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TLC5946 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza TLC5946
Descripción Electrónicos  16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction
Download  35 Pages
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TLC5946 Datasheet(HTML) 1 Page - Texas Instruments

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1
FEATURES
APPLICATIONS
DESCRIPTION
¼
SIN
XERR
SCLK
XLAT
MODE
GSCLK
SOUT
VCC
GND
TLC5946
IC1
OUT0
OUT15
XHALF
¼
¼
V
LED
V
LED
¼
SIN
SCLK
XLAT
BLANK
R
IREF
IREF
SOUT
TLC5946
ICn
OUT0
OUT15
OUT
XERR
SCLK
XLAT
MODE
BLANK
GSCLK
IN
¼
V
LED
V
LED
R
IREF
IREF
Controller
5
BLANK
GSCLK
MODE
XERR
VCC
GND
XHALF
V
CC
V
CC
V
CC
TLC5946
www.ti.com ......................................................................................................................................................... SLVS824A – MARCH 2008 – REVISED APRIL 2008
16-Channel, 12-Bit PWM LED Driver with
6-Bit Dot Correction
• Monochrome, Multicolor, Full-Color LED
23
• 16 Channels, Constant Current Sink Output
Displays
• 40-mA Capability (Constant Current Sink)
• LED Signboards
• 12-Bit (4096 Steps) Grayscale PWM Control
• Display Backlighting
• 6-Bit (64 Steps) Dot Correction
• LED Power-Supply Voltage up to 17 V
• V
CC = 3.0 V to 5.5 V
The TLC5946 is a 16-channel, constant current sink
• Constant Current Accuracy:
LED driver. Each channel is individually adjustable
with 4096 pulse-width modulated (PWM) steps and
Channel-to-Channel = ±1% (typ)
64 constant current sink steps for dot correction. The
Device-to-Device = ±2% (typ)
dot
correction
adjusts
the
brightness
variations
• 30-MHz Data Transfer Rate
between LEDs. Both grayscale control and dot
correction are accessible via a serial interface. The
• 33-MHz Grayscale PWM Clock
maximum current value of all 16 channels can be set
• Extended Serial Interface
by a single external resistor.
• CMOS Level I/O
The TLC5946 has two error information circuits: one
• Schmitt Buffer Input
for LED open detection (LOD), and a thermal error
• Readable Error Information:
flag (TEF). LOD detects a broken or disconnected
LED
during
display
period.
TEF
indicates
an
Continuous Base LED Open Detection
over-temperature condition.
(LOD)
Thermal Error Flag (TEF)
• Noise Reduction:
4-Channel Grouped Delay
• Operating Temperature: –40°C to +85°C
Typical Application Circuit (Multiple Daisy-Chained TLC5946s)
1
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.
UNLESS
OTHERWISE
NOTED
this
document
contains
Copyright © 2008, Texas Instruments Incorporated
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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