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SCLK

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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.