Texas Instruments TLC5940 pdf datasheet download

TLC5940

16 CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL

FEATURES

· 16 Channels
· 12 bit (4096 Steps) Grayscale PWM Control
· Dot Correction
 – 6 bit (64 Steps)
– Storable in Integrated EEPROM
 · Drive Capability (Constant-Current Sink)
 · LED Power Supply Voltage up to 17 V
 · VCC = 3 V to 5.5 V
· Serial Data Interface
· Controlled In-Rush Current
· 30MHz Data Transfer Rate
· CMOS Level I/O
· Error Information 
– LOD: LED Open Detection
– TEF: Thermal Error Flag

APPLICATIONS

· Monocolor, Multicolor, Full-Color LED Displays 2
· LED Signboards
· Display Backlighting
· General, High-Current LED Drive
– 0 mA to 60 mA (VCC < 3.6 V)
– 0 mA to 120 mA (VCC > 3.6 V)

DESCRIPTION

The TLC5940 is a 16-channel, constant-current sink LED driver. Each channel has an individually
 adjustable 4096-step grayscale PWM brightness
control and a 64-step, constant-current sink (dot
correction). The dot correction adjusts the brightness  variations between LED channels and other LED
 drivers. The dot correction data is stored in an
 integrated EEPROM. Both grayscale control and dot
 correction are accessible via a serial interface. A single external resistor sets the maximum current
value of all 16 channels.
The TLC5940 features two error information circuits.
 The LED open detection (LOD) indicates a broken or
 disconnected LED at an output terminal. The thermal
error flag (TEF) indicates an overtemperature
condition.


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