TLC59284 Datasheet, PDF (1/23 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with Switching Delay

TLC59284
www.ti.com
SBVS208A – OCTOBER 2012 – REVISED OCTOBER 2012
16-Channel, Constant-Current LED Driver with Switching Delay
Check for Samples: TLC59284
FEATURES
1
•2 16-Channel, Constant-Current Sink Output
with On and Off Control
• Constant-Current Sink Capability:
– 35 mA (V_CC ≤ 3.6 V)
– 45 mA (V_CC > 3.6 V)
• LED Power-Supply Voltage: Up to 10 V
• V_CC: 3 V to 5.5 V
• Constant-Current Accuracy:
– Channel-to-Channel:
±1.4% (typ), ±3% (max)
– Device-to-Device: ±2% (typ), ±4% (max)
• CMOS Logic Level I/O
• Data Transfer Rate: 35 MHz
• BLANK Pulse Width: 50 ns
• Switching Delay for Noise Reduction
• Operating Temperature: –40°C to +85°C
APPLICATIONS
• Video Displays
• Message Boards
DESCRIPTION
The TLC59284 is a 16-channel, constant-current sink
light-emitting diode (LED) driver. Each channel can
be individually controlled with a simple serial
communications protocol that is compatible with 3.3-V
or 5-V CMOS logic levels, depending on the
operating VCC. When the serial data buffer is loaded,
a LAT rising edge transfers the data to the OUTn
outputs. The BLANK pin can be used to turn off all
OUTn outputs during power-on and output data
latching to prevent unwanted image displays during
these times. The constant-current value of all 16
channels is set by a single external resistor.
VLED
¼
¼
¼
Controller
DATA
SCLK
LAT
BLANK
R_IREF
¼
¼
¼ _OUT0
OUT15
SIN
SCLK
SOUT
VCC
LAT
BLANK
VCC
IREF
GND
Device 1
R_IREF
¼
¼ _OUT0
OUT15
SIN
SCLK
SOUT
VCC
LAT
BLANK
VCC
IREF
GND
Device n
3
Typical Application Circuit (Multiple Daisy-Chained TLC59284s)
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.
All trademarks are the property of their respective owners.
2
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 © 2012, Texas Instruments Incorporated