Texas Instruments TLC6C5712-Q1 Manuale utente

User's Guide

SLVUAE6A–January 2015–Revised July 2015

TLC6C5712-Q1 Evaluation Module

1 Introduction

This document is the user's guide for the TLC6C5712-Q1 evaluation module (EVM) as a supplement to

the TLC6C5712-Q1 data sheet. This user’s guide describes the characteristics, operation, and use of the

TLC6C5712-Q1 EVM. This EVM is designed to help the user evaluate and test the various operating

modes of the TLC6C5712-Q1 device. This user’s guide includes a detailed description of the graphical

user interface (GUI) which can help customers easily use the GUI. The guide also contains the setup

instructions for the hardware and software, a schematic diagram, a bill of materials (BOM), and PCB

layout drawings for the evaluation module.

The TLC6C5712-Q1 device is a 12 channel, constant-current LED driver that is capable of driving up to 75

mA per channel. The device contains an integrated DOT-correction circuitry which can adjust the DC

current for each output channel to compensate for a difference in brightness among the LEDs. The device

also has integrated PWM mapping control to provide individual LED PWM dimming. The device has full

LED diagnostics, such as LED open, LED short, output short to GND, over-temperature prewarning, over-

temperature thermal shutdown, reference short and open, adjacent pin short, and others. This EVM can

be used to evaluate a single device, but it can be also configured to drive two devices in a cascade

configuration. By using the GUI, users can easily evaluate the device.

Figure 1. Top View of the TLC6C5712-Q1EVM PCB

SLVUAE6A–January 2015–Revised July 2015 TLC6C5712-Q1 Evaluation Module

USB2ANY

DC Supply

5 V

VSENSE

VCC

GND

USB

cable

Ribbon Cable

Put Shunt on J3 to

supply VCC from

USB2ANY

TLC6C5712-Q1EVM

Requirements

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2 Requirements

To operate this EVM, the software, power supply, and communication board must be connected and

properly configured. This section provides more information on each component.

2.1 Software

Texas Instruments has provided the necessary software to evaluate this EVM. For the latest software

revision, go to the TLC6C5712-Q1 product folder, www.ti.com/product/TLC6C5712-Q1,.

2.2 Power Supply Requirements

The EVM board can receive supply in one of two ways. The first way is suitable for evaluation in the lab

which uses two DC power supplies. The first DC power supply is for VCC and the other is for VSENSE.

The second way is suitable for portable demonstration. In this case, only a 5-V micro-USB supply is

required. The VSENSE pin can be powered through a USB cable directly and the VCC pin can be directly

supplied by the USB2ANY.

2.3 Communication Board

The USB2ANY is the interface between the PC and the TLC6C5712-Q1EVM. One end of the USB2ANY

connects to the PC with the USB cable and the other end of the USB2ANY connects to the EVM with the

ribbon cable. After installing the GUI, users can control the TLC6C5712-Q1EVM by sending commands

through the USB2ANY.

3 Setup

The following sections describe how to setup the EVM hardware and software.

3.1 Hardware Setup

Figure 2 shows the hardware setup of the TLC6C5712-Q1EVM.

Step 1. Connect the 5-V power supply to the LED board between TP1 (VSENSE) and TP3 (GND).

Users can also use the 5-V micro-USB supply connected to J2 to supply VSENSE.

Step 2. Put a shunt on J3 to connect the USB2ANY 3.3-V supply to VCC. In this case, the user is not

required to supply VCC with another DC supply.

Step 3. Connect the host computer to USB2ANY board using the USB cable.

Step 4. Connect the ribbon cable between the USB2ANY board and the TLC6C5712-Q1 EVM board.

Figure 2. Hardware Setup for TLC6C5712-Q1EVM

2TLC6C5712-Q1 Evaluation Module SLVUAE6A–January 2015–Revised July 2015

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Setup

3.2 Software Installation

Download the GUI software from www.ti.com. After downloading, install the TLC6C5712-Q1 EVM GUI on

the PC. A shortcut to the GUI is found on the desktop. A shortcut can also be found in the startup menu

under the Texas Instruments folder.

