by the internal VSEL1 register. Placing a shunt between pins 2 and 3 (VSEL and LOW) sets the output voltage of the converter to the voltage defined by the internal VSEL0 register.

2.2 Software Setup

If installing from a CD, insert the CD and run Setup.exe; follow all the prompts to install the software. If installing from the TI Web site, go to the URL, www.ti.com
NOTE: This installation page is best viewed with Microsoft Internet Explorer browser (It may not
work correctly with other browsers)
Click on the install button; your PC should give you a security warning and ask if you want to install this application. Select Install to proceed.
With both types of installation, the software attempts to install the Microsoft Dot Net Framework 2.0 (if it is not already installed) This framework is required for the software to run.
After installation, the software should automatically run. During future use of the software, it may prompt you to install a new version if one becomes available on
the Web.
NOTE: VeriSign™ Code Signing is used to prevent any malicious code from changing this
application. If at any time in the future the binaries are modified, the code will no longer attempt to run.
SLVU177A–July 2006–Revised January 2018
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Copyright © 2006–2018, Texas Instruments Incorporated
TPS62350EVM-201 Evaluation Module
3
Host
Computer
USBCable
USB
Interface
Adapter
GreenLED
Indicates
Power
10-Pin
Ribbon
Cable
EVMBoard
USBInterface AdaptorQuickConnectionDiagram
Setup

2.3 Hardware Setup

Configure JP1, JP2, JP3, and JP4 using a shorting block. These jumpers are used to connect the SDA and SCL lines of the I2C interface to a pullup resistor to the input voltage. The USB interface adapter supplied with the EVM has its own internal pullup resistors; therefore, no additional pullup is required. No jumper is necessary if the Texas Instruments USB interface adapter is used to communicate with the TPS62350EVM board, and JP1 and JP2 should be left open.
Configure the jumper on JP3 to the desired setting. Shorting between VSEL and HIGH (pins 1 and 2) makes the TPS62350 power up with the output voltage set by the VSEL1 register. Shorting between VSEL and LOW (pins 2 and 3) makes the TPS62350 power up with the output voltage set by the VSEL0 register.
Configure JP4 as desired. Shorting between EN and ON (pins 1 and 2) enables the TPS62350. Shorting between EN and OFF (pins 2 and 3) disables the TPS62350.
Connect the USB interface adapter to your PC using the supplied USB cable. Connect the TPS62350EVM board to the USB interface adapter using the supplied 10-pin ribbon cable. The connectors on the ribbon cable are keyed to prevent incorrect installation.
www.ti.com
Connect an input voltage supply to the TPS62350EVM board. The TPS62350 uses an input voltage between 2.7 V and 6 V. Connect the positive input voltage to J1. Connect the input voltage return (ground) connection to J2.
4
TPS62350EVM-201 Evaluation Module
Copyright © 2006–2018, Texas Instruments Incorporated
SLVU177A–July 2006–Revised January 2018
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ControlPanel Tabs “Output
Controls” selected
OutputVoltageSelection PulldownBoxes
TPS62350 InternalRegister Values. Canbe
alteredbitby bitifdesired. Updates register
when “Write” buttonis pushed.
www.ti.com

3 Operation

This section provides descriptions of the EVM software. The supplied software is used to communicate with the TPS62350EVM. Click on the icon on the host
computer to start the software. The software asks which version of the IC is on the board. Check the TPS62350 box, and click the continue box. The software displays the main control panel for the user interface. When initialized, the host computer software automatically searches on the Internet (if connected) for updates. If a new update is available, the software notifies the user of the update and downloads it.
The main control panel for the user interface has three main page tabs, EVM Configuration, Output Controls, and Preferences. The software initializes with the EVM Configuration tab selected. This page can be used to set register values that correspond to the hardware configuration of the EVM. The EVM can be operated with the default values.
Figure 1 shows the user interface with the Output Control tab selected. This page is used to change the
output voltage of the TPS62350 via the register settings. The page has two pulldown boxes, one for VSEL0 and one for VSEL1, with the available output voltage. The voltages listed in the boxes assume PWM mode of operation, so the actual output voltage of the EVM varies from the listed values at light loads.
Operation
Figure 1. Output Controls Tab
SLVU177A–July 2006–Revised January 2018
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TPS62350EVM-201 Evaluation Module
5
CrossLinkenableanddeltaselection
Operation
Figure 2 shows the page of the Preferences tab. The Preferences page is used to change the look of the
user interface such as the text color or the color of the boxes used to display a logic 1 or 0 in the register displays. The Preferences page also provides an option for cross-linking the values in the VSEL0 and VSEL1 registers within a selectable percentage. The default is no cross-linking. If cross-linking is enabled, then the difference between VSEL0 and VSEL1 cannot exceed the selected percentage. This feature provides a method to limit the ratio of voltages that can be selected. This can be used to avoid inadvertently selecting output voltages, in the output voltage pull-down boxes, that are too high for the application being tested.
www.ti.com
All three tabs show the bit representation of all four internal registers of the TPS62350. These bits can be individually altered by clicking on them. Clicking on a bit does not immediately change the register value of the IC. The Write button must be pushed to update the register with the newly selected bit values. Each register display has its own Write button that only updates the register that is displayed next to it. The Write To All Registers button updates all four registers with one push.
6
TPS62350EVM-201 Evaluation Module
Figure 2. Preferences Tab
Copyright © 2006–2018, Texas Instruments Incorporated
SLVU177A–July 2006–Revised January 2018
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