TLC59283 Datasheet, PDF (1/25 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with Pre-Charge FET

TLC59283
www.ti.com
SBVS199A – JUNE 2012 – REVISED JUNE 2012
16-Channel, Constant-Current LED Driver with Pre-Charge FET
Check for Samples: TLC59283
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
• Pre-Charge FET for Ghosting Reduction
• Grouped Switching Delay for Noise Reduction
• Operating Temperature: –40°C to +85°C
APPLICATIONS
• Video Displays
• Message Boards
DESCRIPTION
The TLC59283 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.
Each constant-current output has a pre-charge field-
effect transistor (FET) that can reduce ghosting on
the multiplexing (dynamic) drive LED display. Multiple
TLC59283s can be cascaded together to control
additional LEDs from the same processor.
VLED
+
SW
COMn
COMn
VLED
SW
COM1
COM1
VLED
SW
COM0 COM0
¼
Controller
DATA
SCLK
LAT
BLANK
R_IREF
OUT0 ^¼ OUT15
SIN
SOUT
SCLK
LAT
BLANK
VCC
IREF
Device 1
VCC
GND
R_IREF
OUT0 ^¼ OUT15
SIN
SOUT
SCLK
LAT
BLANK
VCC
IREF
Device n
VCC
GND
3
Typical Application Circuit (Multiple Daisy-Chained TLC59283s)
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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