TLC5929
www.ti.com
SBVS159 –APRIL 2011
16-Channel, Constant-Current LED Driver with 7-Bit Global Brightness Control,
Power-Save Mode, and Full Self-Diagnosis for LED Lamp
Check for Samples: TLC5929
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FEATURES
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2-ns Delayed Switching Between Each
Channel Minimizes Inrush Current
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16 Constant-Current Sink Output Channels
with On/Off Control
Operating Temperature: –40°C to +85°C
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Current Capability:
APPLICATIONS
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–
40 mA (VCC ≤ 3.6 V)
50 mA (VCC > 3.6 V)
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Variable Message Signs (VMS)
Illumination
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Global Brightness Control: 7-Bit (128 Steps)
Power-Supply Voltage Range: 3.0 V to 5.5 V
LED Power-Supply Voltage: Up to 10 V
Constant-Current Accuracy:
LED Video Displays
DESCRIPTION
The TLC5929 is a 16-channel constant current sink
LED driver. Each channel can be turned on or off by
writing data to an internal register. The constant
current value of all 16 channels is set by a single
external resistor with 128 steps for the global
brightness control (BC).
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Channel-to-Channel = ±1% (typ)
Device-to-Device = ±2% (typ)
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Data Transfer Rate: 33 MHz
BLANK Pulse Width: 40 ns (min)
LED Open Detection (LOD)/LED Short
Detection (LSD) with Invisible Detection Mode
(IDM)
The TLC5929 has six error flags: LED open detection
(LOD), LED short detection (LSD), output leakage
detection (OLD), reference current terminal short
detection (ISF), pre-thermal warning (PTW) and
thermal error flag (TEF). In addition, the LOD and
LSD functions have invisible detection mode (IDM)
that can detect those errors even when the output is
off. The error detection results can be read via a
serial interface port.
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Output Leakage Detection (OLD) Detects 3 µA
Leak
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Pre-Thermal Warning (PTW)
Thermal Shutdown (TSD)
Current Reference Terminal Short Flag (ISF)
Power-Save Mode with 10-µA Consumption
Undervoltage Lockout Sets the Default Data
The TLC5929 also has a power-save mode that sets
the total current consumption to 10 µA (typ) when all
outputs are off.
Typical Application Circuit (Multiple Daisy-Chained TLC5929s)
VLED
¼
¼
¼
¼
¼
¼
¼
¼
OUT0
SIN
OUT15
SOUT
OUT0
SIN
OUT15
SOUT
DATA
SCLK
LAT
VCC
VCC
SCLK
LAT
SCLK
LAT
TLC5929
TLC5929
ICn
IC1
VCC
GND
VCC
GND
BLANK
BLANK
IREF
BLANK
IREF
Controller
RIREF
RIREF
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SID Read
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
Copyright © 2011, Texas Instruments Incorporated