Texas Instruments LP5860TEVM User manual

EVM User's Guide: LP5860TEVM
LP5860T Evaluation Module
Description
The LP5860T Evaluation Module showcases all the
features of the LP5860T LED matrix driver. The
graphical user interface or GUI called LP586x GUI
is used to interface with USB2ANY to the EVM. The
EVM has SPI and I2C inputs through the USB2ANY
interface adapter.
Get Started
1. Order the EVM on ti.com
2. Request the LP5860T data sheet
3. Download the LP586xGUI from ti.com
4. Request the EVM design files
Features
• LP5860T 11 × 18 LED high-current matrix driver
with 8-Bit analog and 8-Bit or 16-Bit PWM dimming
• SPI, I2C, Vsync, IFS, EN signal input from
USB2ANY interface adapter
• LP586x GUI is used to control the EVM
Applications
• Gaming keyboard
• Major and smart home appliance
• Outdoor keypad backlighting
• IR module for video surveillance and IP camera
• Laser diode in optical module
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1 Evaluation Module Overview
1.1 Introduction
This user’s guide describes the characteristics, setup, and usage of the LP5860T evaluation module (EVM). The
LP5860TEVM helps the user evaluate the features of the Texas Instruments LP5860T high-current LED matrix
driver, which integrates 11 scan switches and 18 constant current sinks. This user’s guide includes hardware
setup instructions, graphical user interface (GUI) instructions, printed-circuit board (PCB) layout drawings, a
schematic diagram, and a bill of materials,.
The LP5860TEVM is used to evaluate the characteristics, operation, and usage for LED matrix driver LP5860T.
The LP5860T device is a high performance and small-size device, which integrates 18 constant current sinks
with 11 switching MOSFETs, to drive up to 198 LED dots or 66 RGB LED pixels. Every LED dot is supported
by 8-bit analog dimming and 8-bits or 16-bits configurable PWM dimming methods, which enable smooth and
audible-noise-free dimming control.
This document covers following topics:
•How to set up the LP5860TEVM hardware
•How to use the LP5860T GUI to illuminate LEDs
•Design resources for the LP5860TEVM
The LP5860TEVM can be converted for testing the LP5868T and LP5866T, which are from the same device
family, by removing the factory-installed device (U1) and replacing with the LP5868T or LP5866T counterpart.
When testing the LP5868T or LP5866T device, select the corresponding tag from the menu on the GUI start
page to start evaluation.
1.2 Kit Contents
The LP5860TEVM kit includes the following materials and is illustrated in Figure 1-1.
• LP5860T evaluation module
• USB2ANY interface adapter with ribbon cables and USB cable
Figure 1-1. LP5860TEVM Kit
Full functions for the LP5860T, the performance with RGB LED matrix, and some simple animation effects can
be easily verified through this kit.
1.3 Specification
The evaluation module provides several inputs. The inputs are I2C, SPI, Vsync, EN, IFS signal input and power
supplies for VCC, VLED. External power supply is needed when total current is larger than 400 mA.
1.4 Device Information
The LP5860TEVM showcases the hardware and software capabilities of the LP5860T, a 11 × 18 LED High-
Current Matrix Driver with 8-Bit Analog and 8-Bit or 16-Bit PWM Dimming. This module can be used for
evaluation and for system development utilizing the LP586x GUI application.
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2 Hardware
This following chapters describe how to set up the LP5860TEVM properly. Items from the following list are
required to begin evaluating the LP5860T:
• Computer
• LP5860TEVM
• USB2ANY interface adapter
2.1 Hardware Setup
In the default jumper setting, the board can be evaluated by USB power directly and does not need an external
power supply. Setup connection is demonstrated in Figure 2-1. The setup procedure follows:
1. Connect the USB2ANY with the LP5860TEVM using the 30-pin ribbon cable.
2. Plug the USB cable into the USB port on the computer.
USB2ANY LP5860TEVM
USB Cable
Ribbon Cable
Figure 2-1. Hardware Connection
Figure 2-2 shows the default jumper settings.
Figure 2-2. Default Jumper Setting
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If maximum current is set above 20 mA, an external VLED supply is recommended during evaluation, since the
USB can only provide around 400-mA current. The setup procedure follows:
1. Connect the USB2ANY to the LP5860TEVM using the 30-pin ribbon cable.
2. Connect a 5-V external power supply to the VLED_EXT terminal (see Figure 2-3) and connect the switching
jumper (J1) to another side.
3. Plug the USB cable into the USB port on the computer.
Figure 2-3. Key External Connectors
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3 Software
The following sections describe how to set up the GUI properly. Items from the following list are required to begin
evaluating the LP5860T:
• LP586x GUI software
3.1 Software Setup
Download the LP586x GUI installation package from the LP5860T product folder. Follow the setup wizard to
install the LP586x GUI successfully, see Figure 2-4.
