TLC5952 Datasheet, PDF (1/33 Pages) Texas Instruments – 24-Channel, Constant-Current LED Driver with Global Brightness Control and LED Open-Short Detection

TLC5952
www.ti.com........................................................................................................................................................................................................ SBVS129 – MAY 2009
24-Channel, Constant-Current LED Driver with
Global Brightness Control and LED Open-Short Detection
FEATURES
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•23 24-Channel Constant-Current Sink Output with
On/Off Control
• Current Capability:
– 35 mA for 16 Channels
– 26.2 mA for 8 Channels
• Global Brightness Control (BC) for Each Color
Group: 7-Bit (128 Step), Three Groups
• LED Power-Supply Voltage up to 15 V
• V_CC = 3.0 V to 5.5 V
• Constant-Current Accuracy:
– Channel-to-Channel = ±1%
– Device-to-Device = ±3%
• CMOS Logic Level I/O
• Data Transfer Rate: 35 MHz
• BLANK Pulse Width: 15 ns
• Open Load, Short Load, and Over-Temperature
Detection
• Thermal Shutdown (TSD) with Auto Restart
• Delay Switching to Prevent Inrush Current
V_LED
• Operating Temperature: –40°C to +85°C
• Packages: HTSSOP-32, QFN-32
APPLICATIONS
• Full-Color LED Displays
• LED Signboards
DESCRIPTION
The TLC5952 is a 24-channel, constant-current sink
driver. Each channel can be turned on/off with
internal register data. The output channels are
grouped into three groups of eight channels each.
Each channel group has a 128-step global brightness
control (BC) function. Both on/off data and BC are
writable via a serial interface. The maximum current
value of all 24 channels is set by a single external
resistor.
The TLC5952 has three error detection circuits: LED
open detection (LOD), LED short detection (LSD),
and a thermal error flag (TEF). The error detection is
read via a serial interface.
+
¼
¼
¼
DATA
SCLK
LAT
BLANK
Controller
R_IREF
¼
¼
¼ _OUTR0
OUTB7
SIN
SOUT
SCLK
LAT
BLANK
TLC5952
IC1
V_CC
V_CC
GND
IREF
R_IREF
¼
¼ _OUTR0
OUTB7
SIN
SOUT
SCLK
LAT
BLANK
TLC5952
ICn
V_CC
V_CC
GND
IREF
3
ERROR
READ
Typical Application Circuit (Multiple Daisy-Chained TLC5952s)
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments, Incorporated.
2
All other trademarks are the property of their respective owners.
3
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated