Texas Instruments TPS61177AEVM User manual

TPS61177AEVM User Guide

User's Guide

Literature Number: SNVU490

OCTOBER 2015

Contents

1 Introduction......................................................................................................................... 4

2 Set-Up ................................................................................................................................ 4

2.1 Input/Output Connector Description ................................................................................... 4

2.2 TPS61177AEVM Set-Up................................................................................................ 6

2.2.1 Installation Guide for GUI Program (Windows7-Compatible)........................................... 6

2.3 Instructions fo Stand-Alone Evaluation .............................................................................. 18

2.4 Instructions for Evaluation With Software ........................................................................... 19

3 TPS61177AEVM Component Placement ................................................................................ 20

4 Schematic ......................................................................................................................... 22

5 TPS61177AEVM Bill of Materials .......................................................................................... 23

6 TPS61177A Usage and Programming.................................................................................... 24

6.1 In-Circuit Operation..................................................................................................... 24

6.2 ENABLE.................................................................................................................. 24

6.3 Boost Converter Configuration........................................................................................ 24

6.3.1 Setting the Boost Switching Frequency.................................................................. 24

6.3.2 Setting the Boost Voltage.................................................................................. 24

6.3.3 Setting the Boost Switch Slew Rate...................................................................... 24

6.4 LED Driver Configuration.............................................................................................. 24

6.4.1 Setting the Maximum LED Current ....................................................................... 24

6.4.2 PWM Output Frequency ................................................................................... 24

6.4.3 Dimming Mode Settings.................................................................................... 25

6.5 Support for Fault Conditions .......................................................................................... 25

6.5.1 Thermal Shutdown.......................................................................................... 25

6.5.2 Undervoltage Lockout ..................................................................................... 25

6.5.3 Undervoltage Lockout ..................................................................................... 25

6.5.4 Overvoltage Protection..................................................................................... 25

6.5.5 Undervoltage Lockout ..................................................................................... 25

6.6 ID Register............................................................................................................... 25

6.7 EEPROM Default Values.............................................................................................. 25

6.8 Instructions for Programming EEPROM............................................................................. 26

7 Related Documentation From Texas Instruments................................................................... 26

2Table of Contents SNVU490–OCTOBER 2015

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List of Figures

1 TPS61177AEVM Evaluation Board ....................................................................................... 4

2 TPS61177AEVM With USB2Any Board Connected .................................................................... 6

3 TPS61177A GUI - First Page............................................................................................. 14

4 Option to Select Register Control ........................................................................................ 15

5 TPS61177A GUI - Register Control Page .............................................................................. 16

6 Default Jumper Configuration............................................................................................. 18

7 TPS61177A EVM Test Setup for Standalone Evaluation............................................................. 19

8 TPS61177A EVM Test Setup With USB2ANY Connected for Software Control .................................. 20

9 TPS61177AEVM Component Placement (Layout) .................................................................... 21

10 TPS61177AEVM Schematic.............................................................................................. 22

List of Tables

1 Device and Package Configurations ...................................................................................... 4

SNVU490–OCTOBER 2015 List of Figures

Introduction

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1 Introduction

The Texas Instruments TPS61177AEVM evaluation module (EVM) helps designers evaluate the operation

and performance of the TPS61177A High-Efficiency LED Backlight Driver. The device offers configurability

and can be set up to switch at 450 kHz, 600 kHz, 800 kHz, and 1.2 MHz.

The EVM contains one LED driver (see Table 1).

Table 1. Device and Package Configurations

LED DRIVER IC PACKAGE

U1 TPS61177A VQFN

Figure 1. TPS61177AEVM Evaluation Board

2 Set-Up

This section describes the jumpers and connectors on the EVM, as well as how to properly connect, set

up, and use the TPS61177AEVM.

2.1 Input/Output Connector Description

J1 - Input: This header is the power input(VIN) terminal for the boost converter. The terminal provides a

power (VBAT) connection to allow the user to attach the EVM to a power supply.

J2 - Input: This header is the power input (GND) terminal for the boost converter. The terminal provides a

power ground(PGND) connection to allow the user to attach the EVM to a power supply.

J3 - Input: T his header is the power input terminal for the boost converter. The terminal provides a power

and power ground connection to allow the user to attach the EVM to a power supply using a 2-pin IDC

socket and also monitor VIN connected to J1.

