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.

The TLC5943 has two error detection circuits for LED open detection (LOD) and a thermal error flag (TEF). LOD detects a broken or disconnected LED and shorted LED to GND during the display period. TEF indicates an over-temperature condition; when a TEF is set, all output drivers are turned off. When the TEF is cleared, all output drivers are restarted.

• 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

PowerPAD is a trademark of Texas Instruments, Inc. All other trademarks are the property of their respective owners.