3.3 GUI Connection

After setting up the hardware, open the GUI. Figure 3 shows the overview of the TLC6C5712-Q1 EVM

GUI. When the EVM is connected correctly, the status bar at the bottom right of the GUI will show a green

CONNECTED status. A red SIMULATION status indicates that the device is not connected. Check the

connection of the device to make sure that it is properly connected. If the SIMULATION status still

appears, then uncheck the Simulate Communication box in the top right of the GUI to connect the device.

Figure 3. TLC6C5712-Q1 EVM GUI Overview

4 Input and Output Connector Descriptions

4.1 Power Supply Connector

Table 1 list the connector descriptions of the power supply.

Table 1. Power Supply Connectors

CONNECTOR NAME DESCRIPTION

TP1 VSENSE This connector is the positive input of the load supply

The connector is a Micro-USB connector, it can be used to supply the load by an

J2 VSENSE Supply USB cable.

TP2 VCC This connector is the positive input of the IC internal supply.

TP3 GND This connector is the ground of the EVM.

SLVUAE6A–January 2015–Revised July 2015 TLC6C5712-Q1 Evaluation Module

Input and Output Connector Descriptions

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4.2 SPI Interface Connectors

The J1 jumper is the SPI interface connector. Table 2 lists the detailed description of J1.

Table 2. SPI Interface Connector

PIN NO. PIN SYMBOL SIGNAL NAME I/O FUNCTION

1 — — — —

2 — — — —

3 — — — —

4 PWM3 PWM3 Input PWM input for PWM3 of U1

5 PWM2 PWM2 Input PWM input for PWM2 of U1

6 PWM4 PWM4 Input PWM input for PWM4 of U1

7 — — — —

8 PWM5 PWM5 Input PWM input for PWM5 of U1

9 — — — —

10 — — — —

11 PWM0 PWM0 Input PWM input for PWM0 of U1

12 LATCH_IN Serial data latch Input Rising edge latches data from

shift registers into the device

13 SDO_OUT Serial data output Output Serial data output for U1. This is

also the serial data input in

cascade mode.

14 SDI_IN Serial data input Input Serial data input for U1

15 3.3 V 3.3-V supply Power 3.3-V supply on USB2ANY

16 GND Ground Power Signal ground

17 PWM1 PWM1 Input PWM input for PWM1 of U1

18 SCLK_IN Serial data clock Input Serial data input clock

19 — — — —

20 ERR Error output Output Error output for device

21 — — — —

22 — — — —

23 — — — —

24 — — — —

25 — — — —

26 — — — —

27 — — — —

28 — — — —

29 — — — —

30 — — — —

4TLC6C5712-Q1 Evaluation Module SLVUAE6A–January 2015–Revised July 2015

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Input and Output Connector Descriptions

4.3 Test Points

Table 3 the test points of the EVM.

Table 3. Test points of the EVM

SYMBOL NAME FUNCTION

TP15 SCLK_IN SPI clock input of U1

TP13 SDI_IN SPI data input of U1

TP12 LATCH_IN SPI latch input of U1

TP14 SDO SPI data output of U1

TP29 ERR ERR output of U1

TP16 OUT0 OUT0 of U1

TP17 OUT1 OUT0 of U1

TP18 OUT2 OUT0 of U1

TP19 OUT3 OUT0 of U1

TP20 OUT4 OUT0 of U1

TP21 OUT5 OUT0 of U1

TP5 PWM0 PWM0 of U1

TP6 PWM1 PWM0 of U1

TP7 PWM2 PWM0 of U1

TP4 VCC VCC of U1

TP11 IREF Iref of U1

TP30 GND GND

TP28 VSENSE VSENSE of U1

TP27 OUT11 OUT0 of U1

TP26 OUT10 OUT0 of U1

TP25 OUT9 OUT0 of U1

TP24 OUT8 OUT0 of U1

TP23 OUT7 OUT0 of U1

TP22 OUT6 OUT0 of U1

TP10 PWM5 PWM0 of U1

TP9 PWM4 PWM0 of U1

TP8 PWM3 PWM0 of U1

J21, J22, J23, J24, J25, J26, J27, J28, VSENSE VSENSE of U1

J29, J30, J31, J32

J34, J35, J36, J37, J38, J39, J40, J41, GND GND

J42, J43, J44, J45

SLVUAE6A–January 2015–Revised July 2015 TLC6C5712-Q1 Evaluation Module

Input and Output Connector Descriptions

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4.4 Jumpers

Table 4 lists shows the jumpers of the EVM.

