TLC5954 Datasheet, PDF (1/45 Pages) Texas Instruments – TLC5954 48-Channel, Constant-Current LED Driver with Global Brightness Control, LED Open-Short Detection, and Power-Save Mode

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TLC5954
SBVS241 – APRIL 2014
TLC5954 48-Channel, Constant-Current LED Driver with Global Brightness Control,
LED Open-Short Detection, and Power-Save Mode
1 Features
•1 48 Constant-Current Sink Output Channels with
On or Off Control
• Current Capability:
– 34.9 mA for 32 Channels
– 24.4 mA 16 Channels
• No External Resistor for Current Setting
• Maximum Current Control (MC): 3 Bits (8 Steps)
• Global Brightness Control (BC) for Each Color
Group: 7 Bits (128 Steps), Three Groups
• LED Power-Supply Voltage: Up to 10 V
• VCC = 3.0 V to 3.6 V
• Constant-Current Accuracy:
– Channel-to-Channel = ±1% (typ), ±3% (max)
– Device-to-Device = ±2% (typ), ±4% (max)
• Data Transfer Rate: 30 MHz
• BLANK Pulse Duration: 40 ns (min)
• LED Open Detection (LOD)
• LED Short Detection (LSD)
• Power-Save Mode (PSM): 7-µA Consumption,
High-Speed Recovery
• Undervoltage Lockout Sets Default Data
• Delayed Switching Minimizes Inrush Current
• Operating Temperature: –40°C to +85°C
2 Applications
• LED Video Displays
• Variable Message Signs (VMS)
• Illumination
3 Description
The TLC5954 is a 48-channel, constant-current sink
LED driver. Each channel can be turned on or off by
writing data to an internal register. The output
channels (OUTXn) are grouped into three groups of
16 channels. Each channel group (R, G, and B) has a
128-step global brightness control (BC) function. The
maximum current value of all 48 channels can be set
with an 8-step maximum current control (MC)
function. The device has two error flags: LED open
detection (LOD) and LED short detection (LSD). The
error flags can be read via a serial interface port. The
device also has a power-save mode that sets the
total current consumption to 7 µA (typ) when all
outputs are off.
Device Information⁽¹⁾
DEVICE NAME
PACKAGE
BODY SIZE
TLC5954
VQFN (56)
8 mm × 8 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
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Application Circuit
V_LED
+
x48
GND
Input Serial Data
Shift Clock
Data Latch
BLANK Signal
OUTR0
OUTB15
SIN
SOUT
SCLK
LAT
TLC5954
VCC
BLANK
PowerPAD
GND
GND
Output Serial Data
V_CC
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.