Figure 3-1. GUI Installation
3.2 Graphical User Interface (GUI) Guidance
The LP586x GUI is a convenient tool to control and evaluate all functions of LP586x family. Open the
LP586x.exe file and plug the USB cable into the USB port of the computer. The GUI automatically connects
with the LP5860TEVM. Figure 3-1 illustrate the status bar showing the connection status at the bottom of GUI.
Hardware Connected shows in the status and the indicator in the USB2ANY stops blinking when successfully
connected. Click the connection button to connect or disconnect the LP5860TEVM with the GUI.
Connection button Connection status
Log panel
Figure 3-2. Status Bar
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If the USB2ANY has been used to evaluate other EVMs and updated by other firmware version (like 2.8.2.0),
then the correct firmware version must be updated into USB2ANY. Follow the instructions shown in the GUI
when plugging in the USB cable to update the FW successfully, see Figure 3-2.
Figure 3-3. Firmware Update
If the USB2ANY has not been previously used to evaluate any EVM before, then an unknown version firmware is
detected by GUI. When the update firmware notification shows up, follow these steps. 1) Unplug the USB cable
(do not click the UPDATE button); 2) Press the BSL button inside USB2ANY, then plug in the USB cable; 3) Click
UPDATE button, see Figure 3-3.
Figure 3-4. Firmware Update
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3.2.1 Start Page
Different device variants in the LP586x family are selected from the Start Page. To begin evaluation, because we
only have LP5860 option in the start page, considering LP5860 and LP5860T have same register configuration,
so select the LP5860 tab then click the EXPLORE button to begin evaluation, see Figure 3-3.
Note
The different between LP5860 and LP5860T is that LP5860T has a larger output current than LP5860
at the same MC configuration, so choose the related value when select maximum current. See more
details in Device Configuration section.
Figure 3-5. Start Page
3.2.2 Home Page
Figure 3-4 shows the interface protocol selected in the Home page. Click the Configure & Connect button to
connect the USB2ANY with the LP5860TEVM. The I2C protocol with 0x10 chip address is the default. Other
addresses with 0x11, 0x12, and 0x13 and SPI are also available.
Click the START button below the LED CONTROL block to set current and PWM for every individual LED.
Other configurable functions can also be set through graphical buttons in this page. Predefined animations are
performed with the PATTERN page while every individual register is configured in the REGISTER MAP page.
Figure 3-6. Home Page
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3.2.3 LED Control Page
Set the color and brightness for every RGB LED pixel in the LED control page. To illuminate one LED with
default configuration, use the following procedure and see Figure 3-5.
1. Click the Enable button to enable the LP5860T in the software.
2. Select the LED the user wants to control.
3. Set a color for this LED.
4. Click the Set Brightness button to upload PWM value into the device.
5. Click the VSync button to active this LED (The default is Mode 3 so the SYNC signal is necessary).
①
②
③
⑤
④
Figure 3-7. LED Control Page and Test Procedure
Device Configuration
To improve performance under different applications, configure the key settings first. Select the DEVICE
CONFIGURATION button to show the detail setting slide, which is illustrated in Figure 3-6. Maximum current
(MC) is set here. Please note: if LP5860T is under test, then the Global Maximum Current setting must be:
7.5mA, 12.5mA, 25 mA, 37.5mA, 50 mA, 75 mA, and 100 mA related to first 6 buttons (000 - 110 for bit3 - bit1
in Dev_config3 register) under Global Maximum Current setting. Therefore, if 15 mA is chosen on the Device
Configuration page, then the actual value for LP5860T maximum current is 37.5mA. If a high maximum current
is set, then an external VLED supply is recommended. The Data Refresh Mode settings determine whether a
SYNC signal is required to synchronize the PWM change for every LED dot. The Max Scan Lines controls select
how many scan lines are active. For more information on the functions for other settings, see the LP5860T 11 ×
18 LED Matrix Driver with 8-bit Analog and 8-, 16-bit PWM Dimming Data Sheet.
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When evaluating matrix-issue free performance, de-ghosting and low brightness compensation are configured
here.
Figure 3-8. Device Configuration
Custom LED Setting
Before setting color and brightness for RGB LED, one or multiple LEDs (Shift + select for multiple LED
selections) must first be selected. In the CUSTOM tag, set the color in color selector on the right side, see
Figure 3-7. Brightness is used to adjust the PWM for all 3 dots in one RGB LED. For some high requirement
applications, dot current can adjust white balance for every RGB LED.
Figure 3-9. Custom Setting
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Global and Group Setting
Figure 3-8 illustrates the GLOBAL tab where color current for RGB groups and global PWM for all LED dots are
set. Figure 3-9 illustrates the GROUP tab where every LED dot can be configured to 3 groups arbitrarily, while
the PWM for the same group can be changed synchronously.
Figure 3-10. Global Setting
Figure 3-11. Group Setting
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