Table 4. Jumpers of the EVM

JUMPER DESCRIPTION

J3 Connect 3.3 V to VCC

J17 Connect REF resister and GND

J16 Connect SDO to SDO_OUT, when controlling a single TLC6C5712-Q1 device, put a shunt on this jumper

J18 Cascade U1 with U2, when controlling U1 and U2 in series, remove shunt on J16, put shunt on J18 and J19

J19 Cascade U1 with U2, when controlling U1 and U2 in series, remove shunt on J16, put shunt on J18 and J19

J20 OUT0-5 of U2

J33 OUT6-11 of U2

J4 Connect D1 to OUT0 of U1

J5 Connect D2 to OUT1 of U1

J6 Connect D3 to OUT2 of U1

J7 Connect D4 to OUT3 of U1

J8 Connect D5 to OUT4 of U1

J9 Connect D6 to OUT5 of U1

J10 Connect D7 to OUT6 of U1

J11 Connect D8 to OUT7 of U1

J12 Connect D9 to OUT8 of U1

J13 Connect D10 to OUT9 of U1

J14 Connect D11 to OU10 of U1

J15 Connect D12 to OUT11 of U1

6TLC6C5712-Q1 Evaluation Module SLVUAE6A–January 2015–Revised July 2015

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GUI Function

5 GUI Function

This section describes the details of the TLC6C5712-Q1 EVM GUI. The GUI has two configuration levels:

one is a high-level configuration, the other is a low-level configuration. In the high-level configuration, two

tabs are included which are for the general function and advanced function. Low-level configuration

describes all the TLC6C5712-Q1 registers. The following sections introduce the details of the functions.

5.1 General

Figure 4 shows the general tab of TLC6C5712-Q1 EVM GUI. In this page, users can easily change the

Figure 4. TLC6C5712-Q1 EVM GUI

The general tab is divided into four parts. Figure 5 shows the register control of CH ON MASK, PWM MAP

MASK, SHORT GND MASK, LED SHORT MASK, OPEN FAULT MASK, and DOT CORRECTION

SETTING.

The LEDs can be turned on by clicking the CH ON MASK button. The word on the button shows the value

sent to the register. When the button displays OFF, the value of the CH ON MASK is 1 which means the

LED is masked and the output is turned off. When the button displays ON, the value of the CH ON MASK

is 0 which means the LED is not masked and the output is turned on.

The PWM MAP MASK is used to map the PWM control for each channel. When driving the EVM using the

USB2ANY board, only three PWM outputs available: PWM0, PWM1, and PWM2. These outputs can be

controlled by the sliders in Figure 6. The PWM3, PWM4 and PWM5 are connected to the GND of

USB2ANY.

The SHORT GND MASK, LED SHORT MASK, and OPEN FAULT MASK are used to control the fault

mask. A setting of 1 indicates that the fault is masked. A setting of 0 indicates that the fault is not masked.

When the fault is unmasked, the fault will be reported to the open and short registers in the status register.

SHORT GND MASK and LED SHORT MASK correspond with the status of the short register shown in

Figure 7. OPEN FAULT MASK corresponds with the status of the open register shown in Figure 7.

SLVUAE6A–January 2015–Revised July 2015 TLC6C5712-Q1 Evaluation Module

REF OUT

OUT REF

V K DC 1

IR 256

u

GUI Function

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The DOT CORRECTION SETTING is used for setting the output current for each channel. Each channel

has an internal 8-bit linear current DAC for individual dot correction control. Use Equation 1 to set the

output current.

where

• VREF is the reference voltage, 1.229 V

• KOUT is the output current to IREF current ratio, 500

• RREF is the reference resistor

• DC is the DOT correction setting value (1)

Figure 5. General Function I

PWM FAULT MASK is used to control the PWM fault mask. A setting of 1 indicates that the PWM fault is

masked and therefore the fault will not be reported to the status register shown in Figure 7. A setting of 0

indicates that the PWM fault is unmasked and therefore when a PWM fault occurs, the fault will be

reported to PWM status register.

