The TLC5949 is a 16-channel, constant-current sink LED driver. Each channel has an individually-adjustable, pulse width modulation (PWM) grayscale (GS) brightness control with 4096 steps. All channels have a 128-step global brightness control (BC). BC adjusts brightness deviation with other LED drivers. GS and BC data are accessible with a serial interface port.
The TLC5949 has six error flags: LED open detection (LOD), LED short detection (LSD), output leakage detection (OLD), reference current terminal short flag detection (ISF), pre-thermal warning (PTW), and thermal error flag (TEF). The error detection results can be read with a serial interface port.
FEATURES
• 16 Constant-Current Sink Output Channels
• Sink Current Capability with Maximum BC Data: 2 mA to 45 mA
• Global Brightness Control (BC):
– 7-Bit (128 Steps) with 25% to 100% Range
• Grayscale Control (GS) with Enhanced Spectrum or Conventional PWM:
– 12-Bit (4096 Steps)
• LED Power-Supply Voltage: Up to 10 V
• VCC: 3.0 V to 3.6 V
• Constant-Current Accuracy:
– Channel-to-Channel: ±0.6% (typ), ±2% (max)
– Device-to-Device: ±1% (typ), ±4% (max)
• Data Transfer Rate: 33 MHz
• Grayscale Control Clock: 33 MHz
• Auto Display Repeat and Auto Data Refresh
• Display Timing Reset
• Power-Save Mode to Minimize VCC Current
• LOD and LSD with Invisible Detection Mode (IDM)
• Output Leakage Detection (OLD)
• Current Reference Terminal Short Flag (ISF)
• Thermal Shutdown (TSD) and Error Flag (TEF)
• Pre-Thermal Warning (PTW)
• Four-Channel Grouped Delay Switching to Prevent Inrush Current
