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.