The TLC5940 is a 16-channel, constant-current sink LED driver. Each channel has an individually adjustable 4096-step grayscale PWM brightness control and a 64-step, constant-current sink (dot correction). The dot correction adjusts the brightness variations between LED channels and other LED drivers. The dot correction data is stored in an integrated EEPROM. Both grayscale control and dot correction are accessible through a serial interface. A single external resistor sets the maximum current value of all 16 channels.

The TLC5940 features two error information circuits. The LED open detection (LOD) indicates a broken or disconnected LED at an output terminal. The thermal error flag (TEF) indicates an overtemperature condition.

• 16 Channels
• 12 bit (4096 Steps) Grayscale PWM Control
• Dot Correction
  • 6 bit (64 Steps)
  • Storable in Integrated EEPROM
• Drive Capability (Constant-Current Sink)
  • 0 mA to 60 mA (VCC < 3.6 V)
  • 0 mA to 120 mA (VCC > 3.6 V)
• LED Power Supply Voltage up to 17 V
• VCC = 3 V to 5.5 V
• Serial Data Interface
• Controlled In-Rush Current
• 30 MHz Data Transfer Rate
• CMOS Level I/O
• Error Information
  • LOD: LED Open Detection
  • TEF: Thermal Error Flag

• Number of channels (#)
• 16
• LED current per channel (mA)
• 120
• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 5.5
• Features
• PWM control, Serial interface
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog

TLC5940的完整型号有：TLC5940PWP、TLC5940PWPR、TLC5940RHBR，以下是这些产品的关键参数及官网采购报价：

TLC5940PWP，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TLC5940PWP的批量USD价格：1.379（1000+）

TLC5940PWPR，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TLC5940PWPR的批量USD价格：1.158（1000+）

TLC5940RHBR，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：3000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TLC5940RHBR的批量USD价格：1.208（1000+）

LED-FRAME-DESIGNER — LED 框架设计者软件

LED Frame Designer Software allows the user to individually control the Dot Correction and PWM dimming levels for each LED on the TLC59xx EVM. The software also allows the user to program and play multiple LED “frames” to create different lighting patterns on the EVM.

TLC5940 Programming Flow Chart

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