TLC5928
www.ti.com...................................................................................................................................................... SBVS120B–JULY 2008–REVISED OCTOBER 2008
16-Channel, Constant-Current LED Driver with LED Open Detection
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FEATURES
APPLICATIONS
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LED Video Displays
Message Boards
Illumination
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16 Channels, Constant Current Sink Output
with On/Off Control
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35-mA Capability (Constant Current Sink)
10-ns High-Speed Constant Current Switching
Transient Time
DESCRIPTION
The TLC5928 is a 16-channel, constant current sink
LED driver. Each channel can be turned on/off by
writing serial data to an internal register. The constant
current value of all 16 channels is set by a single
external resistor.
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Low On-Time Error
LED Power-Supply Voltage up to 17 V
VCC = 3.0 V to 5.5 V
Constant Current Accuracy:
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–
Channel-to-Channel = ±1%
Device-to-Device = ±1%
The TLC5928 has two error detection circuits: one for
LED open detection (LOD) and one for a pre-thermal
warning (PTW). LOD detects
a
broken or
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CMOS Logic Level I/O
disconnected LED and LEDs shorted to GND while
the constant current output is on. PTW indicates a
high temperature condition.
35-MHz Data Transfer Rate
20-ns BLANK Pulse Width
Readable Error Information:
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LED Open Detection (LOD)
Pre-Thermal Warning (PTW)
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Operating Temperature: –40°C to +85°C
VLED
VLED
VLED
VLED
¼
¼
¼
¼
¼
¼
¼
¼
OUT0
OUT15
SOUT
OUT0
SIN
OUT15
SOUT
DATA
SIN
SCLK
VCC
VCC
SCLK
SCLK
LAT
LAT
Controller
LAT
VCC
GND
VCC
GND
BLANK
BLANK
IREF
BLANK
IREF
TLC5928
TLC5928
ERROR
READ
IC1
ICn
RIREF
RIREF
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Typical Application Circuit (Multiple Daisy-Chained TLC5928s)
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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.
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PowerPAD is a trademark of Texas Instruments, Inc.
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.
Copyright © 2008, Texas Instruments Incorporated