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TLC5957 Datasheet(PDF) 1 Page - Texas Instruments

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Part No. TLC5957
Description  TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED OPEN Detection and Caterpillar Cancelling
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

TLC5957 Datasheet(HTML) 1 Page - Texas Instruments

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X 48
COM n
COM 1
COM 0
SW
COM 1
VLED
SW
COM 0
SW
COM n
VLED
VLED
OUTR0
GCLK
FLAGS
READ
LAT
SCLK
DATA
Controller
3
ICn
IC1
TLC5957
TLC5957
SIN
SCLK
LAT
GCLK
IREF
GND
OUTR0
OUTB15
SOUT
Thermal
Pad
VCC
GND
IREFGND
SIN
SCLK
LAT
GCLK
GND
IREFGND
IREF
OUTB15
SOUT
Thermal
Pad
VCC
V
CC
GND
X 48
V
CC
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TLC5957
SLVSCQ4 – OCTOBER 2014
TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET,
LED OPEN Detection and Caterpillar Cancelling
1 Features
2 Applications
1
48 Constant-Current Sink Output Channels
LED Video Displays
Sink Current Capability with Max BC/CC data
LED Signboards
1~20mA (VCC = 3.3V)
3 Description
1~25mA (VCC = 5V)
The TLC5957 is a 48-channel constant current sink
Global Brightness Control (BC): 3-Bit (8 Step)
driver. Each channel has an individually-adjustable,
Global Brightness Control (CC) for Each Color
65536-step, pulse width modulation (PWM) grayscale
Group: 9-Bit (512 Step), Three Groups
(GS) brightness control.
LED Power Supply Voltage up to 10V
The output channels are divided into three groups,
VCC = 3.0 to 5.5V
each group has a 512 step color brightness control
(CC), CC adjusts brightness between colors. The
Knee Voltage Vout = 0.24V at 10mA
maximum current value of all 48 channels can be set
Constant Current Accuracy
by 8-step global brightness control (BC). BC adjusts
Channel to Channel = ±1%(Typ), ±3%(Max)
brightness deviation between LED drivers. GS, CC
and BC data are accessible via a serial interface port.
Device to Device = ±1%(Typ), ±2%(Max)
Data Transfer Rate : 33MHz
TLC5957 has one error flag: LED open detection
(LOD), which can be read via a serial interface port.
Grayscale Control Clock : 33MHz
Each constant-current has a pre-charge field- effect
Pre-charge FET for Ghost Cancelling
transistor (FET), which can remove ghosting and
Enhanced Circuit for Caterpillar Cancelling
improve display performance on the multiplexing LED
display. Besides, TLC5957 has an enhanced circuit, it
Selectable Data Transfer Bit and PWM Bit (9 bit to
can cancel the caterpillar effect caused by LED open.
16 bit)
Selectable Traditional PWM and ES-PWM
TLC5957 has a poker data transmission mode; GS
data length can be configured from 9 bit to 16 bit
LED Open Detection (LOD)
according to PWM bits in each sub-segment. Poker
Thermal Shut Down (TSD)
Mode can significantly increase visual refresh rate in
Auto Display Repeat/Auto Data Refresh
multiplexing applications.
Delay Switching to Prevent Inrush Current
Device Information(1)
Operating Temperature : –40°C to +85°C
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TLC5957
QFN (56)
8.0 mm × 8.0 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Circuit (Multiple Daisy Chained TLC5957s)
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.


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