Datasheet

ManualsBrandsAdafruit ManualsAdafruitTLC5947 Adafruit 24-Channel 12-bit PWM LED Driver SPI 5V

FEATURES

APPLICATIONS

DESCRIPTION

SIN

SCLK

XLAT

BLANK

SOUT

VCC

GND

TLC5947

IC1

OUT0 OUT23

¼ ¼

DATA

SCLK

XLAT

BLANK

IREF

Controller

¼ ¼

LED

¼ ¼ ¼

SIN

SCLK

XLAT

BLANK

SOUT

VCC

GND

TLC5947

ICn

OUT0 OUT23

IREF

TLC5947

www.ti.com

................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008

24-Channel, 12-Bit PWM LED Driver with

Internal Oscillator

• Noise Reduction:

• 24 Channels, Constant Current Sink Output – 4-channel grouped delay to prevent inrush

current

• 30-mA Capability (Constant Current Sink)

• Operating Temperature: – 40 ° C to +85 ° C

• 12-Bit (4096 Steps) PWM Grayscale Control

• LED Power-Supply Voltage up to 30 V

• V

= 3.0 V to 5.5 V

• Static LED Displays

• Constant Current Accuracy:

• Message Boards

– Channel-to-Channel = ± 2% (typ)

• Amusement Illumination

– Device-to-Device = ± 2% (typ)

• TV Backlighting

• CMOS Logic Level I/O

• 30-MHz Data Transfer Rate (Standalone)

• 15-MHz Data Transfer Rate (Cascaded Devices,

The TLC5947 is a 24-channel, constant current sink

SCLK Duty = 50%) LED driver. Each channel is individually adjustable

with 4096 pulse-width modulated (PWM) steps. PWM

• Shift Out Data Changes With Falling Edge to

control is repeated automatically with the

Avoid Data Shift Errors

programmed grayscale (GS) data. GS data are

• Auto Display Repeat

written via a serial interface port. The current value of

all 24 channels is set by a single external resistor.

• 4-MHz Internal Oscillator

• Thermal Shutdown (TSD):

The TLC5947 has a thermal shutdown (TSD) function

that turns off all output drivers during an

– Automatic shutdown at over temperature

over-temperature condition. All of the output drivers

conditions

automatically restart when the temperature returns to

– Restart under normal temperature

normal conditions.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2 PowerPAD is a trademark of Texas Instruments, Inc.

3 All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (29 pages)

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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 24-Channel, 12-Bit PWM LED Driver with Internal Oscillator • FEATURES 1 • • • • • • 23 • • • • • • • 24 Channels, Constant Current Sink Output 30-mA Capability (Constant Current Sink) 12-Bit (4096 Steps) PWM Grayscale Control LED Power-Supply Voltage up to 30 V VCC = 3.0 V to 5.
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TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 RECOMMENDED OPERATING CONDITIONS At TA= –40°C to +85°C, unless otherwise noted. TLC5947 PARAMETER TEST CONDITIONS MIN NOM MAX UNIT DC Characteristics: VCC = 3 V to 5.5 V VCC Supply voltage VO Voltage applied to output 3.0 5.5 V 30 VIH High-level input voltage V 0.
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TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com ELECTRICAL CHARACTERISTICS At VCC = 3.0 V to 5.5 V and TA = –40°C to +85°C. Typical values at VCC = 3.3 V and TA = +25°C, unless otherwise noted.
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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 SWITCHING CHARACTERISTICS At VCC = 3.0 V to 5.5 V, TA = –40°C to +85°C, CL = 15 pF, RL = 150 Ω, RIREF = 1.6 kΩ, and VLED = 5.5 V. Typical values at VCC = 3.3 V and TA = +25°C, unless otherwise noted.
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TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.
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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 TERMINAL FUNCTIONS TERMINAL DAP RHB I/O SIN NAME 4 32 I Serial input for grayscale data SCLK 3 31 I Serial data shift clock. Schmitt buffer input. Data present on the SIN pin are shifted into the shift register with the rising edge of the SCLK pin.
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TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com PARAMETER MEASUREMENT INFORMATION PIN EQUIVALENT INPUT AND OUTPUT SCHEMATIC DIAGRAMS VCC VCC INPUT SOUT GND GND Figure 1. SIN, SCLK, XLAT, BLANK Figure 2. SOUT OUTn GND Figure 3. OUT0 Through OUT23 TEST CIRCUITS RL VCC VCC VCC OUTn IREF RIREF VLED SOUT VCC CL GND GND Figure 4.
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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 TIMING DIAGRAMS TWH0, TWL0, TWH1: VCC INPUT (1) 50% GND TWH TWL TSU0, TSU1, TSU2, TH0, TH1: VCC CLOCK INPUT (1) 50% GND TSU TH VCC DATA/CONTROL INPUT (1) 50% GND (1) Input pulse rise and fall time is 1 ns to 3 ns. Figure 7.
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TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.
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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 TYPICAL CHARACTERISTICS At VCC = 3.3 V and TA = +25°C, unless otherwise noted.
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TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com TYPICAL CHARACTERISTICS (continued) At VCC = 3.3 V and TA = +25°C, unless otherwise noted. INTERNAL OSCILLATOR FREQUENCY vs AMBIENT TEMPERATURE CONSTANT CURRENT OUTPUT VOLTAGE WAVEFORM Internal Oscillator Frequency (MHz) 5.0 4.5 4.0 CH1-OUT0 (GSData = 001h) CH1 (2 V/div) VCC = +3.
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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 DETAILED DESCRIPTION SETTING FOR THE CONSTANT SINK CURRENT VALUE The constant current value for all channels is set by an external resistor (RIREF) placed between IREF and GND. The resistor (RIREF) value is calculated by Equation 1.
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TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.
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TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 REGISTER CONFIGURATION The TLC5947 has a grayscale (GS) data shift register and data latch. Both the GS data shift register and latch are 288 bits long and are used to set the PWM timing for the constant current driver. Table 2 shows the on duty cycle for each GS data.
PAGE 16
TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com GS data are transferred from the shift register to the latch by the rising edge of XLAT. When powered up, the data in the grayscale shift register and data latch are not set to default values. Therefore, grayscale data must be written to the GS latch before turning on the constant current output.
PAGE 17
TLC5947 www.ti.com ................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 AUTO DISPLAY REPEAT FUNCTION This function can repeat the total display period without any timing control signal, as shown in Figure 21.
PAGE 18
TLC5947 SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................. www.ti.com NOISE REDUCTION Large surge currents may flow through the IC and the board on which the device is mounted if all 24 LED channels turn on simultaneously at the start of each grayscale cycle.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 23-Feb-2012 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
PAGE 21
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TLC5947DAPR HTSSOP DAP 32 2000 330.0 24.4 8.6 11.5 1.6 12.0 24.0 Q1 TLC5947RHBR QFN RHB 32 3000 330.0 TLC5947RHBT QFN RHB 32 250 180.0 12.4 5.3 5.3 1.5 8.0 12.0 Q2 12.4 5.3 5.3 1.5 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLC5947DAPR HTSSOP DAP 32 2000 367.0 367.0 45.0 TLC5947RHBR QFN RHB 32 3000 367.0 367.0 35.0 TLC5947RHBT QFN RHB 32 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.