The ERR MASK field is used to control the ERROR mask. A setting of 1 indicates that the error is masked

and therefore the error is not reported to the ERROR indicator shown in Figure 8. A setting of 0 indicates

that the error is unmasked and therefore, when an error occurs, the error is reported to the ERROR

indicator. When users need the error indicator to report the fault, the fault mask for each channel (such as

PWM fault mask, SHORT GND MASK, and so on) should not be masked. When D13 on the EVM is on,

users can click the READ ALL to get the fault.

The MISC_CMD field contains fives commands. The D_OFD command disables the off state diagnostic. If

the LED off-state diagnostic is not needed, change the register value to 1. The ADJ_SH command detects

the adjacent pin short fault. Users can implement the detection by setting the register value to 1. Because

the register value resets to 0 after the device finishes the detection, users must change the ADJ_SH value

back to 0 after the detection is complete. The S_SR command is used to control the output slew rate. A

setting of 1 indicates the slow slew rate. The F_ERR command forces the ERROR output state. When the

the weak-load supply-detection threshold. A setting of 1 indicates that the detection threshold is 2.77 V. A

setting of 0 indicates that the detection threshold is 4.2 V.

8TLC6C5712-Q1 Evaluation Module SLVUAE6A–January 2015–Revised July 2015

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GUI Function

The PWM0, PWM1, and PWM2 fields generate the PWM control signals for the TLC6C5712-Q1 EVM.

PWM0, PWM1, and PWM2 corresponds with the PWM0, PWM1, and PWM2 inputs of the TLC6C5712-Q1

device. Users can select from the following 8 frequencies: 100 Hz, 200 Hz, 500 Hz, 1 KHz, 2 KHz, 5 KHz,

10 KHz, 20 KHz, 50 KHz, and 100 KHz. The duty cycles can also be changed from 0 to 100%

respectively.

Figure 6. General Function II

Figure 7 shows the status registers and fault registers of the TLC6C5712-Q1 device. By clicking the Read

All button, the information of these registers is read out. A red indicator color indicates a fault.

Figure 7. General Function III

Figure 8 contains registers with simple read and write functions. Users can write and read registers by

input address and data value. The ERROR indicator shows the ERR pin state. If the error pin is pulled

low, the ERROR indicator displays red. The left side of Figure 8 shows several special commands of

TLC6C5712-Q1 device which can be found in the datasheet (SLVSCO9).

SLVUAE6A–January 2015–Revised July 2015 TLC6C5712-Q1 Evaluation Module

GUI Function

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Figure 8. General Function IV

5.2 Advanced Commands

Figure 9 shows the advanced command functions. Users can write command sequences in the Codes to

Send field. Users must follow the specific format when inputting the commands. The standard format for

comments is // comments which is optional. The GUI identifies the // symbol and ignores the content

following this symbol. The text following the symbol can be in either uppercase or lowercase. The delay

function is only used for general delay as the delay time does not contain the software operate delay.

Address Data // comments

0x61 0x69 // power on reset

0x62 0x66

PWM(1,2,50) //PWM(Channel,Index,DutyCycle)

Delay 100 // Delay N, delay N ms

0x52 0x00 //Turn on CH0-CH5

0x53 0x00 //Turn on CH6-CH11

0x46 0xff //CH0 Dot Correction value = 255

.........

For the PWM command, the channel value should range from 0 to 2. A value of 0 corresponds with

PWM0, a value of 1 corresponds with PWM1, and a value of 2 corresponds with PWM2. The index value

should range from 0 to 9. This value corresponds with a frequency from 100 Hz to 100 kHz. Table 5 lists

the relationship between the channel and PWM control. Table 6 lists the relationship between the index

value and frequency.

Table 5. Channel and PWM Control

CHANNEL 012

PWM CONTROL PWM0 PWM1 PWM2

Table 6. Index and Frequency

INDEX 0 1 2 3 4 5 6 7 8 9

FREQUENCY 100 Hz 200 Hz 500 Hz 1 kHz 2 kHz 5 kHz 10 kHz 20 kHz 50 kHz 100 kHz

10 TLC6C5712-Q1 Evaluation Module SLVUAE6A–January 2015–Revised July 2015

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