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Introduction
3
SLVUBB1 – November 2017
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Copyright © 2017, Texas Instruments Incorporated
How to Use the TPS65680 Evaluation Module
ADVANCE INFORMATION
1
Introduction
The TPS65680 EVM uses the TPS65680 device to deliver 18 high-voltage level-shifter output channels to
support the high-voltage gate signals of gate-in-array (GOA) or gate-in-panel (GIP) LCD displays. The
EVM makes it easy to examine the programmability and performance of the TPS65680 device.
1.1
Requirements
The IC on the EVM is not programmed and the outputs will only toggle after a pattern is loaded. The EVM
comes with the USB2ANY interface adapter and the connectors. For programming the device, you
additionally must have a host computer, and a DC power supply. To operate the level shifters, 2 square
wave outputs of a frequency generator or microcontroller are necessary.
1.1.1
Power Supplies
In order to operate this EVM, 3 DC power supplies, PS1, PS2, and PS3, with the following requirements
are needed:
•
PS1 to supply VIN: 2.7 V to 5.5 V capable of 0.5 A
•
PS2 to supply VGL: –18 V to –4 V capable of 1 A
•
PS3 to supply VGH: 9 V to 40 V capable of 1 A
1.1.2
Digital Inputs
The output signals of a gate signal level shifter on an LCD TFT need to be synchronized to the timing
controller that delivers the image content. To keep TPS65680 synchronised to the timing controller
signals, just 2 digital input signals are necessary:
•
LN_CLK is the input signal for the TPS65680 internal PLL. This fixed frequency signal is often set to
the line frequency.
•
A rising edge on LS_START starts the programmed pattern from the programmed start address. This
fixed frequency signal is normally set to the frame frequency, for example; 60 Hz, 120 Hz, 240 Hz, and
so forth.
1.1.3
Host Computer
A computer with a USB port is required program the TPS65680 on the EVM. The TPS65680 software runs
on a personal computer (PC) and communicates with the EVM through a USB port.
The minimum requirements for the PC are:
•
Microsoft Windows 7 or 10 operating system
•
1 USB port
•
A minimum of 280MB of free hard disk space (610MB recommended)
•
A minimum of 512MB of RAM
1.1.4
Software
Texas Instruments provides the software necessary to program the TPS65680 and evaluate the IC
functionality. After you are approved, download the software and install it on your computer.
In addition to ease the first start with the device, TI provides some standard patterns and a How-To-Start
Video. All of these are included in your 'mySecure Software' folder which included this user's guide.
1.2
Applications
•
LCD and OLED panels using GIP and GOA technology
•
TV, monitor, notebook, and tablet PC
