1FEATURES

23· 16 Channels, Constant Current Sink Output

· 50-mA Capability (Constant Current Sink)

· 16-Bit (65,536 Steps) Grayscale Control with

Enhanced Spectrum (ES) PWM

· 7-Bit (128 Steps) Global Brightness Control for

All Channels with Sink Current

· LED Power-Supply Voltage up to 17 V

· VCC = 3.0 V to 5.5 V

· Constant Current Accuracy:

– Channel-to-Channel = ±1.5%

– Device-to-Device = ±3%

· CMOS Level I/O

· 30-MHz Data Transfer Rate

· 33-MHz Grayscale Control Clock

· Auto Display Repeat

· Auto Data Refresh

· Continuous Base LED Open Detection (LOD):

– Detect LED opening and LED short to GND

during display

· Thermal Shutdown (TSD):

– Automatic shutdown at high temperature

conditions

– Restart under normal temperature

· Readable Error Information:

. LED Open Detection (LOD)

. Thermal Error Flag (TEF)

· Noise Reduction:

. 4-channel grouped delay to prevent inrush

current

· Operating Temperature: .40°C to +85°C

APPLICATIONS

· Monochrome, Multicolor, Full-Color LED

Displays · LED Signboards

· Display Backlighting

DESCRIPTION

The TLC5943 is a 16-channel, constant current sink

driver. Each channel is individually adjustable with

65,536 enhanced spectrum pulse-width modulated

(PWM) steps controlled by grayscale (GS) data. All

output drivers are adjustable with 128 constant sink

current steps at same value controlled by brightness

control (BC) data. Both GS data and BC data are

writable via a serial interface port. The maximum

current value of all 16 channels can be set by a

single external resistor.