The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant sink current (dot correction) steps. The dot correction (DC) adjusts for brightness variations between LEDs. Both grayscale (GS) control and DC are accessible via a common serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection (LOD), a thermal error flag (TEF), and a pre-thermal warning (PTW). The LOD detects a broken or disconnected LED, and a shorted LED to GND during the display period. The TEF indicates a too-high temperature condition; when the TEF is set, all output drivers are turned off by the thermal shutdown (TSD) protection. Additionally, when the TEF is cleared, all output drivers are restarted. The PTW indicates that the IC is operating in a high temperature condition. The output drivers remain on when PTW is set.

• 16 Channels, Constant Current Sink Output
• 60-mA Capability (Constant Current Sink)
• 12-Bit (4096 Steps) Grayscale Control with PWM
• 6-Bit (64 Steps) Dot Correction with Sink Current
• Internal Pre-Charge FET to Prevent LED Ghosting Phenomenon on Multiplexed LED Systems
• LED Power-Supply Voltage up to 15 V
• VCC = 3.0 V to 5.5 V
• Constant Current Accuracy:
  • Channel-to-Channel = ±1%
  • Device-to-Device = ±3%
• CMOS Logic Level I/O
• 30-MHz Data Transfer Rate
• 33-MHz Grayscale Control Clock
• Continuous Base LED Open Detection (LOD):
  • Detect LED opening and LED short to GND during display with auto output off function
• Thermal Shutdown (TSD):
  • Automatic shutdown at over-temperature conditions
  • Restart under normal temperature
• Pre-Thermal Warning (PTW):
  • High temperature operation alert
• Readable Error Information:
  • LED Open Detection (LOD)
  • Thermal Error Flag (TEF)
  • Pre-Thermal Warning (PTW)
• Noise Reduction:
  • 4-channel grouped delay to prevent inrush current
• Operating Temperature: -40°C to +85°C
• APPLICATIONS
  • Monochrome, Multicolor, Full-Color LED Displays Using Multiplexing System
  • LED Signboards Using Multiplexing System

All trademarks are the property of their respective owners.

• Features
• Dot Correction, Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, PWM LED Driver, Power Good, Thermal Shutdown
• Analog dimming steps
• 64
• Data transfer rate (Typ) (MHz)
• 30
• Ch to ch accuracy (Typ) (+/- %)
• 1
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 85

TLC5944的完整型号有：TLC5944PWP、TLC5944PWPR、TLC5944RHBT，以下是这些产品的关键参数及官网采购报价：

TLC5944PWP，工作温度：-40 to 85，封装：HTSSOP (PWP)-28，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TLC5944PWP的批量USD价格：1.109（1000+）

TLC5944PWPR，工作温度：-40 to 85，封装：HTSSOP (PWP)-28，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TLC5944PWPR的批量USD价格：0.924（1000+）

TLC5944RHBT，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TLC5944RHBT的批量USD价格：0.974（1000+）

TLC594XEVM-SW — TLC594x 系列评估软件

The TLC594x Graphical User Interface (GUI) allows users to change colors and interact with the TLC594x board. The program can be used with or without the board attached.

TLC5944 IBIS Model

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