Texas Instruments TLC6C5712-Q1 User manual

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
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USB2ANY
DC Supply
5 V
VSENSE
VCC
GND
USB
cable
Ribbon Cable
Put Shunt on J3 to
supply VCC from
USB2ANY
TLC6C5712-Q1EVM
Requirements www.ti.com
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
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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.
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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 — — — —
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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
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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
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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
register values.
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.
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REF OUT
OUT REF
V K DC 1
IR 256
u
u
GUI Function www.ti.com
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
register is 1, the ERR output is pulled low even the system has no error. The WLS command configures
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.
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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).
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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
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