J4 - Connector: This connector is for interfacing LED load board via ribbon cable or flying wires.

J5 - GND: This header connects to AGND to provide grounds for signal probing.

J6 - GND: This header connects to AGND to provide grounds for signal probing.

J7 - Input: This header connects to AGND to provide grounds for signal probing.

J8 - Connector: This connector is for interfacing with USB2ANY interface board for I2C communication

and control inputs such as PWM and EN signal.

4List of Tables SNVU490–OCTOBER 2015

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Set-Up

J9 - GND: This header connects to AGND to provide grounds for signal probing.

J10 - Connector: This connector is for interfacing LED load board(WLEDEVM-260) via 2 row ribbon

cable.

J17 - Connector: This connector is to use PWM signal from USB2ANY instead of VIN or external one

chosen by JP9.

J18 - Connector: This connector is to use EN signal from USB2ANY instead of VIN or external one

chosen by JP1.

JP1 - Jumper: This jumper is for selecting EN input state between high and low.

JP2 - Jumper: This jumper is for connecting VOUT to J4 and J10 for LED load connection.

JP3 to JP8 - Jumpers: These jumpers are for enabling or disabling LED channels.

JP9 - Jumper: This jumper is used to set PWM control. Connecting pin 1 and pin 2 will send high signal

to device and set full on. Connecting pin2 and pin3 will send low signal to device and set off.

JP10 - Jumper: This jumper is a small pad to place jumper resistor or current sensing resistor on VIN.

JP11 to JP16 - Jumpers: TThese jumpers are used to bypass 10-Ωseries resistors to measure LED

string current.

JP17 - Jumper: This jumper is used to bypass series resistor on boost feedback (VLED) input.

JP18 - Jumper: This jumper is used to connect VIN to boost circuit or to bypass JP10.

TP1 - Test Point: This header is test point for VIN.

TP2 - Test Point: This header is test point for VINB.

TP3 - Test Point: This header is test point for VCC out.

TP4 - Test Point: This header is test point for boost switch node voltage.

TP5 - Test Point: This header is test point for REF.

TP6 - Test Point: This header is test point for VLED (boost feedback).

TP7 - Test Point: This header is test point for boost output voltage.

TP8 - Test Point: This header is test point for EN.

TP9 - Test Point: This header is test point for PWM input.

TP10 - Test Point: This header is test point for SCL (I2C clock).

TP11 - Test Point: This header is test point for SDA(I2C data).

TP12 - Test Point: This header is test point for CS1(LED driver out for channel 1).

TP13 - Test Point: This header is test point for CS6(LED driver out for channel 6).

SNVU490–OCTOBER 2015 List of Tables

Set-Up

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2.2 TPS61177AEVM Set-Up

Figure 2. TPS61177AEVM With USB2Any Board Connected

External power must be provided to the board. A standard USB to mini USB cable must be connected to

the USB2ANY from a PC. The I2C-compatible interface program provides all of the controls that the

TPS61177A device requires.

For proper operation:

• - USB2ANY should be plugged into the PC before the interface program is opened.

• - Install and execute the GUI program – installation guide will be followed below.

• - Power the evaluation board

2.2.1 Installation Guide for GUI Program (Windows7-Compatible)

• Execute setup_TPS61177A_EVM.exe file : If it is compressed in zip file format, unzip first in any

location.

• Select “Run” though Windows security warning message appears

6List of Tables SNVU490–OCTOBER 2015

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Set-Up

• Click "Next" button.

• Check to accept the agreement and click “Next” button to proceed with installation.

SNVU490–OCTOBER 2015 List of Tables

Set-Up

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• Click “Next” button. In default, program will be installed in C:\Program Files (x86)\Texas

Instruments\TPS61177A folder and Texas Instruments\TPS61177AEVM in start menu.

• Check to create a desktop icon for the program and click “Next” button.

8List of Tables SNVU490–OCTOBER 2015

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Set-Up

• Click “Install” button.

• Click “Finish” button to finish installation and launch the program.

SNVU490–OCTOBER 2015 List of Tables

Set-Up

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• If firmware update of USB2ANY adaptor is needed this window will pop up.

• Depending on firmware versions in USB2ANY adaptors, this firmware uploader will appear, and then

follow the instruction on this window.

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Table of contents

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